Sands W A, Hondzinski J M, Shultz B B, George G S
Department of Exercise and Sport Science, University of Utah, Salt Lake City 84112, USA.
J Orthop Sports Phys Ther. 1995 Aug;22(2):65-72. doi: 10.2519/jospt.1995.22.2.65.
The jogging minitrampoline is a common tool for exercise and rehabilitation that is lauded as helpful in reducing lower extremity stresses. The deformable bed of the minitrampoline may result in altered jogging mechanics of the subtalar joint, potentially leading to uncharacteristic mechanics of the lower extremity. The purpose of this study was to examine eversion of the subtalar joint in subjects jogging on the minitrampoline vs. a wooden floor surface. Subjects were instrumented with a flexible electrogoniometer (elgon) taped from the heel to the gastrocnemius along the Achilles tendon. The elgon was interfaced to a personal computer. Data were examined for the average maximal eversion values of five steps during jogging in two experiments. Results of the first experiment (N = 27) indicated significantly greater mean maximal eversion angles while jogging on the minitrampoline than on the floor. The second experiment involved 10 male and 10 female subjects jogging for 20 minutes with a counterbalanced sequence of jogging conditions, alternating between the floor and the minitrampoline. The second experiment indicated that maximal eversion angles were significantly greater on the minitrampoline than on the floor and increasing jogging time resulted in greater eversion angles and a significant interaction between jogging condition and time. Results suggest that people who should avoid valgus deviations to the lower leg should not jog on the jogging minitrampoline.
慢跑用小型蹦床是一种常见的运动和康复工具，被誉为有助于减轻下肢压力。小型蹦床的可变形床面可能会导致距下关节的慢跑力学发生改变，从而可能导致下肢出现异常力学情况。本研究的目的是比较在小型蹦床上慢跑与在木地板表面慢跑的受试者距下关节的外翻情况。受试者在跟腱处从脚跟到腓肠肌贴上一个柔性电子测角仪（elgon）。该电子测角仪与个人电脑相连。在两个实验中，对慢跑过程中五步的平均最大外翻值进行了数据检测。第一个实验（N = 27）的结果表明，在小型蹦床上慢跑时的平均最大外翻角度明显大于在地面上慢跑时的角度。第二个实验让10名男性和10名女性受试者以平衡的慢跑条件顺序慢跑20分钟，在地面和小型蹦床之间交替。第二个实验表明，在小型蹦床上的最大外翻角度明显大于在地面上的角度，并且增加慢跑时间会导致更大的外翻角度，以及慢跑条件和时间之间存在显著的交互作用。结果表明，应避免小腿出现外翻偏差的人不应在慢跑用小型蹦床上慢跑。
