Icing Method

Abstract

To provide an icing method effective after exercise.SOLUTION: There is provided an icing method performed after exercise in which a body is immersed in hydrogen carbonated water in which carbon dioxide and hydrogen of high concentration are dissolved and the water temperature is adjusted to 10-25 degrees. The dissolved carbon dioxide concentration in the hydrogen carbonated water is adjusted to 260 ppm or more, and the dissolved hydrogen concentration in the hydrogen carbonated water is adjusted to 0.1-1.6 ppm.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method of icing, for example, after exercise. [Background technology]

[0002] For example, athletes, whether professional or amateur, accumulate physical fatigue through training and competition. Leaving this physical fatigue untreated can lead to a decline in performance and the risk of injury, so how to recover from accumulated fatigue is important for maintaining performance and avoiding injury.

[0003] Common post-exercise methods include massage and bathing. For example, Patent Document 1 discloses a bathing method in which a bather is levitated by a supply of liquid ejected from an ejection nozzle installed in the bathtub, and the bather's body is massaged in a free state without being restrained by the floor or side walls.

[0004] According to this method, the body floats in the bath liquid and receives the upward flow of the liquid on the underside of the body, which is said to effectively massage essential parts. However, it is said that massage is almost ineffective unless performed properly, and the method disclosed in Patent Document 1 may be no different from simply taking a bath for some people, resulting in little effect. Therefore, other effective methods of dealing with post-exercise pain have been desired. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-212196 Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the above-mentioned problems, the present invention aims to provide an effective icing method after exercise. [Means for solving the problem]

[0007] This invention is an icing method to be performed after exercise, in which the body is immersed in hydrogen carbonated water in which carbon dioxide and hydrogen are dissolved at high concentrations and the water temperature is adjusted to be between 10 and 25 degrees. The dissolved carbon dioxide concentration in the hydrogen carbonated water is adjusted to 260 ppm or more, and the dissolved hydrogen concentration in the hydrogen carbonated water is adjusted to 0.1 ppm or more and 1.6 ppm or less, and the body is immersed in the hydrogen carbonated water for 5 minutes or more and 25 minutes or less. It is characterized by: Please note that icing methods do not include medical procedures. Dissolving carbon dioxide and hydrogen to a high concentration as described above means intentionally dissolving carbon dioxide and hydrogen in a solvent such as water or hydrogen carbonated water to increase the dissolved concentrations of carbon dioxide and hydrogen compared to the solvent before dissolution.

[0008] The above-mentioned "body immersion" includes immersing part or all of a person's body after exercise in bicarbonate water. For example, it includes immersing the shoulders, upper waist, or upper knees in a bicarbonate bath. Note that a part of the human body is preferably at least one-fourth of the body, and more preferably the muscles used in exercise are immersed.

[0009] This invention effectively reduces heart rate after exercise, accelerates heat dissipation through vasodilatory action, and prevents excessive drop in body temperature. Furthermore, while icing the immersed area, it also prevents a decrease in maximum power during anaerobic exercise after icing. In this way, the invention allows the body to effectively rest and recover from fatigue after exercise.

[0010] Also, The dissolved carbon dioxide concentration in the hydrogen carbonated water may be adjusted to 260 ppm or more, and the dissolved hydrogen concentration in the hydrogen carbonated water may be adjusted to 0.1 ppm or more and 1.6 ppm or less. Also, the dissolved carbon dioxide concentration in the hydrogen carbonated water is preferably adjusted to 600 ppm or more, and more preferably adjusted to 800 ppm or more and 1400 ppm or less.

[0011] In another embodiment of the present invention, it is preferable to adjust the dissolved hydrogen concentration in the hydrogen carbonated water to 0.2 ppm or more. of It is preferable to adjust the concentration to 0.2 ppm or more and 1.6 ppm or less.

[0012] Furthermore, the dissolved concentration of carbon dioxide in the hydrogen carbonated water is 800 ppm or more and 1200 ppm or less, and the dissolved concentration of hydrogen in the hydrogen carbonated water is of It is more preferable to adjust it to 0.4 ppm or more and 0.7 ppm or less.

[0013] It is also preferable to adjust the temperature of the hydrogen carbonated water to 15°C or higher and 22°C or lower. In another embodiment of the present invention, the above-described icing method may also be performed before exercise, and in the above-described icing method, the before exercise may be the day before the exercise day. [Effects of the Invention]

[0014] This invention provides an effective icing method after exercise. [Brief explanation of the drawings]

[0015] [Figure 1] A line graph showing changes in heart rate. [Figure 2] Bar graph showing the change in sublingual temperature. [Figure 3] A line graph showing changes in blood lactate concentration. [Figure 4] Bar graph showing the change in maximum power during anaerobic exercise. [Figure 5] 1 is a bar graph showing the change in reactive oxygen scavenging activity after anaerobic exercise. [Figure 6] A line graph showing changes in heart rate. [Figure 7] Bar graph showing change in aerobic mechanical efficiency. [Figure 8] Bar graph showing the change in anaerobic capacity. [Figure 9]A bar graph showing the change in reactive oxygen scavenging activity between the first and fourth days. [Figure 10] Correlation diagram between the rate of change in hydroxyl radical (·OH) scavenging activity and the rate of change in maximum power. DETAILED DESCRIPTION OF THE INVENTION

[0016] Through extensive efforts, the inventors have discovered an icing method that effectively recovers physical fatigue after exercise by immersing the body for 5 to 25 minutes after exercise in hydrogen carbonated water, in which hydrogen and carbon dioxide are dissolved to a high concentration and the water temperature is adjusted to be between 10 and 25 degrees Celsius.

