Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Suite 1406, 345 E, Superior Street, Chicago, IL 60611, USA.
Gait Posture. 2011 Jul;34(3):402-8. doi: 10.1016/j.gaitpost.2011.06.010. Epub 2011 Jul 12.
Load carriage walking (LCW) challenges a person's balance as the load increases their forward trunk inclination, shifting the center of mass (COM) forward with respect to the base of support (BOS). We examined LCW to understand whether and how healthy people adjust the temporal relationship (TR) between the trunk and leg for balance control. Ten subjects were recruited to perform unloaded walking and LCW. The TR between the trunk and leg was measured by the continuous relative phase. The maximum forward displacement of the COM with respective to the BOS (FDCOM(BOS)) was recorded during the stance phase. We found that the TR was shifted in LCW, and the shift was associated with a decrease in the maximum FDCOM(BOS). The findings suggest that the TR between the trunk and leg contributes to balance control, and it may be a variable that needs to be addressed in gait rehabilitation.
负重行走（LCW）会挑战人的平衡能力，因为负重会增加上身前倾的角度，使重心（COM）相对于支撑基础（BOS）向前移动。我们研究了 LCW，以了解健康人是否以及如何调整躯干和腿部之间的时间关系（TR）以进行平衡控制。招募了 10 名受试者进行无负载行走和 LCW。躯干和腿部之间的 TR 通过连续相对相位进行测量。在站立阶段记录了 COM 相对于 BOS 的最大向前位移（FDCOM（BOS））。我们发现，LCW 中的 TR 发生了转移，这种转移与最大 FDCOM（BOS）的减少有关。研究结果表明，躯干和腿部之间的 TR 有助于平衡控制，它可能是步态康复中需要解决的一个变量。
