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To realize real-time monitoring and evaluation of muscle strength, this study designed and validated a wearable muscle strength monitoring system based on muscle perimeter changes.
Six healthy college students who are not sports majors wore the monitoring gear based on the change of muscle perimeter to perform the isokinetic muscle strength test, the real-time data of the change of muscle perimeter during the isokinetic exercise was obtained. After analyzing and processing the curve of muscle perimeter change over time, namely, the peak muscle perimeter change (PP), the peak velocity of muscle perimeter change (PVP) and the accumulation of muscle perimeter change (AP) over time in a single exercise, Pearson correlation analysis was conducted with the peak torque (PT), the peak torque to body weight ratio (PT/BW), the torque at 0.18 s (T0.18) and the endurance ratio (ER) obtained by the isokinetic muscle strength test. The reliability of wearable system for real-time muscle strength monitoring was verified. The muscle perimeter changes were sampled with the arm and leg wearable protectors, and the muscle perimeter monitoring positions corresponded to the largest muscle perimeter changes when the strength of biceps in the upper arm was applied, as well as the largest muscle perimeter changes when the strength of quadriceps above the knee was applied. The isokinetic muscle strength test was performed on elbow and knee joints using the Biodex System 4 pro device.
Dynamic muscle perimeter changes could be used to monitor the muscle strength level of the human body. There was a significant correlation between arm muscle perimeter and elbow muscle strength index (P≤0.01), and the maximum correlation coefficient was 0.91. Leg muscle perimeter was significantly correlated with knee muscle strength (P≤0.01), and the maximum correlation coefficient was 0.99.
The wearable muscle strength monitoring system has a high reliability and can be used for real-time monitoring of the elbow and knee muscle strength during isokinetic exercise.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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