Lee Jinkyu, Yoon Yong-Jin, Shin Choongsoo S
1 Sogang University.
2 Nanyang Technological University.
J Appl Biomech. 2017 Dec 1;33(6):397-405. doi: 10.1123/jab.2016-0221. Epub 2017 Nov 8.
The purpose of this study was to investigate the effect of load carriage on the kinematics and kinetics of the ankle and knee joints during uphill walking, including joint work, range of motion (ROM), and stance time. Fourteen males walked at a self-selected speed on an uphill (15°) slope wearing military boots and carrying a rifle in hand without a backpack (control condition) and with a backpack. The results showed that the stance time significantly decreased with backpack carriage (p < .05). The mediolateral impulse significantly increased with backpack carriage (p < .05). In the ankle joints, the inversion-eversion, and dorsi-plantar flexion ROM in the ankle joints increased with backpack carriage (p < .05). The greater dorsi-plantar flexion ROM with backpack carriage suggested 1 strategy for obtaining high plantar flexor power during uphill walking. The result of the increased mediolateral impulse and inversion-eversion ROM in the ankle joints indicated an increase in body instability caused by an elevated center of mass with backpack carriage during uphill walking. The decreased stance time indicated that an increase in walking speed could be a compensatory mechanism for reducing the instability of the body during uphill walking while carrying a heavy backpack.
本研究的目的是调查在上坡行走过程中负重对踝关节和膝关节的运动学和动力学的影响，包括关节功、活动范围（ROM）和站立时间。14名男性穿着军靴，手持步枪，在没有背包（对照条件）和背着背包的情况下，以自行选择的速度在上坡（15°）斜坡上行走。结果显示，背着背包时站立时间显著减少（p < .05）。背着背包时，内外侧冲量显著增加（p < .05）。在踝关节方面，背着背包时踝关节的内翻-外翻和背屈-跖屈ROM增加（p < .05）。背着背包时更大的背屈ROM表明这是在上坡行走过程中获得高跖屈力量的一种策略。踝关节内外侧冲量和内翻-外翻ROM增加的结果表明，在上坡行走过程中背着背包时，由于质心升高导致身体不稳定性增加。站立时间减少表明，提高步行速度可能是一种补偿机制，用于在背着沉重背包上坡行走时减少身体的不稳定性。
