Relationships among Knee Flexion in Stance, Knee Extension Torque and Gait Parameters during Normal Walking for Elderly Women

Abstract

Relationships among knee flexion in stance, knee extension torque and gait parameters were examined for normal walking. Participants were healthy female subjects aged 41 to 82 years. Maximal knee flexion angle in stance (Kflx) and gait parameters such as stance, swing and walking speed were recorded with video and analyzed for normal walking. Knee extension isokinetic torque at Kflx and peak torque were measured using a Cybex 340 at 60°/s. Although peak torque was significantly different, knee extension torque at Kflx did not differ with age. Peak torque was significantly correlated with only the swing ratio, however knee extension torque at Kflx was significantly correlated with the swing ratio, swing/stance ratio, and the double stance phase and its ratio in the gait parameters. As a result, the usefulness of maximal knee extension torque at the near flexion angle used during walking, and swing and double stance were suggested for assessment of gait on the basis of muscle strength.