Training system for gait adjustment and training method thereof

Abstract

The invention provides a gait adjustment training system and a training method thereof. The gait adjustment training system comprises a running platform device, a plantar pressure acquisition device, a video acquisition device, a multimedia device and a training master control device. The plantar pressure acquisition device is used for acquiring plantar ground contact pressure distribution information of the trainee; the video acquisition device is used for acquiring gait information of a trainee on the running platform device; the training master control device is electrically connected with the running platform device, the plantar pressure acquisition device, the video acquisition device and the multimedia device, and the training master control device is used for receiving and comparing plantar ground contact pressure distribution and gait actions with preset front and middle foot gaits and adjusting the running mode of the running platform device according to a comparison result. And sending the comparison result to the multimedia device to remind the trainee to adjust the training gait action. The front and middle foot training gait of the trainee is comprehensively analyzed and monitored by means of the plantar pressure acquisition device and the video acquisition device, the trainee is interactively reminded to correct the gait action, and the gait training effect is maximized.

Description

Technical Field

[0001] The invention relates to the technical field of sports training, and in particular provides a gait adjustment training system and a training method thereof. Background Art

[0002] Treadmill training is one of the most effective auxiliary training forms currently used by astronauts during flight. Since astronauts tend to land on their rear feet during training, it is easy to produce a strong peak load rate and step length, which makes it difficult to meet the biomechanical requirements of astronauts in terms of ground impact force, energy consumption, muscle strength, and hip, knee, and ankle dynamics in a weightless environment.

[0003] Therefore, it is necessary to enrich and supplement the astronauts' gait training, and adjust the astronauts' gait from the rear-foot landing gait to the front-mid-foot landing gait so as to meet the astronauts' physical index requirements.

[0004] However, the existing training auxiliary tools and methods are single and scattered, and the training process is complicated and requires human guidance. In addition, due to the different physical conditions of each person, the gait adjustment training cycle is long and the training effect is not ideal. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing astronauts' gait adjustment training effect of changing from rear foot landing gait to front midfoot landing gait is not good.

[0006] The purpose of the present invention is to adopt the following technical solutions to achieve:

[0007] The present invention provides a gait adjustment training system, which includes: a treadmill device; a plantar pressure collection device, which is used to collect the plantar contact pressure distribution of a trainee; a video collection device, which is used to collect the gait movement of the trainee on the treadmill device; a multimedia device; and a training master control device, which is electrically connected to the treadmill device, the plantar pressure collection device, the video collection device and the multimedia device respectively; the training master control device is used to receive and compare the plantar contact pressure distribution and the gait movement with a preset front midfoot gait, and adjust the operation mode of the treadmill device according to the comparison result, and send the comparison result to the multimedia device to remind the trainee to adjust the training gait movement.

[0008] Preferably, the treadmill device includes a horizontally arranged treadmill and a vertically arranged zero-gravity treadmill, and the treadmill and the zero-gravity treadmill are electrically connected to the training master control device respectively.

[0009] Preferably, the plantar pressure collection device comprises a plurality of pressure sensors arranged in an array, and the plurality of pressure sensors are mounted on the soles of the trainee or on the treadmill device.

[0010] Preferably, the training system further comprises a wearable device electrically connected to the training master control device, and the wearable device is worn or adhered to a limb of the trainee.

[0011] Preferably, the wearable device also includes a heart rate collector and a wireless inertial posture sensor, the heart rate collector is worn on the trainee's wrist, the wireless inertial posture sensor is worn or adhered to the trainee's lower limb joints, and the wireless inertial posture sensor is used to collect and capture the trainee's gait movements.

[0012] Preferably, the training master control device includes: an information receiving unit, which is used to receive the information of the plantar contact pressure distribution and the gait movement; an information processing unit, which is used to compare and process the information of the plantar contact pressure distribution and the gait movement with the information of the forefoot gait and obtain processing results; a multimedia output unit, which outputs the video and audio information of the processing results for the multimedia device; and a drive output unit, which outputs the information of the processing results for adjusting the running speed of the treadmill device.

[0013] Based on the same inventive concept, the present invention also provides a training method for the gait adjustment training system, including: obtaining the plantar contact pressure distribution and gait movements of the trainee in the training state; comparing the plantar contact pressure distribution and the gait movements with the preset front midfoot gait respectively; and determining whether to adjust the running speed of the treadmill device and send a prompt message to remind the trainee to adjust the foot training gait movement according to the comparison result.

