Koyama Keiji, Yamauchi Junichiro
Toin University of Yokohama, Kanagawa, JAPAN.
Tokyo Metropolitan University, Tokyo, JAPAN.
Eur J Sport Sci. 2023 Apr;23(4):520-529. doi: 10.1080/17461391.2022.2050950. Epub 2022 Apr 4.
This study investigated whether an increase in toe flexor strength influenced postural control during static upright standing after 12 weeks of multicomponent exercise training in healthy young men. Twelve men (18-23 yrs) performed multicomponent exercise 3 days per week for 12 weeks. Twelve additional age-matched men were recruited for the untrained control group. The multicomponent exercise training consisted of strengthening and balance exercises for the foot and leg muscles. Toe flexor strength, foot arch height and postural control were assessed before, during, and after exercise training. Postural control was evaluated using the path of the centre of pressure, which was obtained with a force plate under three standing conditions: double-leg standing with eyes open, double-leg standing with eyes closed, and single-leg standing with eyes open. The dominant leg was used for single-leg standing. After exercise training, toe flexor strength increased by approximately 32% ( < 0.01), whereas the foot arch height did not change. The centre of pressure variables during double-leg standing did not change after exercise training; however, these variables decreased during single-leg standing. None of the variables in the control group changed after exercise training. The relative increase in toe flexor strength was not correlated with the relative improvement in the centre of pressure variables during single-leg standing after 12 weeks of exercise training (total length, r = 0.1734; mean velocity, r = 0.1734; sway area, r = -0.1372). These findings suggest that increased toe flexor strength has no significant effect on static postural control ability after exercise training in young men.Twelve weeks of multicomponent exercise training aimed at strengthening foot and leg muscles increased toe flexor strength.Multicomponent exercise training did not alter postural stability during double-leg standing, but improved postural stability during single-leg standing.Increased toe flexor strength did not relate to altered postural stability during static upright standings after 12 weeks of exercise training.
本研究调查了在健康年轻男性进行为期12周的多组分运动训练后，趾屈肌力量的增加是否会影响静态直立站立时的姿势控制。12名男性（18 - 23岁）每周进行3天的多组分运动，持续12周。另外招募了12名年龄匹配的男性作为未训练的对照组。多组分运动训练包括针对足部和腿部肌肉的强化和平衡练习。在运动训练前、训练期间和训练后评估趾屈肌力量、足弓高度和姿势控制。姿势控制通过压力中心的轨迹进行评估，该轨迹是在三种站立条件下使用测力台获得的：睁眼双腿站立、闭眼双腿站立和睁眼单腿站立。单腿站立使用优势腿。运动训练后，趾屈肌力量增加了约32%（<0.01），而足弓高度没有变化。运动训练后，双腿站立时的压力中心变量没有变化；然而，这些变量在单腿站立时有所下降。对照组的变量在运动训练后没有变化。运动训练12周后，趾屈肌力量的相对增加与单腿站立时压力中心变量的相对改善无关（总长度，r = 0.1734；平均速度，r = 0.1734；摆动面积，r = -0.1372）。这些发现表明，在年轻男性中，运动训练后趾屈肌力量的增加对静态姿势控制能力没有显著影响。为期12周的旨在强化足部和腿部肌肉的多组分运动训练增加了趾屈肌力量。多组分运动训练没有改变双腿站立时的姿势稳定性，但改善了单腿站立时的姿势稳定性。运动训练12周后，趾屈肌力量的增加与静态直立站立时姿势稳定性的改变无关。
