A heart rate-based method and system for monitoring physiological load of physical activity of young children

Abstract

This invention discloses a method and system for monitoring the physiological load of preschool children's physical activities based on heart rate. The method includes: acquiring individual physiological parameters of the preschool children; determining an individualized dynamic heart rate threshold for the preschool children based on the individual physiological parameters; collecting the instantaneous heart rate of the preschool children during physical activities in real time; determining an instantaneous heart rate offset based on the individualized dynamic heart rate threshold and the instantaneous heart rate of the corresponding preschool children during physical activities; traversing the entire physical activity time of the corresponding preschool children to determine a set of instantaneous heart rate offsets; accumulating the values ​​in the instantaneous heart rate offset set to obtain the physiological load index of the corresponding preschool children during physical activities; and triggering an early warning message if the physiological load index of the corresponding preschool children during physical activities is greater than a preset load index threshold. This invention achieves accurate quantification and risk warning of preschool children's exercise load through the cumulative calculation of individualized dynamic heart rate thresholds and real-time heart rate offsets.

Description

Technical Field

[0001] This invention relates to the field of early childhood health monitoring technology, and more specifically, to a method and system for monitoring the physiological load of early childhood physical activities based on heart rate. Background Technology

[0002] Currently, the physical activity load for young children relies heavily on teachers' subjective judgment, lacking individualized and quantitative physiological indicator monitoring. Traditional heart rate monitoring methods often use fixed thresholds, failing to consider individual differences such as children's age and resting heart rate, resulting in inaccurate load assessment and an inability to scientifically guide the adjustment of physical activity intensity. Summary of the Invention

[0003] To address at least one of the aforementioned technical problems, the present invention aims to provide a method and system for monitoring the physiological load of preschool children's physical activities based on heart rate. By cumulatively calculating individualized dynamic heart rate thresholds and real-time heart rate deviations, the method achieves accurate quantification and risk warning of preschool children's exercise load.

[0004] The first aspect of this invention provides a method for monitoring the physiological load of physical activities in young children based on heart rate, comprising: Obtain individual physiological parameters of the child, including age and resting heart rate; Based on the individual physiological parameters, determine the child's individualized dynamic heart rate threshold; Real-time collection of children's instantaneous heart rate during physical activities; Based on the individualized dynamic heart rate threshold and the corresponding instantaneous heart rate of the child during physical activity, the instantaneous heart rate offset is determined; Iterate through the entire physical activity time of the corresponding child to determine the set of instantaneous heart rate offsets; The values ​​in the instantaneous heart rate offset set are summed to obtain the physiological load index of the corresponding child during physical activity; If the physiological load index of a child during physical activity exceeds the preset load index threshold, an early warning message will be triggered.

[0005] In this solution, the step of determining the individualized dynamic heart rate threshold for the infant based on the individual physiological parameters specifically includes: Determine the maximum heart rate of the child based on their age in the individual's physiological parameters; The heart rate difference is obtained by subtracting the corresponding resting heart rate from the child's maximum heart rate. Multiply the heart rate difference by the corresponding adjustment factor to obtain the current individualized dynamic heart rate adjustment value for the child. The child's current resting heart rate and individualized dynamic heart rate adjustment value are summed to obtain the child's individualized dynamic heart rate threshold.

[0006] In this solution, the formula for obtaining the instantaneous heart rate offset is as follows: ,in This indicates the instantaneous heart rate deviation. Represents the instantaneous heart rate at time t. This indicates the child's individualized dynamic heart rate threshold.

[0007] This plan also includes: Obtain the types of physical activities for young children; Determine the exercise intensity factor for each type of early childhood physical activity; The instantaneous heart rate offset is revised based on the exercise intensity factor of the aforementioned children's physical activity. Let the revised instantaneous heart rate offset be... Its formula is: ;in This represents the exercise intensity factor corresponding to the physical activities of young children.

[0008] In this scheme, the load index threshold is dynamically set based on the child's age and resting heart rate, and the formula is as follows: ,in This represents the load index threshold, where 'a' represents the age adjustment factor. This indicates the maximum heart rate of the corresponding infant. The value represents the resting heart rate, and T represents the total duration of the corresponding physical activity; "*" represents a multiplication operation.