[0014] Preferably, "comparing the plantar contact pressure distribution and the gait movement with the preset forefoot gait respectively" specifically includes: comparing the pressure-bearing positions of multiple pressure sensors obtained by the plantar pressure acquisition device with the contact shape of the preset forefoot gait; the video acquisition device obtains the inclination angle between the sole surface and the landing surface before it touches the ground and compares the inclination angle with the contact angle of the preset forefoot gait.

[0015] Preferably, "determining whether to adjust the running speed of the treadmill device and sending a prompt message to remind the trainee to adjust the foot training gait based on the comparison result" specifically includes: obtaining the proportion value of the number of the pressure sensors that feedback the pressure value in the ground contact shape within the set training time; if the proportion value is lower than the set proportion threshold, sending a training reminder message and reducing the running speed of the treadmill device.

[0016] Preferably, "determining whether to adjust the running speed of the treadmill device and sending a prompt message to remind the trainee to adjust the foot training gait based on the comparison result" specifically includes: obtaining the frequency of the inclination angle being greater than the landing angle of the preset front midfoot gait within the set training time; if the frequency is greater than the set frequency threshold, sending a training reminder message and reducing the running speed of the treadmill device.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The gait adjustment training system provided by the present invention includes a treadmill device, a plantar pressure collection device, a video collection device, a multimedia device and a training master control device. Among them, the plantar pressure collection device is used to collect the plantar contact pressure distribution information of the trainee; the video collection device is used to collect the gait information of the trainee on the treadmill device; the training master control device is electrically connected to the treadmill device, the plantar pressure collection device, the video collection device and the multimedia device respectively, and the training master control device is used to receive and compare the plantar contact pressure distribution and gait movement with the preset front midfoot gait, and adjust the operation mode of the treadmill device according to the comparison result, and send the comparison result to the multimedia device to remind the trainee to adjust the training gait movement. Through such a setting, the training system of the present invention uses the plantar pressure collection device and the video collection device to comprehensively analyze and monitor the front midfoot training gait of the trainee, interactively remind the trainee to correct the gait movement, improve the training comfort of the trainee, maximize the gait training effect, and shorten the gait training adjustment cycle. The device has a simple structure, a high degree of automation, and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of the training system for gait adjustment of the present invention;

[0020] Figure 2 A schematic diagram of the detailed structural relationship of the training system for gait adjustment of the present invention;

[0021] Figure 3 To train trainees to map the heel strike pressure during gait;

[0022] Figure 4 To train the trainees to map the front midfoot landing pressure during gait;

[0023] Figure 5 Comparison of the trainees' initial landing joint angles before and after training on a zero-gravity treadmill;

[0024] Figure 6 Comparison of the joint angles at initial landing of trainees before and after training on a horizontal treadmill. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0026] It should be noted that, in the description of the present invention, terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0027] Example 1

[0028] like Figure 1 As shown, the gait adjustment training system of the embodiment of the present invention includes a treadmill device 1, a plantar pressure collection device 2, a video collection device 3, a multimedia device 4 and a training master control device 5. The treadmill device 1, the plantar pressure collection device 2, the video collection device 3, the multimedia device 4 and the training master control device 5 are electrically connected.

[0029] Specifically, the multimedia device 4 in the embodiment of the present invention includes a large screen and a speaker in the training ground, and the treadmill device 1 is located in front of the large screen for the trainee 7 to watch. The treadmill device 1 includes a horizontally arranged treadmill and a vertically arranged zero-gravity treadmill. The treadmill and the zero-gravity treadmill are both equipped with a plantar pressure acquisition device 2, and the plantar pressure acquisition device 2 includes a plurality of array-arranged pressure sensors to monitor the pressure distribution of the sole of the foot touching the ground. The pressure sensors are installed on the treadmill and the zero-gravity treadmill, or the pressure sensors are installed on the soles of the trainees 7. The video acquisition device 3 is a plurality of cameras, each of which is respectively arranged toward the treadmill and the zero-gravity treadmill to monitor the motion state of the trainee 7. It should be noted that the camera can focus on the lower limb area of ​​the trainee 7 to monitor the motion gait of the trainee 7. Specifically, the camera can clearly obtain the shoe motion state of the foot area of ​​the trainee 7.

