Design and Research on the Seated Trainer of Bidirectional Resistance for Torsion of Waist
This work aims to study a seated trainer of bidirectional resistance for twist,in order to improve the strength of lumbar muscles and provide an innovative and safe training methods for prevention and rehabilitation of lumbar injuries.According to the theory of fluid mechanics,a swinging hydraulic cylinder is designed to control the damping by adjusting the size of the spout.The seated trainer of bidirectional resistance is designed according to the body size of Chinese adults.The seated trainer of bidirectional resistance and the traditional gravity twist trainer are tested by surface electromyography(sEMG)technology,and the resistance characteristics of the two are compared to verify the functionality of the designed samples.The former trainer could provide bidirectional resistance,but the traditional gravity twist trainer could only provide unidirectional resistance.The peak time of sEMG waveform reflecting damping softness(42.25±7.13％)is obviously slower than the latter(39.89±6.50％),p＜0.05.Withthe seated trainer of bidirectional resistance,the agonist and antagonist muscles can be exercised at the same time,giving consideration to the balance and efficiency of training,and the softer movement resistance can improve exercise safety.
bidirectional resistance trainingindustrial designtorsion of waistsurface electromyography
NETL
NSTL
万方数据