[0017] Here, "carbonated hydrogen water" refers to water in which hydrogen and carbon dioxide have been dissolved, and there are no particular limitations on the method of production as long as the amount of hydrogen or carbon dioxide dissolved is greater than that of the solvent (water or water in which hydrogen or carbon dioxide has been dissolved) before dissolution. Specifically, hydrogen and carbon dioxide may be mixed and dissolved in water, carbon dioxide may be dissolved in hydrogen water in which hydrogen has been dissolved in water, or hydrogen may be dissolved in carbonated water in which carbon dioxide has been dissolved in water.

[0018] In this embodiment, a mixed gas of 8% hydrogen and 92% carbon dioxide is made into fine bubbles, which are dispersed and dissolved in water to produce hydrogen carbonated water. Specifically, hydrogen carbonated water is produced by dissolving and dispersing fine bubbles in water or hydrogen carbonated water, creating a mixed gas of 8% hydrogen and 92% carbon dioxide. This water is then poured into the bathtub. For longer bath times, the hydrogen carbonated water produced by the above method is poured into the bathtub while the bather is bathing, and some of the hydrogen carbonated water in the bathtub is recovered. The mixed gas is dispersed and dissolved in the recovered hydrogen carbonated water as fine bubbles. Carbon dioxide and hydrogen are then redissolved in the recovered hydrogen carbonated water and circulated.

[0019] In this embodiment, hydrogen carbonated water is produced using a mixed gas of 8% hydrogen and 92% carbon dioxide. The mixed gas used to produce hydrogen carbonated water is The ratio is not limited to this, and the hydrogen ratio may be changed within the range of 4% to 50%. For example, a mixed gas of 4% hydrogen and 96% carbon dioxide, or a mixed gas of 50% hydrogen and 50% carbon dioxide may be used.

[0020] In this way, by dissolving a mixed gas of hydrogen and carbon dioxide in water as fine bubbles, it is possible to make the hydrogen and carbon dioxide more easily dissolve. Also, for example, it is possible to temporarily make the hydrogen and carbon dioxide supersaturated. This is thought to make it easier for the body immersed in the water to absorb the hydrogen and carbon dioxide.

[0021] As described above, the dissolved carbon dioxide concentration in the hydrogen carbonated water is adjusted to 260 ppm or more, and the dissolved hydrogen concentration is adjusted to 0.1 ppm or more and 1.6 ppm or less. The dissolved carbon dioxide concentration in the hydrogen carbonated water is preferably 600 ppm or more and 1400 ppm or less, and the dissolved hydrogen concentration is preferably 0.2 ppm or more and 1.6 ppm or less.

[0022] If the dissolved carbon dioxide concentration is less than 260 ppm, the effects of carbon dioxide absorbed from the immersed area cannot be fully achieved. In contrast, by increasing the dissolved carbon dioxide concentration to 260 ppm or more, the effects of carbon dioxide, such as vasodilatory action, can be achieved.

[0023] Furthermore, if the dissolved carbon dioxide concentration is adjusted to less than 600 ppm, the carbon dioxide will escape from the hydrogen carbonated water over time, and the effects of carbon dioxide cannot be fully obtained if a long time has passed since the production of the hydrogen carbonated water.In contrast, by adjusting the dissolved carbon dioxide concentration to 600 ppm or more, the effects of carbon dioxide can be fully obtained even if a long time has passed since the production of the hydrogen carbonated water.

[0024] Furthermore, if the dissolved carbon dioxide concentration is adjusted to be higher than 1400 ppm, the amount of hydrogen that can be dissolved in the hydrogen carbonated water will decrease, weakening the effect of hydrogen. Therefore, by adjusting the dissolved carbon dioxide concentration to 1400 ppm or less, the amount of hydrogen that can be dissolved in the hydrogen carbonated water can be secured, and the effect of hydrogen can be obtained in addition to the effect of carbon dioxide.

[0025] If the dissolved hydrogen concentration is adjusted to less than 0.1 ppm, the concentration of hydrogen dissolved in the hydrogen carbonated water will be low and the effect of hydrogen will be weak.On the other hand, if the dissolved hydrogen concentration is adjusted to 0.1 ppm or more, the effect of hydrogen can be obtained in addition to the effect of carbon dioxide.

[0026] If the dissolved hydrogen concentration is adjusted to less than 0.2 ppm, hydrogen will be lost from the hydrogen carbonated water over time, weakening the effect of hydrogen. On the other hand, if the dissolved hydrogen concentration is adjusted to 0.2 ppm or more, the effect of hydrogen can be obtained even if hydrogen is lost from the hydrogen carbonated water over time.

[0027] Furthermore, if the dissolved hydrogen concentration is adjusted to be higher than 1.6 ppm, it will be the same as the saturated solubility of hydrogen under normal pressure, making it difficult to dissolve carbon dioxide and weakening the effects of carbon dioxide.On the other hand, if the dissolved hydrogen concentration is adjusted to be 1.6 ppm or less, carbon dioxide can be dissolved, allowing the effects of both carbon dioxide and hydrogen to be obtained.

[0028] In addition, it is preferable that the dissolved carbon dioxide concentration of the hydrogen carbonated water is adjusted to 800 ppm or more and 1200 ppm or less, and the dissolved hydrogen concentration is adjusted to 0.4 ppm or more and 0.7 ppm or less.

[0029] By adjusting the dissolved carbon dioxide concentration to between 800 ppm and 1200 ppm, and the dissolved hydrogen concentration to between 0.4 ppm and 0.7 ppm, it is possible to achieve a state in which both carbon dioxide and hydrogen are dissolved at high concentrations, allowing the body to absorb sufficient amounts of carbon dioxide and hydrogen and to fully obtain the effects of carbon dioxide and hydrogen.