[0030] The training system of the embodiment of the present invention further includes a wearable device 6, which is wirelessly connected to the training master control device 5. Specifically, the wearable device 6 includes a wireless inertial attitude sensor and a heart rate collector. The wireless inertial attitude sensor is worn or attached to the lower limbs or joints of the trainee 7 to more clearly capture the movement gait of the trainee's 7 calf and foot. Among them, the heart rate collector can be configured as a bracelet worn on the wrist of the trainee 7.

[0031] It should be noted that, according to practical applications, those skilled in the art can also integrate functions such as a timer, a counter, and the collection of physiological parameters on the wristband to meet the actual training needs of the trainee 7.

[0032] like Figure 2 As shown, the training master control device 5 in the embodiment of the present invention includes an information receiving unit 51 , an information processing unit 52 , a multimedia output unit 53 and a drive output unit 54 .

[0033] The information receiving unit 51 is used to receive information about the plantar contact pressure distribution and gait movements of the trainee 7. In addition, the information receiving unit 51 can also receive information from smart input terminals such as mobile phones, tablets, and computers connected to the training master control device 5.

[0034] In addition, the information receiving unit 51 can also receive data information from the wearable device 6 and input the trainee's 7 personal parameters, training program selection and training duration.

[0035] The information processing unit 52 is used to compare and process the information of the plantar contact pressure distribution and the gait movement with the preset forefoot gait information and obtain the processing result.

[0036] Specifically, by judging whether the pressure-bearing position of the pressure sensor is within the ground contact shape, it is judged whether the trainee's 7 foot contact falls within the preset front midfoot contact area, and by comparing the inclination angle between the sole surface and the landing ground before it touches the ground with the preset front midfoot gait landing angle, it is predicted whether the trainee's 7 foot contact gait is standard.

[0037] The multimedia output unit 53 outputs the video and audio information for the multimedia device 4 among the processing results.

[0038] Specifically, the video information in the above-mentioned processed information is transmitted to the large screen through the output unit of the multimedia device 4, and the audio information is transmitted to the speaker through the output unit of the multimedia device 4.

[0039] The drive output unit 54 outputs information for adjusting the running speed of the treadmill device 1 among the processing results.

[0040] Specifically, the drive output unit 54 adjusts the running speed of the treadmill and the zero-gravity treadmill according to the processing results so that the trainee 7 can adjust his or her personal gait. The drive output unit 54 can also adjust the running speed of the treadmill and the zero-gravity treadmill according to the user's personal automatic state and flexibly set the output.

[0041] When the trainee 7 inputs personal information and selects a training program, the training master control device 5 drives the treadmill to enter a running state so that the trainee 7 can perform gait correction training.

[0042] like Figure 3 As shown in the figure, A is the left foot and B is the right foot. During the training process, if the plantar contact pressure distribution of the trainee 7 does not fall within the preset front midfoot contact area, or the inclination angle of the trainee 7 before the plantar contact exceeds the set value, the user is reminded to correct the training gait and adjust to slow down the running speed of the treadmill or zero-gravity treadmill through the large multimedia screen and speakers.

[0043] like Figure 4 As shown in the figure, A is the left foot and B is the right foot. If the plantar contact pressure distribution of the trainee 7 falls within the preset front midfoot contact area, or the plantar contact inclination angle of the trainee 7 does not exceed the set value, and the training time of the set duration is reached, the training master control device 5 sends a training qualification message and stops the operation of the treadmill or zero-gravity treadmill to end the training.

[0044] It should be noted that the large screen also displays a standard simulated gait decomposition animation for the trainee 7 to refer to and adjust his gait movements. In addition, the inclination angle before the sole touches the ground can also be measured with a wireless inertial attitude sensor to improve the analysis accuracy.

[0045] Through such a setting, the training system of the present invention comprehensively analyzes the front and midfoot training gait of the trainee 7 with the help of the plantar pressure acquisition device 2 and the video acquisition device 3, interactively reminds the trainee 7 to correct the gait movement, improves the training comfort of the trainee 7, maximizes the gait training effect, and shortens the gait training adjustment cycle. The device has a simple structure, a high degree of automation, and a wide range of applications.