[0009] In this solution, triggering the early warning message also includes: When a child's physiological load index exceeds the preset load index threshold for the first time during physical activity, the preset emotional protection window is activated. Based on a preset emotional protection window, the physical activities of the children are not interrupted; When the preset emotional protection window period ends, if the physiological load index of the child during physical activity is still greater than the preset load index threshold, forced interference information is generated, and a corresponding alternative activity plan is generated and sent to the preset management terminal for display.

[0010] In this solution, the formula for obtaining the preset emotional protection window period is as follows: ,in This indicates a pre-defined window of emotional protection. Indicates the base window duration. Indicates the attenuation coefficient. This indicates the physiological load index of young children during physical activities. This indicates the preset load index threshold.

[0011] A second aspect of the present invention provides a heart rate-based physiological load monitoring system for preschool physical activity, comprising a memory and a processor. The memory stores a heart rate-based method program for monitoring the physiological load of preschool physical activity, which, when executed by the processor, performs the following steps: Obtain individual physiological parameters of the child, including age and resting heart rate; Based on the individual physiological parameters, determine the child's individualized dynamic heart rate threshold; Real-time collection of children's instantaneous heart rate during physical activities; Based on the individualized dynamic heart rate threshold and the corresponding instantaneous heart rate of the child during physical activity, the instantaneous heart rate offset is determined; Iterate through the entire physical activity time of the corresponding child to determine the set of instantaneous heart rate offsets; The values ​​in the instantaneous heart rate offset set are summed to obtain the physiological load index of the corresponding child during physical activity; If the physiological load index of a child during physical activity exceeds the preset load index threshold, an early warning message will be triggered.

[0012] In this solution, the step of determining the individualized dynamic heart rate threshold for the infant based on the individual physiological parameters specifically includes: Determine the maximum heart rate of the child based on their age in the individual's physiological parameters; The heart rate difference is obtained by subtracting the corresponding resting heart rate from the child's maximum heart rate. Multiply the heart rate difference by the corresponding adjustment factor to obtain the current individualized dynamic heart rate adjustment value for the child. The child's current resting heart rate and individualized dynamic heart rate adjustment value are summed to obtain the child's individualized dynamic heart rate threshold.

[0013] In this solution, the formula for obtaining the instantaneous heart rate offset is as follows: ,in This indicates the instantaneous heart rate deviation. Represents the instantaneous heart rate at time t. This indicates the child's individualized dynamic heart rate threshold. One or more technical solutions proposed in this application have at least the following technical effects: 1. By integrating multiple individual parameters such as age, resting heart rate, and even BMI, a unique dynamic heart rate threshold and load index threshold are generated for each child, so that the assessment benchmark matches each child's physiological development level and basic physical fitness. 2. It overcomes the limitations of focusing only on peak or average heart rate, and combines exercise intensity with time through the concept of integration, using the "physiological load index" to quantify the total physiological stimulation of the entire class or a certain activity phase; 3. The introduction of an "emotional protection window" avoids teachers hastily interrupting children's play due to mechanical alarms from the system, greatly protecting children's enthusiasm for movement and the continuity of the class; In summary, this invention provides a basis for making early childhood physical activities more scientific, professional, and humane through multiple aspects such as precise assessment, intelligent early warning, and emotional protection window period. It maximizes the educational value and joyful experience of physical activities while ensuring the safety and health of children. Attached Figure Description

[0014] Figure 1 A flowchart of a method for monitoring the physiological load of preschool children's physical activities based on heart rate is shown in the present invention. Figure 2 A block diagram of a heart rate-based physiological load monitoring system for preschool physical activities is shown. Detailed Implementation

[0015] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0017] Figure 1 A flowchart of a method for monitoring the physiological load of preschool children's physical activities based on heart rate is shown.