[0030] Furthermore, because both carbon dioxide and hydrogen are sufficiently dissolved, the dissolved concentrations of carbon dioxide and hydrogen are maintained at high levels even over time, allowing the effects of bathing to be maintained for a long period of time.

[0031] In addition, the temperature of the hydrogen carbonated water in this embodiment is preferably adjusted to 10°C or higher and 25°C or lower, and more preferably adjusted to 15°C or higher and 22°C or lower.

[0032] If the water temperature is adjusted below 10°C, the body will be overcooled, which may reduce performance in subsequent exercise. Also, if the water temperature is higher than 25°C, the amount of hydrogen and carbon dioxide dissolved will decrease, reducing the effects of hydrogen and carbon dioxide and reducing the icing effect to a certain extent.

[0033] In contrast, by adjusting the water temperature of hydrogen carbonated water to between 10 and 25 degrees, carbon dioxide and hydrogen can be sufficiently dissolved in the water, and in addition to the effects of carbon dioxide and hydrogen, an icing effect can be obtained.

[0034] Furthermore, by adjusting the water temperature to between 15°C and 22°C, the body can be prevented from becoming overcooled while allowing carbon dioxide and hydrogen to be absorbed into the body through the immersed area. This allows the effects of bathing in carbonated hydrogen water to be achieved while preventing a decline in performance during exercise performed after the icing method of the present invention.

[0035] In this embodiment, the body is immersed in hydrogen carbonated water for 20 minutes, but the immersion time is preferably 5 to 25 minutes. Immersion times longer than 25 minutes can cause excessive cooling of the body, potentially reducing performance in subsequent exercise, while immersion times shorter than 5 minutes can limit the benefits of hydrogen and carbon dioxide. In contrast, by setting the immersion time to between 5 and 25 minutes, the effects of carbon dioxide and hydrogen can be obtained without the body being excessively cooled.

[0036] For example, if the icing effect is important, it is preferable that the hydrogen carbonated water temperature be 10 to 20°C and the immersion time be 5 to 10 minutes. If the cooling down effect is important, it is preferable that the hydrogen carbonated water temperature be 15 to 25°C and the immersion time be 10 to 25 minutes.

[0037] "Fatigue" is defined as "a state of diminished bodily capacity accompanied by peculiar discomfort and a desire for rest, caused by excessive physical and mental activity or by illness," and is generally classified into mental fatigue and physical fatigue.

[0038] In this embodiment, "fatigue" refers to so-called physical fatigue, and refers to a state in which peripheral tissues such as muscles become exhausted due to stress on the body, resulting in a decrease in performance and work efficiency.

[0039] Specifically, a state in which performance or work efficiency declines means a decline in motor function, such as a decrease in endurance, such as a shortened exercise duration or a decrease in the number of repetitive exercises, or a decrease in maximum power in an anaerobic state or a decrease in muscle strength, such as muscle endurance.

[0040] In the present invention, being effective after exercise means having the effect of efficiently alleviating fatigue accumulated through exercise and improving performance and work efficiency that have declined due to exercise load to a more normal state.

[0041] For example, compared to other methods, the icing method of the present invention results in a lower rate of increase in heart rate and sublingual temperature, a decrease in blood lactic acid concentration, improved antioxidant effects, and improved exercise performance.

[0042] The present invention will be specifically described below with reference to Test Method 1 and Test Method 2 relating to the effect of recovering from fatigue after exercise, although the scope of the present invention is not limited thereto.

[0043] First, Test Method 1 and Comparative Methods 1-1, 1-2, and 1-3, which are compared with Test Method 1, will be explained, and their effects will be described.

[0044] The subjects for Test Method 1 were 20 male university students who exercise regularly, but were prohibited from strenuous exercise on the day of the test. In addition, meals, excluding water intake, were restricted to two hours before the start of the test, and eating and drinking were prohibited during the test.

[0045] The subjects were divided into four groups of five people each, and each group underwent one of the following methods: Test Method 1, Comparative Method 1-1, Comparative Method 1-2, or Comparative Method 1-3. The subjects also had their heart rate, sublingual temperature, lactic acid concentration, anaerobic exercise capacity, and active oxygen scavenging activity after anaerobic exercise measured at appropriate times, and the average values ​​for each group were calculated.

[0046] [Test Method 1] After resting for a specified period of time (referred to as "Initial"), the subjects performed one set of aerobic exercise (referred to as "AerE1") and anaerobic exercise (referred to as "AnaE1"). After that, they were asked to rest for 20 minutes while half-bathing in hydrogen carbonated water adjusted to 20 degrees (referred to as "Rest"). After the rest, the subjects performed two sets of aerobic exercise (referred to as "AerE2") and anaerobic exercise (referred to as "AnaE2"). The dissolved hydrogen concentration in the hydrogen carbonated water in which the subjects were bathed was 0.5 ppm, and the dissolved carbon dioxide concentration was 1000 ppm.

[0047] [Comparison method 1-1] This test is the same as Test Method 1, except that instead of "resting for 20 minutes with half of the body bathed in hydrogen carbonated water adjusted to 20 degrees," which corresponds to Rest in Test Method 1, the test was "resting for 20 minutes in a quiet sitting position."

[0048] [Comparison method 1-2] This test is the same as Test Method 1, except that instead of "having the subject rest for 20 minutes while half-bathing in hydrogen carbonated water adjusted to 20 degrees," which corresponds to Rest in Test Method 1, this test is "having the subject rest for 20 minutes while half-bathing in tap water adjusted to 20 degrees."