[0046] Example 2

[0047] Based on the same inventive concept, the present invention also provides a training method using the gait adjustment training system described in Example 1, the training method comprising:

[0048] S1, obtaining the plantar contact pressure distribution and gait movements of the trainee 7 in the training state;

[0049] S2, comparing the plantar contact pressure distribution and gait movements with the preset forefoot gait;

[0050] S3. According to the comparison result, determine whether to adjust the running speed of the treadmill device 1 and send a prompt message to remind the trainee 7 to adjust the foot training gait.

[0051] It can be understood that, on the one hand, the actual ground contact gait of the trainee 7 is judged by whether the sole contact pressure distribution falls into the preset front midfoot contact area, and on the other hand, the inclination angle between the sole surface and the contact surface before contacting the ground is used to predict whether the trainee 7 has a standard ground contact gait, thereby reminding the trainee 7 and adjusting the running speed of the treadmill device 1, so that the trainee 7 can adjust his gait movement in time according to his own situation.

[0052] Step S2 specifically includes:

[0053] S21, comparing the pressure-bearing positions of the multiple pressure sensors acquired by the plantar pressure acquisition device 2 with the ground contact shape of the preset front midfoot gait;

[0054] S22. The video acquisition device 3 obtains the inclination angle between the sole surface and the landing surface before the sole surface touches the ground, and compares the inclination angle with the landing angle of the preset front midfoot gait.

[0055] It can be understood that, the more pressure sensors that provide feedback within the preset front midfoot gait contact shape, the closer the trainee's 7 gait movement is to the front midfoot landing. The vertical distance is set before the sole touches the ground, and the trainee's 7 actual gait is predicted in advance based on the inclination angle of the sole before landing to see whether it is in line with the front midfoot landing gait.

[0056] Specifically, step S3 includes:

[0057] S31, obtaining a ratio of the number of pressure sensors that feedback pressure values ​​within a ground contact shape within a set training time;

[0058] S32: If the proportion value is lower than the set proportion threshold, a training reminder message is sent and the running speed of the treadmill device 1 is reduced.

[0059] S33, obtaining the frequency of the tilt angle being greater than the preset landing angle of the front midfoot gait within the set training time;

[0060] S34: If the frequency is greater than the set frequency threshold, a training reminder message is sent and the running speed of the treadmill device 1 is reduced.

[0061] For example, the vertical distance is 7-10 cm, the number of pressure sensors in the ground contact shape of the front midfoot gait is preset to 50, the threshold is set to 40, and when the number of pressure feedbacks from the pressure sensors in the ground contact shape reaches 40, it is recorded as a valid ground contact gait; otherwise, it is recorded as an invalid ground contact gait. The proportion of the number of valid ground contact gaits to the total number of steps in the set training time is calculated.

[0062] If the proportion value is lower than the set proportion threshold, a training reminder message is sent and the running speed of the treadmill device 1 is reduced.

[0063] If the proportion value is not lower than the set proportion threshold, the running speed of the treadmill device 1 is kept unchanged and the proportion value information is displayed on the large screen.

[0064] The landing angle of the front midfoot gait is preset to be 10°. If the inclination angle of the trainee 7 before the sole touches the ground is not greater than 10°, it is recorded as an invalid gait; otherwise, it is recorded as a valid gait;

[0065] Calculate the frequency of the tilt angle being greater than the preset front midfoot gait landing angle within the set training time;

[0066] If the frequency is greater than the set frequency threshold, a training reminder message is sent and the running speed of the treadmill device 1 is reduced.

[0067] If the frequency is not greater than the set frequency threshold, the running speed of the treadmill device 1 is kept unchanged and the frequency information is displayed on the large screen.

[0068] In addition, before conducting gait adjustment training, the trainee 7 can connect a smart device such as a mobile phone or a tablet computer as an input module to the training master control device 5, and then enter his or her personal parameters on the smart device, select a set training plan, and set the expected training time according to his or her actual physical fitness.

[0069] The training master control device 5 drives the treadmill to start running at a preset speed according to the training program selected by the trainee 7 until the speed corresponding to the training program is reached, so that the trainee 7 can gradually adapt to the training program.

[0070] In addition, during the running process of the trainee 7, parameter information such as the number of steps, training time and heart rate value of the trainee 7 is displayed in real time.

[0071] It should be noted that the number of pressure sensors, landing angle, vertical distance and threshold value mentioned above are only for illustrating the working process and principle of the method, and are not limitations of the present invention. Those skilled in the art can flexibly adjust the above parameter values ​​according to actual applications.

