a Institute of Sports and Health Science , Hiroshima , Japan.
Res Sports Med. 2013;21(4):395-401. doi: 10.1080/15438627.2013.825802.
The purpose of this study is to examine the differences in plantar force associated with changes in backpack load and gait speed during walking. The F-scan tethered system was used to collect plantar pressure data. Subjects were asked to walk on a treadmill with varied levels of backpack load (0%, 10%, 20%, and 30% of body mass) and gait speed (4, 5, and 6 km/h). We found that an increase in gait speed and backpack load lead to increase in the magnitude of the first vertical ground reaction force (vGRF) peak. Greater magnitudes of the second vGRF peak were only associated with an increase when gait speeds were 4 km/h and 5 km/h. There was no speed-related change in the magnitudes of the second vGRF peak at the speed of 6 km/h. The results of this study may be important for the purpose of constituting a load-bearing walking program for protecting against osteoporosis.
本研究旨在探讨在行走过程中，背包负荷和步速变化对足底力的影响。使用 F 扫描系绳系统收集足底压力数据。要求受试者在跑步机上以不同的背包负荷（体重的 0%、10%、20%和 30%）和步速（4、5 和 6km/h）行走。我们发现，步速和背包负荷的增加会导致第一垂直地面反力（vGRF）峰值的幅度增加。仅当步速为 4km/h 和 5km/h 时，第二 vGRF 峰值的幅度才会随着增加而增加。当步速为 6km/h 时，第二 vGRF 峰值的幅度没有与速度相关的变化。本研究的结果对于制定负重行走方案以预防骨质疏松症可能具有重要意义。