[0049] [Comparison method 1-3] This test is the same as Test Method 1, except that instead of "having the subject rest for 20 minutes while half-bathing in carbonated water adjusted to 20 degrees," which corresponds to Rest in Test Method 1, this test is "having the subject rest for 20 minutes while half-bathing in carbonated water adjusted to 20 degrees." The dissolved carbon dioxide concentration of the carbonated water was 1000 ppm.

[0050] For aerobic exercise, participants pedaled a bicycle for 10 minutes at an intensity that was approximately 50% of their maximum oxygen intake. In addition, as an anaerobic exercise, participants pedaled at full power for 30 seconds (the so-called Wingate test).

[0051] Heart rate was measured after each condition (Initial, AerE1, AnaE1, Rest, AerE2, after AnaE2) using a heart rate monitor (RS800CX, Polar Electro). Sublingual temperature was measured after aerobic exercise (AerE1) and anaerobic exercise (AnaE1) before rest (Rest), and after rest (Rest).

[0052] Blood lactate concentrations were measured using a portable blood gas analyzer (epoc, Siemens Healthineers) after blood samples were taken after rest (Initial), after aerobic exercise after rest (AerE1), after rest (Rest), and after aerobic exercise after rest (AerE2). Measurements and analysis were performed using a fluoroscopy system (manufactured by the company).

[0053] Anaerobic exercise capacity was measured during anaerobic exercise ('AnaE1' and 'AnaE2') using a high-intensity anaerobic power ergometer (powermax V, Combi) to measure maximum power during anaerobic exercise.

[0054] To measure reactive oxygen species, blood samples were taken after rest (Initial), aerobic exercise (AerE1 and AerE2), anaerobic exercise (AnaE1 and AnaE2), and rest (Rest), and the amount of reactive oxygen species (·OH) was measured using an electron spin resonance spectrometer (ES series, JEOL). The amount of reactive oxygen species was analyzed using the ESR spin trapping method.

[0055] The effects of Test Method 1 are described in detail below.

[0056] <About changes in heart rate> FIG. 1 shows the changes in heart rate in Test Method 1 and Comparative Methods 1-1, 1-2, and 1-3.

[0057] In Test Method 1 and Comparative Methods 1-3, as shown in Figure 1, the heart rate could be reduced to 90 or less by resting after one set of aerobic exercise (AerE1) and anaerobic exercise (AnaE1).

[0058] Furthermore, Test Method 1 and Comparative Method 1-3 were able to reduce the difference between heart rate before exercise (Initial) and heart rate after rest (Rest) compared to Comparative Methods 1-1 and 1-2. In other words, resting for 20 minutes while half-bathing in carbonated water or hydrogen carbonated water was able to sufficiently lower the post-exercise heart rate. Therefore, the burden on the heart was reduced and the parasympathetic nervous system was efficiently given priority, allowing the body to rest effectively. Therefore, fatigue was recovered more effectively than with the other methods (Comparative Methods 1-1 and 1-2).

[0059] The exact reason for this effect is unknown, but it can be interpreted as a synergistic effect of the vasodilatory effect of carbon dioxide, along with the bradycardia caused by the half-body bath. Despite the cold water, carbon dioxide exerts a vasodilatory effect by relaxing vascular smooth muscle, increasing the inflow of arterial blood, which in turn promotes venous return and lowers the heart rate.

[0060] Furthermore, in Test Method 1, the heart rate after anaerobic exercise (AnaE2) following rest was significantly lower than the heart rate after anaerobic exercise (AnaE1) before rest. Therefore, Test Method 1 not only lowers the heart rate, but also reduces the increase in heart rate during subsequent exercise. This is thought to result in more effective recovery from fatigue from exercise prior to rest.

[0061] <Changes in sublingual temperature> Figure 2 shows the change in sublingual temperature after the first anaerobic exercise and rest in Test Method 1 and Comparative Methods 1-1, 1-2, and 1-3. The values ​​in Figure 2 indicate the rate of increase in sublingual temperature after rest (Rest) relative to the sublingual temperature after anaerobic exercise (AnaE1).

[0062] As shown in Figure 2, the sublingual temperature of the subjects after resting increased in all three cases: Test Method 1, Comparative Method 1-1, Comparative Method 1-2, and Comparative Method 1-3. Specifically, the rate of increase in the sublingual temperature of the subjects after resting was 0.32% in Test Method 1, 1.25% in Comparative Method 1-1, 0.73% in Comparative Method 1-2, and 1.08% in Comparative Method 1-3.

[0063] From this, Test Method 1 and Comparative Methods 1-2 and 1-3 were able to significantly reduce the rise in the sublingual temperature of the subjects compared to Comparative Method 1-1, in which subjects rested in a quiet sitting position after exercise. This is thought to be due to the immediate vasoconstriction caused by bathing in cold water, which helped to regulate body temperature in a cold environment.

[0064] Test Method 1, in which the subjects rested while bathing half their body, and Comparative Methods 1-2 and 1-3 will be examined in detail. In comparison method 1-3, in which the subjects rested with their body half-bathed in carbonated water, the rate of increase in the subjects' sublingual temperature was higher than in comparison method 1-2, in which the subjects rested with their body half-bathed in tap water. This is presumably because the vasodilatory effect of carbon dioxide was effective, accelerating heat dissipation due to increased blood flow to the skin.

