Motion Force Analysis of Group B Difficulty Movements in College Students’ Aerobics Based on Surface Electromyography Characteristics

This paper aims to understand the motion force characteristics of college students when performing group B difficulty movements in aerobics through surface electromyography and 3D camera technology. Subjects were five male aerobics national first-grade. The surface electromyography characteristics were collected by Noraxon electromyography system and kinematic characteristics were collected by a motion capture system. Subjects were required to perform the B588 movement (1/2 turn pike jump 1/2 twist to push up) three times, and the best one was analysed. The average value was taken to analyse the athletes’ motion force characteristics. Results showed that in the take-off phase, the lower limb muscles primarily underwent electrical discharge. The left rectus femoris muscle exhibited the highest discharge during the cushioning and extension phases, measuring 256.17 μV and 185.77 μV, respectively, with full extension of the hip and knee joints. During the flight phase, both lower limb and abdominal muscles exerted noticeable force while maintaining extended knee and ankle joints, although there was a slight difference in angle between left and right ankles. In the landing phase, all muscles exerted significant force and the elbow joints were primarily responsible for joint cushioning. Completing the B588 movement requires athletes to have higher levels of lower limb explosive force, body balance force, and joint control force. During the training process, athletes should focus on strengthening muscle strength and improving ankle joint stability.