Department of Orthotics and Prosthetics, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
Rehabilitation Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
Proc Inst Mech Eng H. 2022 Jul;236(7):988-993. doi: 10.1177/09544119221098529. Epub 2022 May 15.
Aging is associated with decreases in gait performance and mobility. Toe-only rocker sole is prescribed as a common shoe modification in restricted foot and ankle joints mobility. Therefore, this study aimed to determine the effect of toe-only rocker sole shoes on the ground reaction force (GRF) in the elderly. Twenty-one older adults walked on a walkway equipped with one force plate under six different conditions including barefoot (BF), normal shoe (NS), and four types of toe-only rocker sole shoes (RS) with various degrees of rocker angle (RS10, RS20, RS30, and RS40). The peaks of the GRFs in three planes were obtained. Different rocker angles could affect GRF parameters. The first peak of GRF (FZ) significantly increased with both RS30 and RS40 compared to BF, NS, RS10, and RS20. FZ significantly decreased with RS30 compared to RS40. The braking force (FX) was significantly lower with NS compared to RS30 and RS40. FX was significantly higher with RS40 compared to the other shoe conditions. The propulsive force (FX) significantly decreased during walking with BF compared to NS, RS20, RS30, and RS40. A higher FX was observed in RS40 than the other shoe conditions except RS30. Also, FX was significantly lower with RS10 compared to RS30. Increasing rocker angle may result in an increase in the peak magnitude of FZ, FX, FX in the elderly without any improvement in walking speed.
衰老是与步态表现和移动能力下降有关。在足部和踝关节活动受限的情况下，通常会建议使用仅前脚掌有弧形的鞋底来对鞋子进行改造。因此，本研究旨在确定仅前脚掌有弧形的鞋底鞋对老年人地面反作用力（GRF）的影响。21 位老年人在装有一个力板的步行道上分别在六种不同条件下行走，包括赤脚（BF）、正常鞋（NS）和四种不同弧形角度的仅前脚掌有弧形的鞋底鞋（RS）（RS10、RS20、RS30 和 RS40）。获得了三个平面的 GRF 峰值。不同的弧形角度会影响 GRF 参数。与 BF、NS、RS10 和 RS20 相比，RS30 和 RS40 的 GRF 的第一峰值（FZ）显著增加。与 RS40 相比，RS30 的 FZ 显著降低。与 RS30 和 RS40 相比，NS 的制动力（FX）显著降低。与其他鞋类条件相比，RS40 的 FX 显著升高。与 NS、RS20、RS30 和 RS40 相比，BF 行走时的推进力（FX）显著降低。RS40 的 FX 高于其他鞋类条件，除了 RS30。此外，与 RS30 相比，RS10 的 FX 显著降低。增加弧形角度可能会导致 FZ、FX、FX 的峰值幅度在老年人中增加，而不会改善步行速度。