[0018] like Figure 1 As shown, this invention discloses a method for monitoring the physiological load of physical activities in young children based on heart rate, comprising: S101, Obtain the individual physiological parameters of the child, including age and resting heart rate; S102, Based on the individual physiological parameters, determine the individual dynamic heart rate threshold of the child; S103, real-time collection of children's instantaneous heart rate during physical activities; S104, Based on the individualized dynamic heart rate threshold and the corresponding instantaneous heart rate of the child during physical activity, determine the instantaneous heart rate offset; S105, Iterate through the entire physical activity time of the corresponding child to determine the set of instantaneous heart rate offsets; S106, sum up the values ​​in the instantaneous heart rate offset set to obtain the physiological load index of the corresponding child during physical activity; S107 If the physiological load index of the corresponding child during physical activity is greater than the preset load index threshold, an early warning message will be triggered.

[0019] According to an embodiment of the present invention, the resting heart rate of the child can be measured by a wearable heart rate measuring device during the child's afternoon nap; the child must be in good health when the heart rate is measured, such as having a normal diet and normal body temperature; when the child participates in the heart rate measurement, dual consent (from the child and the guardian) must be obtained, and the privacy design principle must be adopted.

[0020] According to an embodiment of the present invention, the step of determining the individualized dynamic heart rate threshold of the infant based on the individual physiological parameters specifically includes: Determine the maximum heart rate of the child based on their age in the individual's physiological parameters; The heart rate difference is obtained by subtracting the corresponding resting heart rate from the child's maximum heart rate. Multiply the heart rate difference by the corresponding adjustment factor to obtain the current individualized dynamic heart rate adjustment value for the child. The child's current resting heart rate and individualized dynamic heart rate adjustment value are summed to obtain the child's individualized dynamic heart rate threshold.

[0021] It should be noted that the individualized dynamic heart rate threshold for young children is set as follows: The formula is: ,in This represents the resting heart rate, and k represents the adjustment coefficient, with a value ranging from 0.5 to 0.7. This represents the maximum heart rate for the corresponding young child. Its value is inversely proportional to the child's age, and the formula is: Where A represents the child's age.

[0022] Furthermore, the individual physiological parameters also include height and weight. The dynamic heart rate threshold is corrected based on the body mass index (BMI) to obtain the corrected individualized dynamic heart rate threshold. Its formula is ,in This represents the standard BMI for children of the same age. This represents the correction factor, and its value ranges from 0.1 to 0.3.

[0023] According to an embodiment of the present invention, the formula for obtaining the instantaneous heart rate offset is as follows: ,in This indicates the instantaneous heart rate deviation. Represents the instantaneous heart rate at time t. This indicates the child's individualized dynamic heart rate threshold.

[0024] It should be noted that when the individualized dynamic heart rate threshold of a child needs to be corrected, the individualized dynamic heart rate threshold in the corresponding formula is replaced by the corrected individualized dynamic heart rate threshold to improve the accuracy of the instantaneous heart rate deviation.

[0025] According to an embodiment of the present invention, it further includes: Obtain the types of physical activities for young children; Determine the exercise intensity factor for each type of early childhood physical activity; The instantaneous heart rate offset is revised based on the exercise intensity factor of the aforementioned children's physical activity. Let the revised instantaneous heart rate offset be... Its formula is: ;in This represents the exercise intensity factor corresponding to the physical activities of young children.

[0026] It should be noted that different types of preschool physical activities correspond to different exercise intensity factors. For example, preschool physical activities can be divided into low-intensity, medium-intensity, and high-intensity activities. The exercise intensity factor for low-intensity activities is 0.8, for medium-intensity activities it is 1.0, and for high-intensity activities it is 1.2.

[0027] According to an embodiment of the present invention, the load index threshold is dynamically set based on the child's age and resting heart rate, and the formula is as follows: ,in This represents the load index threshold, where 'a' represents the age adjustment factor. This indicates the maximum heart rate of the corresponding infant. The value represents the resting heart rate, and T represents the total duration of the corresponding physical activity; "*" represents a multiplication operation.

[0028] It should be noted that the setting of the load index threshold is related to the child's age and resting heart rate, and the age adjustment factor is related to age. For example, when the child is under 3 years old, the age adjustment factor is set to 0.4; when the child is between three and six years old, the age adjustment factor is set to 0.6.

