Correlation of bilateral and ipsilateral strength ratios with balance in female taekwondo athletes

摘要

This study aimed to analyze preferred leg (PLs) and non-preferred leg (NPLs) isokinetic knee strength, lateralasymmetry ratios and to examine their correlation with static balance. Sixteen female taekwondo (TKD) athletesvoluntarily participated in the study. Knee isokinetic extension (Ex) and flexion (Flx) strength were measured inconcentric / concentric (Con / Con) contractions at angular velocities of 60°/s, 180°/s, and 240°/s. Ipsilateral hamstring/ quadriceps (H/Q) and bilateral (H/H and Q /Q) ratios were calculated. Static balances were determined by taking thecenter of body pressure in X (COPX) and Y (COPY) axis. Paired sample t-test and Pearson correlation tests were used instatistical analysis. When the isokinetic knee strength was examined, it was found that 60°/s angular velocity parameterwas significantly different in Flx phase while 180°/s and 240°/s angular velocities were found to be significantlydifferent in Ex phase in favor of PLs. There was no significance in bilateral and ipsilateral strength ratios of all angularvelocities. There was a significant correlation between 240°/s HQ and COPX in terms of ipsilateral asymmetry ratioswhereas a significant correlation was found between 60°/s HH and COPX in terms of bilateral asymmetry ratios. It wasfound that there were differences in strength between PL and NPLs, but no asymmetry was observed. There was no highlevel of correlation between lateral asymmetry ratios and balance in female TKD practitioners.