Age-related Differences in Isokinetic Knee and Trunk Strength and Muscle Balance in Elite Male Soccer Players

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This research aims to analyze age-related differences in isokinetic knee and trunk strength and muscle balance among elite male soccer players.
91 elite male soccer players categorized into U14 (n=23), U17 (n=34), U20 (n=19), U23 (n=15) age groups
Isokinetic strength measured at speeds of 60°/s and 240°/s for knee extensors/flexors and 30°/s and 120°/s for trunk extensors/flexors
Data analyzed using one-way ANOVA and post-hoc testing (Scheffé or Games–Howell) based on homoscedasticity.
Significant strength differences found in knee and trunk extensors and flexors across age groups
Hamstring-quadriceps ratio showed lower values in older age groups at 60°/s, no significant difference at 240°/s
Differences in maximum torque angle and time to reach maximum torque were more pronounced at high speeds (240°/s)

Analyzes knee and trunk strength differences in elite male soccer players by age, indicating distinct functional characteristics.

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Yeo et al. (2026) studied this question.

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