[0029] According to an embodiment of the present invention, when triggering the warning notification information, it further includes: When a child's physiological load index exceeds the preset load index threshold for the first time during physical activity, the preset emotional protection window is activated. Based on a preset emotional protection window, the physical activities of the children are not interrupted; When the preset emotional protection window period ends, if the physiological load index of the child during physical activity is still greater than the preset load index threshold, forced interference information is generated, and a corresponding alternative activity plan is generated and sent to the preset management terminal for display.

[0030] It's important to note that when a child is suddenly interrupted while excited, they may become frustrated and even cry. Therefore, an emotional protection window is established. When the load index first exceeds the threshold, the system does not immediately issue a forced intervention message. Instead, it initiates a buffer period within the emotional protection window, while simultaneously sending a preliminary "observe carefully" prompt to the teacher. This provides the teacher with valuable time to make a decision and prepare for intervention. During this period, the teacher can observe the child's real-time state, such as their complexion, breathing, sweating, and emotions, and make a comprehensive judgment based on the system prompts. The child may be able to reduce the load within the window through self-regulation (such as naturally slowing down). This avoids unnecessary and harsh intervention for children who are only temporarily excited and have good self-regulation abilities, protecting their immersion in the game and their enjoyable experience. Only if the load continues to exceed the limit after the buffer period ends will the system escalate to a forced intervention message, ensuring that the safety baseline is not breached.

[0031] According to an embodiment of the present invention, the formula for obtaining the preset emotional protection window period is specifically as follows: ,in This indicates a pre-defined window of emotional protection. Indicates the base window duration. Indicates the attenuation coefficient. This indicates the physiological load index of young children during physical activities. This indicates the preset load index threshold.

[0032] It should be noted that the duration of the basic window should not be too short, for example, set to 1 to 3 minutes, and the decay coefficient should be 0.1 to 0.5 minutes per exponential unit; furthermore, the duration of the preset emotion protection window should not be less than 30 seconds, that is, when When the duration is less than 30 seconds, the preset emotion protection window value is 30 seconds.

[0033] According to an embodiment of the present invention, it further includes: If multiple children's preset emotional protection windows are received simultaneously within the preset emotional protection window period, the number of children corresponding to the preset emotional protection window period is extracted. Based on the stated numerical values, calculate the proportion of children whose pre-defined emotional protection window has been triggered; If the ratio exceeds a preset ratio threshold, an overall activity plan adjustment prompt message will be generated.

[0034] It's important to note that when multiple children simultaneously enter their emotional protection window, the system doesn't treat each warning in isolation, but rather performs cluster analysis. If it finds that these children are highly focused on the same group game, the system intelligently infers that the root cause likely lies in the overall rules or intensity design of the game. Therefore, the system prioritizes recommending "overall activity plan adjustment suggestions" to teachers. For example, it might suggest modifying the game rules (such as narrowing the chasing area or adding a "safe zone") or announcing a fun "rule switching point" for all participating children (such as "Magic time! All the little cheetahs are now slowly crawling turtles!"). This strategy achieves "seamless intervention," naturally reducing the burden on all participants by changing environmental rules. It effectively avoids the shame or frustration of individually stopping a child who is having a great time, protecting the atmosphere of the group activity and each child's self-esteem.

[0035] According to an embodiment of the present invention, it further includes: Obtain historical monitoring data for each child; Based on the historical monitoring data of the children, the number and rate of successes in which each child's physiological load index naturally fell from the threshold state to the normal range during the historical emotional protection window period were obtained. If the ratio is higher than the preset learning threshold, the base window duration is revised based on the preset fine-tuning factor.

[0036] It should be noted that if, within the historical emotional protection window, the success rate of a child naturally reducing their workload through self-regulation without external coercive intervention is higher than the preset learning threshold, it indicates that the child has a good self-regulation ability. Therefore, the basic window duration can be appropriately extended to optimize the preset emotional protection window duration.

[0037] Figure 2 A block diagram of a heart rate-based physiological load monitoring system for preschool physical activities is shown.

