Abstract
Sports fatigue will cause deformation of actions. In this study, badminton was analyzed, and the influence which was brought by fatigue was studied from the perspective of biomechanics. The forehand smash of professional badminton athletes under normal and fatigue states was tested. The biomechanical indexes of athletes were obtained by infrared remote shooting test system and plantar pressure test system for comparison. The results showed that the forehand smash effect of athletes was significantly worse under fatigue state, the maximum gravity center height decreased to 1.22 ± 0.14 m, and the maximum gravity center speed decreased to 2.33 ± 0.12 m/s, which showed significant decreases compared to the normal state (P< 0.05). Moreover the maximum velocity of the right upper arm, right forearm, elbow joint, wrist joint and knee joint decreased significantly (P< 0.5), the maximum angle of the right hip joint, knee joint and left ankle joint also decreased significantly. The pressure of the inner side of the forefoot and the pressure in the middle of the forefoot increased (P< 0.05). The biomechanical analysis of forehand smash under fatigue condition reveals the relationship between fatigue and movement, which provides some scientific bases for the reasonable control of sports load.
Highlights
A large number of high-intensity sports are indispensable to all kinds of competitive sports, and fatigue is inevitable
By comparing the biomechanical indicators of the athletes in normal and fatigue states, it was found that the performance of the athletes declined significantly in the state of fatigue
Forehand smash is a process in which the upper arm drives the forearm
Summary
A large number of high-intensity sports are indispensable to all kinds of competitive sports, and fatigue is inevitable. Jayalath et al [6] analyzed jumping by two feet and jumping by one foot under fatigue They found that fatigue affected the biomechanics of ankle joint, in details, the strength of ankle joint and ground reaction force were reduced, and the knee joint flexion was increased. Forehand smash is one of the most important and most used scoring methods in badminton [7, 8] It has characteristics of high speed, great strength and many routes. It is of great significance and value to study the biomechanical effects of forehand smash on badminton under fatigue condition. The biomechanical index data of athletes under different conditions were obtained and compared through experiments, in order to understand the influence of fatigue on the completion of athletes' movements and provide some reference for reasonable adjustment of fatigue state
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