Balance and lower limb strength deficits are associated with a high incidence of falls in older adults. This study investigated the association between balance control during and after stair descent onto a compliant surface and lower limb strength. Thirty-five women and 14 men participated in this study. Stair descent time, mean center of pressure velocity in anteroposterior and mediolateral direction during stair descent (CoP V_AP and CoP V_ML), and CoP velocity in the first 5 s of restabilization phase (CoP V₅) were evaluated. Bilateral strength of the knee flexors and extensors, and ankle plantar and dorsal flexors was evaluated. Spearman correlation analysis with Bonferroni correction yielded a significant association between the strength of the knee flexors on the trailing limb and stair descent time in women (r = 0.502, p = 0.002, R² = 0.246). The same analysis in men revealed a significant association between the strength of the knee flexors on the trailing limb and CoP V_AP (r = −0.820, p < 0.001, R² = 0.280) and CoP V_ML (r = −0.697, p = 0.006, R² = 0.359). The strength of the ankle plantar flexors on the trailing limb was significantly associated with stair descent time (r = 0.684, p = 0.007, R² = 0.429) and CoP V_AP (r = −0.723, p = 0.003, R² = 0.408) in men. Stair descent balance control is associated with knee flexion strength on trailing limb in women, and with ankle plantar flexion and knee flexion strength on the same limb in men.

平衡和下肢力量不足与老年人跌倒的高发有关。这项研究调查了楼梯下降到顺应性表面期间和之后的平衡控制与下肢力量之间的关系。35名女性和14名男性参加了这项研究。楼梯下降时间，楼梯下降过程中前后方向的平均压力速度中心（CoP V _AP和CoP V _ML）以及再稳定阶段前5 s的CoP速度（CoP V ₅）进行了评估。评估膝关节屈伸肌，踝足底屈肌和背屈肌的双侧力量。用Bonferroni校正进行的Spearman相关分析在女性后肢的膝盖屈肌力量与楼梯下降时间之间建立了显着关联（r = 0.502，p = 0.002，R ²  = 0.246）。男性的相同分析表明，后肢膝屈肌的力量与CoP V _AP（r = -0.820，p <0.001，R ²  = 0.280）和CoP V _ML（r = -0.697，p = 0.006，R ²  = 0.359）。后肢的踝plant屈肌力量与下楼梯时间显着相关（r = 0.684，p = 0.007，R²  = 0.429）和CoP V _AP（r = -0.723，p = 0.003，R ²  = 0.408）。楼梯下降的平衡控制与女性尾随肢体的膝盖屈伸强度以及男性相同肢体的踝plant屈和膝盖屈伸强度有关。