Cinematic analyses of human walking are widely carried out, but the assessment of
sex-related differences is still incomplete. Knee range of motion was investigated in healthy sedentary subjects during
standardized speed treadmill walking.
Subjects and Methods:
One hundred and three subjects aged 20-79 years were filmed by an optoelectronic system. Threedimensional
knee joint angular data were obtained from trajectories of markers using Euler operators.
On average, within sex, flexion-extension and internal-external rotation were symmetric (Watson-Williams' test,
p > 0.05). During walking, women had a larger knee flexion-extension (mean 67.5°, SD 0.8°) than men (mean 64.8°, SD
0.8°, p < 0.05), but similar internal-external rotation (women, 22.6°, SD 0.6°; men, 21.2°, SD 0.5°). No significant correlations
between movements and age or anthropometric characteristics were found.
In healthy sedentary adults, treadmill walking is performed with knee range of motion that is largely independent
from age, sex or anthropometry.