[0072] Gait training outcome test

[0073] 12 trainees were used for gait correction training. Among them, the trainees' age: 21±1.8, height: 176.7±4.3cm, weight: 68.92±5.45kg. The trainees all adopted a running posture with the rear foot touching the ground, and the trainees had no Achilles tendon or calf injury within 6 months before training. Among them, the following test results are the average values ​​of the 12 trainees. The trainees adopted the gait adjustment training system of Example 1 of the present invention and the training method in Example 2. The training cycle was set to 4 weeks, with 6 training days per week and 30-45 minutes of training per day. Among them, the treadmill is 10-20 minutes, and the zero-gravity treadmill is 20-25 minutes.

[0074] The specific test results are as follows:

[0075] 1. Muscle strength test

[0076] BIODEX was used to perform isokinetic muscle strength tests of knee / ankle flexion and extension, ankle inversion / eversion, and maximum voluntary isometric contraction tests.

[0077] a. Isokinetic muscle strength test

[0078] Table 1

[0079]

[0080] Table 1 is a comparative analysis of the isokinetic strength of the lower limb muscles before and after training. After training, the peak torques in all directions of the hip and knee increased in the isokinetic strength test. It was calculated that knee flexion increased by 26.55%, knee extension increased by 19.34%, ankle plantar flexion increased by 42.24%, ankle extension increased by 39.46%, ankle inversion increased by 39.84%, and ankle eversion increased by 49.49%, all of which were statistically significant (P<0.05).

[0081] b. Isometric muscle strength test

[0082] Table 2

[0083]

[0084] Table 2 is a comparative analysis of the isometric strength of the lower limb muscles before and after training. After training, the peak torque of the maximum isometric contraction test increased. It was calculated that the knee extension increased by 20.42%, the ankle plantar flexion increased by 43.01%, and the ankle dorsiflexion increased by 24.15%, all of which were statistically significant (P<0.05).

[0085] 2. Achilles tendon mechanical indicators

[0086] Achilles tendon cross-sectional area measurement: Ultrasound diagnostic equipment was used with a linear array probe, and the measurement site was 5 cm above the calcaneal tuberosity.

[0087] Achilles tendon elastic modulus and stiffness measurement: First, the initial length L0 (mm) of the Achilles tendon was measured using an ultrasonic diagnostic instrument. The upper end of the measurement started from the soleus tendon junction and the lower end ended at the calcaneal tuberosity. Secondly, the torque of the force on the Achilles tendon at the ankle joint and the change in Achilles tendon length were measured. Using the BIODEX isokinetic tester training system, the subjects sat on the test bench with the hip and knee flexed, the ankle joint in a neutral position, and the upper body fixed. The subjects performed a 20-second maximum voluntary isometric contraction (MVC) of the ankle flexor muscle force, and the torque (TQ) of the right triceps surae during isometric contraction was measured. At the same time, the displacement (ΔL) of the proximal bundle of the Achilles tendon was measured using an ultrasonic diagnostic instrument.

[0088] Next, measure the moment arm (MA) at the ankle joint: the vertical distance from the center of the talus to the Achilles tendon. The formula for calculating the elastic modulus and stiffness of the Achilles tendon is as follows:

[0089] ① Achilles tendon force (FAT) ≈ Fmus = TQ / MA, where TQ is plantar flexion moment and MA is Achilles tendon force arm; ②

[0090] Achilles tendon stress σ = FAT / CSA, where CSA is the cross-sectional area of ​​the Achilles tendon;

[0091] ③Achilles tendon strain ε = ΔL / L0, where ΔL is the displacement of the proximal bundle of the Achilles tendon and L0 is the resting length of the Achilles tendon;

[0092] ④ Elastic modulus E = σ / ε,

[0093] ⑤ Stiffness calculation formula: K = FAT / ΔL.

[0094] The elastic modulus and stiffness of each trainee were averaged three times.