[0065] In contrast, Test Method 1, in which the subjects rested with their lower body bathed in hydrogen carbonated water, significantly reduced the rise in the subjects' sublingual temperature compared to Comparative Methods 1-2 and 1-3. This suggests that resting with their lower body bathed in hydrogen carbonated water has a synergistic effect of efficiently lowering body temperature while maintaining the vasodilatory effect of carbon dioxide.

[0066] <Changes in lactic acid concentration> FIG. 3 shows the changes in blood lactate concentration in Test Method 1 and Comparative Methods 1-1, 1-2, and 1-3.

[0067] As shown in Figure 3, in Comparative Method 1-1, the lactate concentration in the blood of the subjects after rest increased, whereas in Test Method 1, Comparative Method 1-2, and Comparative Method 1-3, in which subjects took a half-body bath, the lactate concentration in the blood of the subjects after rest decreased. This shows that resting while taking a half-body bath in cooling water at a water temperature of 20°C has the effect of reducing the lactate concentration in the blood.

[0068] Furthermore, in Comparative Methods 1-2 and 1-3, the blood lactate concentration after rest (Rest) was reduced by 3.22 mM and 3.04 mM, respectively, compared to the blood lactate concentration after exercise (AnaE1). From these results, there was no significant difference in the amount of change in the blood lactate concentration of the subjects between Comparative Methods 1-2 and 1-3.

[0069] In contrast, in Test Method 1, the blood lactate concentration after rest (Rest) was significantly lower at 3.91 mM compared to the blood lactate concentration after exercise (AnaE1). This suggests that a 20-minute half-body bath in hydrogen carbonated water at a temperature of 20°C after exercise can efficiently reduce blood lactate concentration and effectively recover from fatigue.

[0070] Although the exact reason why half-body bathing in hydrogen carbonated water reduces blood lactate levels is unknown, it is possible that the transdermal influx of hydrogen molecules increases the blood's lactate buffering capacity.

[0071] <Anaerobic exercise capacity> Figure 4 shows the change in maximum power during the second anaerobic exercise (AnaE2) relative to the maximum power during the first anaerobic exercise (AnaE1) for Test Method 1 and Comparative Methods 1-1, 1-2, and 1-3. The values ​​in Figure 4 indicate the rate of increase in maximum power during the second anaerobic exercise (AnaE2) relative to the maximum power during the first anaerobic exercise (AnaE1).

[0072] As shown in Figure 4, when comparing the maximum power of anaerobic exercise using Test Method 1 and Comparative Methods 1-1, 1-2, and 1-3, with the exception of Comparative Method 1-1, in which the subject rested for 20 minutes in a quiet sitting position, maximum power decreased in the second anaerobic exercise session (AnaE2). This shows that after resting with half-body immersion in cooling water at a temperature of 20°C, performance tends to decrease compared to the exercise session before the rest.

[0073] This is thought to be due to the fact that half-body bathing in cooling water at a temperature of 20°C leads to a drop in body temperature and muscle temperature. In other words, half-body bathing in cooling water at a temperature of 20°C causes vasoconstriction, reducing circulating blood volume and possibly causing a decline in performance during exercise after the half-body bath.

[0074] On the other hand, when comparing Test Method 1, in which the subjects took a half-body bath, with Comparative Methods 1-2 and 1-3, the rate of decrease in maximum power during the second anaerobic exercise (AnaE2) compared to the first anaerobic exercise (AnaE1) in each test was -0.97% for Test Method 1, -6.42% for Comparative Methods 1-2, and -1.80% for Comparative Methods 1-3. This shows that when subjects take a half-body bath in hydrogen carbonated water and then rest, the decrease in maximum power during anaerobic exercise after rest can be suppressed compared to the other methods (Comparative Methods 1-2 and 1-3), and they can demonstrate performance that is almost the same as the first anaerobic exercise.

[0075] <Scavenging activity of active oxygen after anaerobic exercise> Figure 5 shows the hydroxyl radical (·OH) scavenging activity in a resting state (initial) and after the second anaerobic exercise (AnaE2) in Test Method 1 and Comparative Methods 1-1, 1-2, and 1-3. The values ​​in Figure 5 indicate the rate of increase in hydroxyl radical (·OH) scavenging activity after the second anaerobic exercise (AnaE2) relative to the hydroxyl radical (·OH) scavenging activity in a resting state (initial).

[0076] As shown in Figure 5, in Comparative Methods 1-1, 1-2, and 1-3, the hydroxyl radical (·OH) scavenging activity after the second anaerobic exercise (AnaE2) was reduced compared to the resting state (Initial). In contrast, in Test Method 1, the hydroxyl radical (·OH) scavenging activity after the second anaerobic exercise (AnaE2) was improved by approximately 23% compared to the resting state.

[0077] This shows that by taking a half-body bath in carbonated water between the first and second bouts of exercise, it is possible to reduce the damage to the body caused by the hydroxyl radicals (·OH) generated during the second bout of exercise. In other words, even when exercising multiple times in a day, taking a rest period between bouts as in Test Method 1 can improve performance in the subsequent bouts of exercise.

[0078] Although the exact reason why half-body bathing in bicarbonate water improves the scavenging activity of hydroxyl radicals (·OH) is not clear, it is thought that the improvement in scavenging activity of hydroxyl radicals (·OH) is due to the transdermal immersion of hydrogen by half-body bathing in bicarbonate water, which enhances the scavenging activity of the large amounts of hydroxyl radicals (·OH) that are generated.