[0038] A second aspect of the present invention provides a heart rate-based physiological load monitoring system 2 for preschool children's physical activity, comprising a memory 21 and a processor 22. The memory stores a heart rate-based method program for monitoring the physiological load of preschool children's physical activity. When the processor executes the heart rate-based method program for monitoring the physiological load of preschool children's physical activity, it performs the following steps: Obtain individual physiological parameters of the child, including age and resting heart rate; Based on the individual physiological parameters, determine the child's individualized dynamic heart rate threshold; Real-time collection of children's instantaneous heart rate during physical activities; Based on the individualized dynamic heart rate threshold and the corresponding instantaneous heart rate of the child during physical activity, the instantaneous heart rate offset is determined; Iterate through the entire physical activity time of the corresponding child to determine the set of instantaneous heart rate offsets; The values ​​in the instantaneous heart rate offset set are summed to obtain the physiological load index of the corresponding child during physical activity; If the physiological load index of a child during physical activity exceeds the preset load index threshold, an early warning message will be triggered.

[0039] In this solution, the step of determining the individualized dynamic heart rate threshold for the infant based on the individual physiological parameters specifically includes: Determine the maximum heart rate of the child based on their age in the individual's physiological parameters; The heart rate difference is obtained by subtracting the corresponding resting heart rate from the child's maximum heart rate. Multiply the heart rate difference by the corresponding adjustment factor to obtain the current individualized dynamic heart rate adjustment value for the child. The child's current resting heart rate and individualized dynamic heart rate adjustment value are summed to obtain the child's individualized dynamic heart rate threshold.

[0040] In this solution, the formula for obtaining the instantaneous heart rate offset is as follows: ,in This indicates the instantaneous heart rate deviation. Represents the instantaneous heart rate at time t. This indicates the child's individualized dynamic heart rate threshold.

[0041] This invention discloses a method and system for monitoring the physiological load of preschool children's physical activities based on heart rate. The method includes: acquiring individual physiological parameters of the preschool children; determining an individualized dynamic heart rate threshold for the preschool children based on the individual physiological parameters; collecting the instantaneous heart rate of the preschool children during physical activities in real time; determining an instantaneous heart rate offset based on the individualized dynamic heart rate threshold and the instantaneous heart rate of the corresponding preschool children during physical activities; traversing the entire physical activity time of the corresponding preschool children to determine a set of instantaneous heart rate offsets; accumulating the values ​​in the instantaneous heart rate offset set to obtain the physiological load index of the corresponding preschool children during physical activities; and triggering an early warning message if the physiological load index of the corresponding preschool children during physical activities is greater than a preset load index threshold. This invention achieves accurate quantification and risk warning of preschool children's exercise load through the cumulative calculation of individualized dynamic heart rate thresholds and real-time heart rate offsets.

[0042] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0043] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units. They may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0044] In addition, in the various embodiments of the present invention, each functional unit can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0045] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0046] Alternatively, if the integrated units of this invention are implemented as software functional modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this invention, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, ROM, RAM, magnetic disks, or optical disks.

Claims

1. A method for monitoring the physiological load of physical activities in young children based on heart rate, characterized in that... ,include: Obtain individual physiological parameters of the child, including age and resting heart rate; Based on the individual physiological parameters, determine the child's individualized dynamic heart rate threshold; Real-time collection of children's instantaneous heart rate during physical activities; Based on the individualized dynamic heart rate threshold and the corresponding instantaneous heart rate of the child during physical activity, the instantaneous heart rate offset is determined; Iterate through the entire physical activity time of the corresponding child to determine the set of instantaneous heart rate offsets; The values ​​in the instantaneous heart rate offset set are summed to obtain the physiological load index of the corresponding child during physical activity; If the physiological load index of a child during physical activity exceeds the preset load index threshold, an early warning message will be triggered.

2. The method for monitoring the physiological load of preschool children's physical activities based on heart rate according to claim 1, characterized in that... The step of determining the individualized dynamic heart rate threshold for the infant based on the individual physiological parameters specifically includes: Determine the maximum heart rate of the child based on their age in the individual's physiological parameters; The heart rate difference is obtained by subtracting the corresponding resting heart rate from the child's maximum heart rate. Multiply the heart rate difference by the corresponding adjustment factor to obtain the current individualized dynamic heart rate adjustment value for the child. The child's current resting heart rate and individualized dynamic heart rate adjustment value are summed to obtain the child's individualized dynamic heart rate threshold.