[0095] Table 3

[0096] Before training After training t P Elastic modulus (MPa) 432.32±37.76 572.49±56.86 -2.926 P＝0.013 Stiffness(N / mm) 283.13±24.95 392.76±46.08 -3.204 P＝0.008 Achilles tendon cross-sectional area (mm2) 46.69±6.07 55.54±4.86 -8.065 P＜0.01

[0097] Table 3 is a comparative analysis table of the elastic modulus and stiffness of the Achilles tendon before and after training. After training, the Achilles tendon has a good adaptability. It is calculated that the elastic modulus of the Achilles tendon increased by 32.42%, the stiffness increased by 38.72%, and the cross-sectional area of ​​the Achilles tendon increased by 18.95% before and after training. The elastic modulus before training is 432.32±37.76MPa, and the elastic modulus after training is 572.49±56.86MPa, P is 0.013, P<0.05, and there is a significant difference. The stiffness before training is 283.13±24.95N / mm, and the stiffness after training is 392.76±46.08N / mm, P value is 0.008, P<0.05, and there is a significant difference. The above Tables 1-3 use paired t test to compare the differences before training. t is the statistic calculated by the paired t test method, P is the significant parameter, P<0.05, and the difference is statistically significant.

[0098] 3. Test of foot landing characteristics changes

[0099] Before and after training, the trainees performed gait training on a horizontal treadmill (1G) and a zero-gravity treadmill (0G) at speeds of 8km / h and 12km / h, respectively.

[0100] Table 4

[0101]

[0102] a*: 0G Vs.1G, p<0.05;

[0103] b*: 8km / h Vs.12km / h, p<0.05;

[0104] c*: RFS Vs. FFS, p < 0.05;

[0105] RFS: rear foot strike, FFS: forefoot strike.

[0106] Table 4 is a comparison table of basic gait parameters under different landing modes (Mean±SD). After training, the trainees' step frequency, step length, swing phase ratio, vertical displacement of the center of gravity and other indicators were affected to varying degrees by speed, gravity level and landing mode. With the increase of speed, the step frequency and swing phase ratio increased, and the vertical displacement of the center of gravity decreased (p<0.05); in addition, the step frequency, swing phase ratio and vertical displacement of the center of gravity were affected by the gravity level. Compared with running under normal gravity, running in a simulated weightless environment reduced the step frequency, and the swing phase ratio and vertical displacement of the center of gravity increased (p<0.05); different landing modes had a significant effect on step length and vertical displacement of the center of gravity. Compared with landing on the front midfoot (after training), landing on the rear foot (before training), the step length and vertical displacement of the center of gravity decreased (p<0.05).

[0107] 4. Joint Angle Test at Initial Touchdown

[0108] like Figure 5 and Figure 6 As shown in the figure, pre is before training, and trained is after training. By obtaining the joint angles of the trainees under different foot landing methods before and after training, no matter running under normal gravity or running in simulated weightlessness, at the initial landing, the forefoot landing (FFS) mode has a larger ankle dorsiflexion angle and a smaller hip flexion angle than the rearfoot landing (RFS) mode (p<0.05), while the knee joint angle did not change significantly when touching the ground.

[0109] Table 5

[0110]

[0111] a*: 0G Vs.1G, p<0.05;

[0112] b*: 8km / h Vs.12km / h, p<0.05;

[0113] c*: RFS Vs. FFS, p < 0.05;

[0114] RFS: rear foot strike, FFS: forefoot strike.

[0115] Table 5 shows the changes in joint angles (Mean±SD) under different landing methods. Comparison shows that different gravity levels mainly affect knee joint activity. Under simulated weightlessness, knee joint activity is significantly reduced (p<0.05). Speed ​​has a greater impact on hip, knee, and ankle activities. The greater the speed, the greater the hip joint activity, hip extension peak, ankle joint activity, and ankle plantar flexion (p<0.05), and the smaller the ankle dorsiflexion (p<0.05). Different foot landing characteristics mainly affect ankle and hip joint activities, and there is no significant difference in the impact on the knee joint. Compared with the rear foot landing, the front midfoot landing method has a smaller hip joint activity and hip extension peak (p<0.05), a larger ankle plantar flexion and dorsiflexion (p<0.05), and an increasing trend in ankle joint activity. From the perspective of angular velocity changes, whether in the ground state or in the simulated weightlessness state, when the forefoot lands, in the middle of the stance phase and in the middle of the flight phase, the angular velocity of the hip joint is significantly reduced compared with when the hindfoot lands, while the angular velocity of the ankle joint is significantly increased during the entire stance phase compared with when the hindfoot lands, and there is no obvious change in the angular velocity of the knee joint.