[0079] By resting for 20 minutes while half-bathing in carbonated hydrogen water at 20°C, the heart rate after exercise can be sufficiently reduced, fatigue can be recovered, and the rise in the subject's sublingual temperature can be significantly reduced, and body temperature can be efficiently reduced while maintaining the vasodilatory effect of carbon dioxide.Furthermore, the lactic acid concentration in the blood, which has increased due to exercise, can be efficiently reduced, and fatigue caused by exercise can be more efficiently recovered.

[0080] Furthermore, even when performing continuous intense exercise, resting in a half-body bath in bicarbonate water between sessions allows exercise after the half-body bath to perform at a level comparable to that before the half-body bath. Furthermore, exercise after a half-body bath significantly improves hydroxyl radical (·OH) scavenging activity, thereby improving exercise performance after the half-body bath.

[0081] Next, Test Method 2 and Comparative Methods 2-1, 2-2, and 2-3, which are compared with Test Method 2, will be explained, along with their effects.

[0082] The subjects for Test Method 2 were 20 male university students who exercise regularly, as with Test Method 1, and were prohibited from strenuous exercise on the day of the test. In addition, meals, excluding water intake, were restricted to two hours before the start of the test, and eating and drinking were prohibited during the test.

[0083] The subjects were divided into four groups of five people each, and each group underwent one of the above-mentioned test methods: Test Method 2, Comparative Method 2-1, Comparative Method 2-2, or Comparative Method 2-3. The subjects in each group were measured for heart rate, aerobic mechanical efficiency, and anaerobic exercise capacity at appropriate times, and the average values ​​for each group were calculated.

[0084] [Test Method 2] On the first day, the subjects were asked to wait in a quiet state for an appropriate period of time (referred to as "Initial 1"), after which they were asked to perform aerobic exercise (referred to as "AerE1") and anaerobic exercise (referred to as "AnaE1"). After this, they were asked to rest for 20 minutes (referred to as "Rest 1") while half-bathing in carbonated water adjusted to a temperature of 20 degrees.

[0085] On the second day, after checking the subject's physical condition (referred to as "Initial 2"), they underwent high-intensity training (referred to as "TP1"), followed by a 20-minute rest period (referred to as "Rest 2") while half-bathing in carbonated water adjusted to 20 degrees.

[0086] On the third day, after checking the subject's physical condition (referred to as "Initial 3"), the subject was asked to perform high-intensity training (referred to as "TP2"), after which the subject was asked to rest for 20 minutes while half-bathing in carbonated water adjusted to a temperature of 20°C (referred to as "Rest 3").

[0087] On the fourth day, after checking the subject's physical condition (referred to as "Initial 4"), the subject was asked to perform aerobic exercise (referred to as "Aer E2") and anaerobic exercise (referred to as "Ana E2"). The dissolved hydrogen concentration of the hydrogen carbonated water was 0.5 ppm, and the dissolved carbon dioxide concentration was 1000 ppm.

[0088] [Comparison method 2-1] This is the same as Test Method 2, except that instead of "resting for 20 minutes with half of the body bathed in hydrogen carbonated water adjusted to 20 degrees," which corresponds to Rest1, Rest2, and Rest3 in Test Method 2, "the subject rested for 20 minutes in a quiet sitting position."

[0089] [Comparison method 2-2] This is the same as Test Method 2, except that instead of "having the subject rest for 20 minutes while half-bathing in hydrogen carbonated water adjusted to 20 degrees," which corresponds to Rest1, Rest2, and Rest3 in Test Method 2, "having the subject rest for 20 minutes while half-bathing in tap water adjusted to 20 degrees" is used.

[0090] [Comparison method 2-3] This is the same as Test Method 2, except that instead of "having the subject rest for 20 minutes while half-bathing in hydrogen carbonated water adjusted to 20 degrees," which corresponds to Rest1, Rest2, and Rest3 in Test Method 2, "having the subject rest for 20 minutes while half-bathing in carbonated water adjusted to 20 degrees" is used. The dissolved carbon dioxide concentration of the carbonated water was 1000 ppm.

[0091] For aerobic exercise, participants pedaled a bicycle for 10 minutes at an intensity that was approximately 50% of their maximum oxygen intake. In addition, as an anaerobic exercise, participants pedaled at full power for 30 seconds (the so-called Wingate test).

[0092] The high-intensity training consisted of eight 20-second cycles of maximum effort pedaling, with 10 seconds of rest in between. The subjects were encouraged to perform at their best.

[0093] Heart rate was measured after each condition (Initial1, AerE1, AnaE1, Rest1, Initial2, TP1, Rest2, Initial3, TP2, Rest3, Initial4, AerE2, AnaE2) using a heart rate monitor (RS800CX, Polar Electro).

[0094] Aerobic mechanical efficiency was measured by cycling for 10 minutes at an intensity that was 50% of maximum oxygen uptake as aerobic exercise (AerE1 and AerE2). The energy expenditure during this period was measured using an exhaled gas energy metabolism measuring device (AE-310S, Minato Medical). Mechanical exercise efficiency was calculated as the work volume / energy expenditure.

[0095] Anaerobic exercise capacity was measured during anaerobic exercise (AnaE1 and AnaE2) using a high-intensity anaerobic power ergometer (powermax V, Combi) to measure maximum power during anaerobic exercise.

[0096] <About changes in heart rate> FIG. 6 shows the changes in heart rate in Test Method 2 and Comparative Methods 2-1, 2-2, and 2-3.

[0097] As shown in FIG. 6, Test Method 2 and Comparative Methods 2-3 were able to significantly reduce the heart rate compared to after exercise (AnaE1, TP1, TP2). Furthermore, compared to Comparative Methods 2-1 and 2-2, Test Method 2 and Comparative Method 2-3 were able to reduce the difference between heart rate before exercise (AerE1, TP1, TP2) and heart rate after rest. In other words, by resting while half-bathing in carbonated water or hydrogen carbonated water, it was possible to sufficiently lower heart rate after exercise and effectively recover from fatigue.