3. The method for monitoring the physiological load of preschool children's physical activities based on heart rate according to claim 1, characterized in that... The formula for obtaining the instantaneous heart rate offset is as follows: ,in This indicates the instantaneous heart rate deviation. Represents the instantaneous heart rate at time t. This indicates the child's individualized dynamic heart rate threshold.

4. A method for monitoring the physiological load of preschool children's physical activities based on heart rate, as described in claim 3, is characterized in that... It also includes: Obtain the types of physical activities for young children; Determine the exercise intensity factor for each type of early childhood physical activity; The instantaneous heart rate offset is revised based on the exercise intensity factor of the aforementioned children's physical activity. Let the revised instantaneous heart rate offset be... Its formula is: ;in This represents the exercise intensity factor corresponding to the physical activities of young children.

5. A method for monitoring the physiological load of preschool children's physical activities based on heart rate, as described in claim 1, characterized in that... The load index threshold is dynamically set based on the child's age and resting heart rate, and the formula is as follows: ,in This represents the load index threshold, where 'a' represents the age adjustment factor. This indicates the maximum heart rate of the corresponding infant. "T" represents the resting heart rate, and "T" represents the total duration of the corresponding physical activity; "*" represents a multiplication operation.

6. A method for monitoring the physiological load of preschool children's physical activities based on heart rate, as described in claim 1, is characterized in that... When triggering the warning message, it also includes: When a child's physiological load index exceeds the preset load index threshold for the first time during physical activity, the preset emotional protection window is activated. Based on a preset emotional protection window, the physical activities of the children are not interrupted; When the preset emotional protection window period ends, if the physiological load index of the child during physical activity is still greater than the preset load index threshold, forced interference information is generated, and a corresponding alternative activity plan is generated and sent to the preset management terminal for display.

7. A method for monitoring the physiological load of preschool children's physical activities based on heart rate, as described in claim 6, characterized in that... The formula for obtaining the preset emotional protection window period is as follows: ,in This indicates a pre-defined window of emotional protection. Indicates the base window duration. Indicates the attenuation coefficient. This indicates the physiological load index of young children during physical activities. This indicates the preset load index threshold.

8. A heart rate-based physiological load monitoring system for preschool physical activities, characterized in that, The system includes a memory and a processor. The memory stores a program for monitoring the physiological load of physical activity in young children based on heart rate. When the processor executes the program, the following steps are performed: Obtain individual physiological parameters of the child, including age and resting heart rate; Based on the individual physiological parameters, determine the child's individualized dynamic heart rate threshold; Real-time collection of children's instantaneous heart rate during physical activities; Based on the individualized dynamic heart rate threshold and the corresponding instantaneous heart rate of the child during physical activity, the instantaneous heart rate offset is determined; Iterate through the entire physical activity time of the corresponding child to determine the set of instantaneous heart rate offsets; The values ​​in the instantaneous heart rate offset set are summed to obtain the physiological load index of the corresponding child during physical activity; If the physiological load index of a child during physical activity exceeds the preset load index threshold, an early warning message will be triggered.

9. A heart rate-based physiological load monitoring system for preschool physical activities according to claim 8, characterized in that... The step of determining the individualized dynamic heart rate threshold for the infant based on the individual physiological parameters specifically includes: Determine the maximum heart rate of the child based on their age in the individual's physiological parameters; The heart rate difference is obtained by subtracting the corresponding resting heart rate from the child's maximum heart rate. Multiply the heart rate difference by the corresponding adjustment factor to obtain the current individualized dynamic heart rate adjustment value for the child. The child's current resting heart rate and individualized dynamic heart rate adjustment value are summed to obtain the child's individualized dynamic heart rate threshold.

10. A heart rate-based physiological load monitoring system for preschool physical activities according to claim 8, characterized in that... The formula for obtaining the instantaneous heart rate offset is as follows: ,in This indicates the instantaneous heart rate deviation. Represents the instantaneous heart rate at time t. This indicates the child's individualized dynamic heart rate threshold.

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