[0116] 5. Ground reaction force test

[0117] Table 6

[0118]

[0119] a*: 0G Vs.1G, p<0.05;

[0120] b*: 8km / h Vs.12km / h, p<0.05;

[0121] c*: RFS Vs. FFS, p < 0.05;

[0122] *: RFS Vs. FFS at the same gravity and speed, p < 0.05;

[0123] RFS: rear foot strike, FFS: forefoot strike.

[0124] Table 6 shows the changes in ground reaction force indicators (Mean±SD) for different landing methods, among which gravity level and speed have a significant effect on ground reaction force. The ground peak reaction force, impulse, and loading rate all increase with the increase of gravity level and speed (p<0.05).

[0125] The ground reaction force curves in the gait cycle were slightly different under different landing modes. When the trainees landed on the rear foot, the plantar pressure curve showed a double peak; when they landed on the front midfoot, the plantar pressure curve showed a single peak. Overall, different landing modes had no significant effect on the peak value of ground reaction force, but the plantar pressure peak value of the front midfoot landing at each speed under simulated weightlessness was slightly larger than that of the rear foot landing. The peak value of the ground reaction force of the front midfoot landing at 8 km / h was 1.3±0.2 times the body weight, and that of the rear foot landing was 1.1±0.3 times the body weight. The post hoc test showed that the difference was statistically significant, but this trend was not observed in running under normal gravity. In addition, different landing modes also had a certain effect on the loading rate. Under normal gravity, the acceleration rate of the front midfoot landing at each speed was slightly lower than that of the rear foot landing, and the difference was statistically significant at 12 km / h; under simulated weightlessness, the individual difference of this difference increased, and the loading rate difference was not statistically significant.

[0126] 6. Lower limb joint torque and compliance index test

[0127] Table 7

[0128]

[0129]

[0130] a*: 0G Vs.1G, p<0.05;

[0131] b*: 8km / h Vs.12km / h, p<0.05;

[0132] c*: RFS Vs. FFS, p < 0.05;

[0133] RFS: rear foot strike, FFS: forefoot strike.

[0134] Table 7 shows the changes in lower limb compliance indicators (Mean±SD) for different landing methods. The lower limb hip, knee, and ankle joint torques were obtained by inverse dynamics, and the corresponding joint stiffness was calculated. With the increase of speed and gravity, the lower limb joint torque increased significantly (p<0.05).

[0135] When three-way repeated measures analysis of variance was used to compare the effects of gravity, speed and landing mode on torque and stiffness, it was found that the landing mode had a significant effect on the hip joint torque as a whole. Whether running under normal gravity or running under simulated weightlessness, the maximum hip joint torque when the forefoot landed was significantly lower than that when the hindfoot landed (p < 0.05). For the ankle joint, the maximum joint torque when the forefoot landed was significantly increased compared with that when the hindfoot landed in the simulated weightlessness state (p < 0.05), but this difference was not observed under normal gravity. The knee joint torque was the opposite. No difference was found between the forefoot and hindfoot landing under simulated weightlessness, but the knee joint torque was significantly reduced when the forefoot landed was significantly reduced compared with that when the hindfoot landed in normal gravity (p < 0.05).

[0136] In addition, the changes in joint stiffness show that the landing method has a significant effect on the stiffness of the knee and ankle joints. Whether in normal gravity or simulated weightlessness, the stiffness of the knee and ankle joints is significantly reduced when the front midfoot lands (p < 0.05). For the stiffness of the hip joint, the landing method has different effects under different gravity. In the simulated weightlessness state, the stiffness of the hip joint when the front midfoot lands is significantly increased compared with the hindfoot (p < 0.05), while different landing methods under normal gravity have no effect on it.

[0137] Table 8

[0138]

[0139]

[0140] a*: 0G Vs.1G, p<0.05;

[0141] b*: 8km / h Vs.12km / h, p<0.05;

[0142] c*: RFS Vs. FFS, p < 0.05;

[0143] RFS: rear foot strike, FFS: forefoot strike.

[0144] Table 8 shows the changes in joint torque and muscle force indices (Mean±SD) for different landing methods. By comparison, it can be seen that when the rearfoot landing is compared with the front midfoot landing after training, the muscle force in different positions changes significantly with gait training, that is, the gait adjustment training effect of the front midfoot landing is more significant.