[0098] <Aerobic Mechanical Efficiency> Figure 7 shows the aerobic mechanical efficiency on days 1 and 4 for Test Method 2 and Comparative Methods 2-1, 2-2, and 2-3. The values ​​in Figure 7 indicate the rate of increase in aerobic mechanical efficiency on day 4 relative to the aerobic mechanical efficiency on day 1.

[0099] As shown in Figure 7, Test Method 2 improved the aerobic mechanical efficiency during the second aerobic exercise (AerE2) relative to the aerobic mechanical efficiency during the first aerobic exercise (AerE1) compared to Comparative Methods 2-1, 2-2, and 2-3. Specifically, the rate of increase in aerobic mechanical efficiency during the second aerobic exercise (AerE2) relative to the first aerobic exercise (AerE1) was +0.36% for Test Method 2, while it was -0.69% for Comparative Method 2-1, +0.30% for Comparative Method 2-2, and +0.27% for Comparative Method 2-3.

[0100] From this, it is thought that by continuously and continuously resting with half of your body bathed in hydrogen carbonated water at a water temperature of 20 degrees, it is possible to promote blood flow and improve the efficiency of oxygen transport, and further improve aerobic exercise capacity.

[0101] <Changes in anaerobic exercise capacity> Figure 8 shows the change in maximum power during anaerobic exercise on days 1 and 4 for Test Method 2 and Comparative Methods 2-1, 2-2, and 2-3. The values ​​in Figure 8 indicate the rate of increase in maximum power during anaerobic exercise on day 4 (AnaE2) relative to the maximum power during anaerobic exercise on day 1 (AnaE1).

[0102] In Comparative Methods 2-1 and 2-2, as shown in Figure 8, the increase in maximum power during anaerobic exercise on the fourth day (AnaE2) relative to the maximum power during anaerobic exercise on the first day (AnaE1) was -0.27% and -1.95%, respectively, indicating a decrease in maximum power during anaerobic exercise.

[0103] In addition, in comparative method 2-3, the rate of increase in maximum power during anaerobic exercise on the fourth day relative to the maximum power during anaerobic exercise on the first day was 0.75%, meaning there was almost no difference between the first and fourth days.

[0104] In contrast, in test method 2, the rate of increase in maximum power during anaerobic exercise on the fourth day compared to maximum power during anaerobic exercise on the first day was +2.94%, meaning that maximum power during anaerobic exercise increased significantly, resulting in improved performance.

[0105] This shows that by having subjects rest while half-bathing in hydrogen carbonated water at a water temperature of 20 degrees, it is possible to suppress the decline in maximum power during anaerobic exercise during exercise the following day. Therefore, by resting after exercising by half-bathing in hydrogen carbonated water at a water temperature of 20 degrees, fatigue can be recovered and performance can be improved in exercise the following day.

[0106] In this way, by resting for 20 minutes after exercise while half-bathing in hydrogen carbonated water at a temperature of 20 degrees, the heart rate after exercise can be sufficiently reduced and fatigue can be recovered. Furthermore, even when exercising the next day after resting for 20 minutes while half-bathing in hydrogen carbonated water at 20 degrees, aerobic mechanical efficiency can be improved and maximum power during anaerobic exercise can be increased. Therefore, even if there are consecutive games, fatigue can be recovered efficiently and performance can be improved in the next day's exercise.

[0107] In addition, using a method similar to Test Method 2 (Test Method 3), we will explain the effect of immersing in hydrogen carbonated water after exercising every day. The subjects were asked to carry out Test Method 3 described below.

[0108] The subjects for Test Method 3 were five male university students who exercised regularly, as in Test Method 2, and were prohibited from strenuous exercise on the day of the test. In addition, meals, excluding fluid intake, were restricted to two hours before the start of the test, and eating and drinking were prohibited during the test.

[0109] [Test Method 3] On the first day, the subjects were asked to wait in a quiet state for an appropriate period of time (referred to as "Initial 1"), after which they were asked to perform aerobic exercise (referred to as "AerE1") and anaerobic exercise (referred to as "AnaE1"). After this, they were asked to rest for 20 minutes (referred to as "Rest 1") while half-bathing in carbonated water adjusted to a temperature of 20 degrees.

[0110] On the second day, after checking the subjects' physical condition, they underwent high-intensity training, followed by a 20-minute rest period in a half-body bath in carbonated water adjusted to 20 degrees Celsius. On the third day, after checking the subjects' physical condition, they underwent high-intensity training, followed by a 20-minute rest period in a half-body bath in carbonated water adjusted to 20 degrees Celsius.

[0111] On the fourth day, after checking the subject's physical condition (referred to as "Initial 4"), the subject was asked to perform aerobic exercise (referred to as "Aer E4") and anaerobic exercise (referred to as "Ana E4"). After this, the subject was asked to rest for 20 minutes (referred to as "Rest 4") while half-bathing in carbonated water adjusted to a temperature of 20 degrees. The dissolved hydrogen concentration of the hydrogen carbonated water was 0.5 ppm, and the dissolved carbon dioxide concentration was 1000 ppm.

[0112] Blood samples were taken from the subjects on the first day at rest (Initial 1), after anaerobic exercise (AnaE1) and a half-body bath in bicarbonate water (Rest 1), and on the fourth day at a physical condition check (Initial 4), after anaerobic exercise (AnaE4) and a half-body bath in bicarbonate water (Rest 4), and the amount of active oxygen (·OH) was measured using an electron spin resonance device (ES series, JEOL). The amount of active oxygen was analyzed using the ESR spin trapping method. The amount of active oxygen was calculated as the average of the five subjects.

