Abstract
[Purpose] It is considered that in knee extension, the hamstring acts in a closed kinetic chain. The objective of this study was to examine the correlation between knee flexion strength measured by a hand-held dynamometer (HDD) and leg extension torque measured by StrengthErgo. [Subjects] The subjects were 22 healthy adults with no impairments of the leg. [Method] We measured as body weight ratios, peak torque during left and right leg extension, and left and right knee flexion strength. Then, we examined the correlations between left and right leg extension torque and knee flexion strength using Spearman's correlation coefficient. [Results] A medium level of correlation was found between left and right leg extension torque and knee flexion strength. [Conclusion] The results suggest the necessity of performing muscle training of the hamstrings for the objectives of raising walking speed or transfer from the supine or sitting positions to standing.
