Yamada Naomi, Okamoto Shogo, Shiraishi Yuma, Hashimoto Senri, Akiyama Yasuhiro, Yamada Yoji
Department of Rehabilitation, Aichi Medical College: 519 Ichiba, Kiyosu-city, Aichi 452-0931, Japan.
Department of Mechanical Systems Engineering, Nagoya University, Japan.
J Phys Ther Sci. 2021 Mar;33(3):179-186. doi: 10.1589/jpts.33.179. Epub 2021 Mar 17.
[Purpose] Self-stretching is the traditional at-home stretching method of choice. We developed an automatic foot-stretching machine to perform effective dorsiflexion stretching safely and easily at home. The effects of automatic stretching using our machine and self-stretching were investigated and compared. [Participants and Methods] Twelve healthy elderly people participated in the study. Automatic dorsiflexion static stretching was performed with the right foot, and self-stretching using a towel was performed with the left foot. Before and after each stretching, passive range of motion in dorsiflexion, maximal voluntary contraction strength in plantarflexion, passive resistive torque during passive dorsiflexion, and displacement of the muscle-tendon junction of the medial gastrocnemius muscle were measured. [Results] The range of motion in dorsiflexion had a significantly greater increase after automatic stretching than after self-stretching. The maximum strength in plantarflexion tended to decrease after automatic stretching but did not decrease after self-stretching. The passive resistive torque in both types of stretches decreased in some of the participants but increased in others. The displacement of the muscle-tendon junction of the medial gastrocnemius tended to shorten during automatic stretching as compared with self-stretching. [Conclusion] Foot stretching using a machine is as effective as self-stretching and tends to affect the tendon rather than the muscle.
[目的] 自我拉伸是传统的家庭拉伸方法。我们研发了一种自动足部拉伸机，以便在家中安全、轻松地进行有效的背屈拉伸。研究并比较了使用我们的机器进行自动拉伸和自我拉伸的效果。[参与者与方法] 12名健康老年人参与了这项研究。用右脚进行自动背屈静态拉伸，用左脚使用毛巾进行自我拉伸。每次拉伸前后，测量背屈的被动活动范围、跖屈的最大自主收缩力量、被动背屈时的被动阻力矩以及腓肠肌内侧肌腱结合处的位移。[结果] 自动拉伸后背屈活动范围的增加明显大于自我拉伸后。自动拉伸后跖屈的最大力量趋于下降，但自我拉伸后并未下降。两种拉伸方式中的被动阻力矩在一些参与者中下降，但在另一些参与者中增加。与自我拉伸相比，自动拉伸过程中腓肠肌内侧肌腱结合处的位移趋于缩短。[结论] 使用机器进行足部拉伸与自我拉伸效果相同，且倾向于影响肌腱而非肌肉。