[0113] <Changes in reactive oxygen scavenging activity between the first and fourth days> Figure 9 shows the hydroxyl radical (·OH) scavenging activity in Test Method 3 on the first day in a resting state (Initial 1), after anaerobic exercise (AnaE1) and a half-body bath in bicarbonate water (Rest 1), and on the fourth day when checking the physical condition (Initial 4), after anaerobic exercise (AnaE4) and a half-body bath in bicarbonate water (Rest 4) (*p<0.05, **p<0.01).

[0114] As shown in Figure 9, the active oxygen scavenging activity after half-body bathing in hydrogen carbonated water on the fourth day (Rest 4) was significantly improved compared to the active oxygen scavenging activity after half-body bathing in hydrogen carbonated water on the first day (Rest 1). This shows that by bathing half-body in hydrogen carbonated water every day after exercise, active oxygen scavenging activity is improved even when exercising every day.

[0115] Furthermore, as shown in Figure 9, the hydroxyl radical (·OH) scavenging activity after anaerobic exercise (AnaE4) followed by a half-body bath in bicarbonate water (Rest4) was significantly improved compared to the hydroxyl radical (·OH) scavenging activity after anaerobic exercise (AnaE4) on the fourth day. This is a change in hydroxyl radical (·OH) scavenging activity that was not observed on the first day. This indicates that by performing a half-body bath in bicarbonate water every day after exercise, the active oxygen scavenging activity after a half-body bath in bicarbonate water after exercise on the day of exercise is improved more than the active oxygen scavenging activity after exercise. In other words, it was suggested that the damage to the body caused by active oxygen generated during daily exercise can be reduced by taking a half-body bath in hydrogen carbonated water every day after exercise.

[0116] Additionally, in Test Method 3, we investigated the correlation between the rate of change in hydroxyl radical (·OH) scavenging activity and the rate of change in maximum power during anaerobic exercise during the first day of anaerobic exercise (AnaE1) and the fourth day of anaerobic exercise (AnaE4). Figure 10 shows the rate of change in maximum power during anaerobic exercise relative to the rate of change in hydroxyl radical (·OH) scavenging activity for five subjects.

[0117] As described above, anaerobic exercise capacity was measured by measuring maximum power during anaerobic exercise ('AnaE1' and 'AnaE4') using a high-intensity anaerobic power ergometer (powermax V, Combi).

[0118] As shown in Figure 10, people with a greater rate of change in hydroxyl radical (·OH) scavenging activity tended to have improved maximum power during anaerobic exercise, even if they exercised every day. This suggests that improved hydroxyl radical (·OH) scavenging activity reduces biological damage, allowing people to fully demonstrate maximum power during subsequent anaerobic exercise.

[0119] In other words, half-body bathing in bicarbonate water after daily exercise tends to improve the scavenging activity of hydroxyl radicals (·OH) after the half-body bath (see Figure 9), so it can be expected that the maximum power during subsequent anaerobic exercise will be equivalent to that of the first day, or even be higher than that of the first day.

[0120] Thus, by taking a half-body bath in carbonated water after daily exercise, the hydroxyl radical (·OH) scavenging activity effect was improved on the fourth day. Therefore, by repeatedly taking a half-body bath in carbonated water after exercise, it is possible to improve the hydroxyl radical (·OH) scavenging activity and to maintain or improve performance even with daily exercise.

[0121] Therefore, even if you have consecutive games, immersing yourself in hydrogen carbonated water after exercise can help you recover from fatigue efficiently and maintain or improve your performance the next day. For example, immersing yourself in hydrogen carbonated water after exercise up until the day before a game (exercise day) can be expected to improve your performance in the game (exercise).

Claims

1. An icing method to be performed after exercise, comprising: The body is immersed in hydrogen carbonated water, which has high concentrations of dissolved carbon dioxide and hydrogen and whose temperature is adjusted to be between 10 and 25 degrees Celsius. The dissolved concentration of carbon dioxide in the hydrogen carbonated water is 260 ppm or more, The dissolved hydrogen concentration in the hydrogen carbonated water is adjusted to 0.1 ppm or more and 1.6 ppm or less, Immerse your body in the hydrogen carbonated water for 5 to 25 minutes. Icing methods (excluding medical procedures).

2. The dissolved concentration of carbon dioxide in the hydrogen carbonated water was adjusted to 600 ppm or more. The icing method according to claim 1 (excluding medical procedures).

3. The dissolved concentration of carbon dioxide in the hydrogen carbonated water was adjusted to 800 ppm or more and 1200 ppm or less. The icing method according to claim 1 (excluding medical procedures).

4. The dissolved hydrogen concentration in the hydrogen carbonated water was adjusted to 0.2 ppm or more. An icing method according to any one of claims 1 to 3 (excluding medical procedures).

5. The dissolved hydrogen concentration in the hydrogen carbonated water was adjusted to 0.4 ppm or more and 0.7 ppm or less. The icing method according to claim 4 (excluding medical procedures).

6. The temperature of the hydrogen carbonated water was adjusted to 15 to 22 degrees. An icing method according to any one of claims 1 to 5 (excluding medical procedures).

7. The icing method according to any one of claims 1 to 6 is also performed before exercise. Icing methods (excluding medical procedures).

8. In the icing method according to claim 7, The pre-exercise period is the day before the exercise day. Icing methods (excluding medical procedures).

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