[0145] In summary, compared with traditional training methods, by adopting the gait adjustment training system and training method of the present invention, trainees can master the training movements of the forefoot and midfoot gait within a shorter training period, and the trainees' relevant physical indicators change significantly, achieving an ideal training effect.

[0146] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A gait adjustment training system, characterized in that: include: Treadmill device (1); A plantar pressure collection device (2) for collecting the plantar contact pressure distribution of a trainee (7); A video acquisition device (3) for acquiring gait movements of the trainee (7) on the treadmill device (1); Multimedia device (4); and A training master control device (5), which is electrically connected to the treadmill device (1), the plantar pressure collection device (2), the video collection device (3) and the multimedia device (4) respectively; The training master control device (5) is used to receive and compare the plantar contact pressure distribution and the gait movement with a preset front midfoot gait, and adjust the operation mode of the treadmill device (1) according to the comparison result, and send the comparison result to the multimedia device (4) to remind the trainee (7) to adjust the training gait movement.

2. The gait adjustment training system according to claim 1, characterized in that: The treadmill device (1) comprises a horizontally arranged treadmill and a vertically arranged zero-gravity treadmill, and the treadmill and the zero-gravity treadmill are electrically connected to the training master control device (5) respectively.

3. The gait adjustment training system according to claim 1, characterized in that The plantar pressure collection device (2) comprises a plurality of pressure sensors arranged in an array, and the plurality of pressure sensors are mounted on the soles of the trainees (7) or on the treadmill device (1).

4. The gait adjustment training system according to claim 1, characterized in that: The training system further comprises a wearable device (6) electrically connected to the training master control device (5), wherein the wearable device (6) is worn or adhered to a limb of the trainee (7).

5. The gait adjustment training system according to claim 4, characterized in that: The wearable device (6) further comprises a heart rate collector and a wireless inertial posture sensor, wherein the heart rate collector is worn on the wrist of the trainee (7), and the wireless inertial posture sensor is worn or attached to the lower limb joint of the trainee (7), and the wireless inertial posture sensor is used to collect and capture the gait movements of the trainee (7).

6. The gait adjustment training system according to claim 1, characterized in that: The training master control device (5) comprises: An information receiving unit (51) for receiving information on the distribution of the sole contact pressure and the gait movement; An information processing unit (52) is used to compare the information of the sole contact pressure distribution and the gait movement with the information of the front midfoot gait and obtain a processing result; a multimedia output unit (53) for outputting video and audio information of the multimedia device (4) in the processing result; and A drive output unit (54) outputs information in the processing result for adjusting the running speed of the treadmill device (1).

7. A training method for a gait adjustment training system according to any one of claims 1 to 6, characterized in that: include: obtaining the plantar contact pressure distribution and gait movements of the trainee (7) in a training state; comparing the plantar contact pressure distribution and the gait movement with a preset forefoot gait; According to the comparison result, it is determined whether to adjust the running speed of the treadmill device (1) and send a prompt message to remind the trainee (7) to adjust the foot training gait movement.

8. The training method of the gait adjustment training system according to claim 7, characterized in that: “Comparing the plantar contact pressure distribution and the gait movement with the preset forefoot gait” specifically includes: comparing the pressure-bearing positions of the plurality of pressure sensors acquired by the plantar pressure acquisition device (2) with the ground contact shape of the preset front midfoot gait; The video acquisition device (3) acquires the inclination angle between the sole surface and the ground surface before it touches the ground, and compares the inclination angle with the landing angle of the preset front midfoot gait.

9. The training method of the gait adjustment training system according to claim 8, characterized in that: The steps of "determining whether to adjust the running speed of the treadmill device (1) and sending a prompt message to remind the trainee (7) to adjust the foot training gait according to the comparison result" specifically include: Obtaining a ratio of the number of the pressure sensors that feedback pressure values ​​within the ground contact shape within a set training time; If the proportion value is lower than a set proportion threshold, a training reminder message is sent and the running speed of the treadmill device (1) is reduced.

10. The training method of the gait adjustment training system according to claim 8, characterized in that: The steps of "determining whether to adjust the running speed of the treadmill device (1) and sending a prompt message to remind the trainee (7) to adjust the foot training gait according to the comparison result" specifically include: Obtaining the frequency of the tilt angle being greater than the preset landing angle of the front midfoot gait within a set training time; If the frequency is greater than a set frequency threshold, a training reminder message is sent and the running speed of the treadmill device (1) is reduced.

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