Low strength is related to diminished ground reaction forces and walking performance in older women.

摘要: The purpose of this study was to determine how lower-limb strength in older women affected gait speed, supportive forces, spatial, and temporal aspects walking gait. Twenty-four between 65 80 yr performed maximal voluntary isometric contractions for the knee extensors (KE), flexors (KF), ankle plantarflexors (PF) dorsiflexors (DF) were separated into low normal groups using a KE torque threshold 1.5 Nm kg(-1). They walked at both standard speed 0.8 m s(-1) self-selected on an instrumented treadmill that recorded vertical ground reaction forces (vGRF) spatiotemporal measures. Older with had 30% lower torque, 36% PF 34% rate development (RTD) KF RTD. Low demonstrated slower speeds (1.26±0.20 vs. 1.56±0.20 s(-1)), vGRF during weight acceptance (1.15±0.10 BW 1.27±0.13 BW), rates (11.3±0.5 17.0±5.5 stride rates, shorter lengths, longer foot-ground double-limb support times (all P<0.05). Maximal strongly correlated peak (r=0.60-0.85, P<0.01) moderately related (r=0.42-0.60, In strength, diminished vGRFs associated putting them risk mobility limitation, disability, poor health, loss independence.