A Study on the Relationship between Asymmetry in Lower Limb Muscle Strength and Dynamic Balance in Speed Skaters
OBJECTIVE:This study aims to investigate the correlation between lower limb muscle strength and dynamic balance in speed skaters by analyzing metrics of muscle strength and dynamic balance.METHODS:Sixteen speed skaters were selected as subjects,and a constant velocity muscle strength testing system(CON-TREX)along with the Lower Limb Y Balance Test(YBT)were employed to assess muscle strength levels at the hip,knee,and ankle joints,as well as the anterior,posterior-lateral,posterior-medial,and composite values for both left and right lower limbs.RESULTS:Asymmetry in the hip,knee,and ankle joints was all below 15%,and no significant difference in dynamic balance was observed between the left and right lower limbs(p＞0.05).Remarkable negative correlations were found between asymmetry in eccentric contraction of the hip joint(r =-0.52,p =0.048＜0.05),eccentric contraction of the ankle joint(r=-0.63,p =0.012＜0.05),and concentric contraction of the ankle joint(r=-0.68,p =0.005＜0.01)with the composite value on the left side.Similarly,significant negative correlations were noted between asymmetry in concentric contraction of the knee joint(r =-0.56,p =0.029＜0.05)and eccentric contraction of the ankle joint(r =-0.61,p =0.015＜0.05)with the composite value on the right side.CONCLUSION:Asymmetry exists in the lower limbs of speed skaters,while dynamic balance remains relatively stable between the left and right sides.In comparison to extensors,lower limb flexor asymmetry exhibits a higher degree of negative correlation with dynamic balance.Furthermore,compared to the hip and knee joints,the ankle joint displays a higher degree of negative correlation with dynamic balance.
万方数据
维普
