Isokinetic Strength of Quadriceps and Hamstring, Hamstrings/Quadriceps Ratios in Elite Sports Athletes / 체질인류학회지

The purpose of this study was to investigate of isokinetic strength of quadriceps and hamstring, hamstrings/quadriceps ration in elite sports athletes to provide the data for injury prevention, fitness level evaluation and training methodology. The subjects selected for this study were 104 elite sports athletes. They didn't have any medical problem. Isokinetic peak torque, flexor/extensor ratio at 60 deg/sec of the knee extension and flexion were measured using an cybex 770. The data were analyzed utilizing One way ANOVA. The level of statistical significance was set at p<.05. On the basis of the results analyzed in this study, conclusion were drawn as follow: 1. Dominant knee extension peak torque (Nm) were no significant differences in man but man elite athletes were higher than woman elite players in 60 deg/sec (p<.05). 2. Dominant knee extension peak torque (% body weight) of man elite athletes were higher than woman elite players in 60 deg/sec except only man volleyball athletes (p<.05). 3. Dominant knee flexion peak torque (Nm) were no significant differences in man but man elite athletes were higher than woman elite players in 60 deg/sec (p<.05). 4. Dominant knee flexion peak torque (% body weight) of man elite athletes were higher than woman elite players in 60 deg/sec (p<.05). 5. Knee flexion/extension peak torque ratio (H : Q) were no significant differences according to sex and proper H : Q ratio was 54~64%.

Normative Data of Functional Hamstring/Quadriceps Ratios by Age Based on Isokinetic Exercise Testing

OBJECTIVE: We tested peak torques of knee extensors and knee flexors using an isokinetic dynamometer (Cybex model 770) in middle-aged and aged populations, and calculated functional hamstring: quadriceps ratios (H/Q ratios) and conventional hamstring: quadriceps ratios. We present the normative data of these parameters in decade age groups for both sexes. METHOD: Using an isokinetic dynamometer we determined the peak torques of knee extensors and knee flexors at angular velocities of 30, 60 and 180 degrees/sec in normal people (120 males, 154 females in the age range 31 to 70 years) and using these peak torque values to calculate functional H/Q ratios and conventional H/Q ratios. RESULTS: Normative data were presented. As age increased, the magnitudes of the peak torques of most knee flexors and knee extensors decreased, but conventional and functional H/Q ratios were not found to be significantly correlated with age in either sex. CONCLUSION: Normative data by decade age in both sexes were obtained. It is hoped that this data will be beneficial for the testing of knee joint function.