Hamstrings strength imbalance in professional football (soccer) players in Australia

The goal of this study was to describe the isokinetic thigh muscle strength profile of professional male football players in Australia. Concentric (60° and 240°/second) and eccentric (30° and 120°/second) hamstrings and quadriceps isokinetic strength was assessed with a HUMAC NORM dynamometer. The primary variables were bilateral concentric and eccentric hamstring and quadriceps peak torque ratios, concentric hamstring-quadriceps peak torque ratios, and mixed ratios (eccentric hamstring 30°/second ÷ concentric quadriceps 240°/second). Hamstring strength imbalance was defined as deficits in any two of: bilateral concentric hamstring peak torque ratio < 0.86, bilateral eccentric hamstring peak torque ratio < 0.86, concentric hamstring-quadriceps ratio < 0.47, mixed ratio < 0.80. Fifty-five strength tests involving 42 players were conducted. Ten players (24%) were identified as having hamstring strength imbalance. Athletes with strength imbalance had significantly lower concentric and eccentric bilateral hamstring peak torque ratios at all angular velocities tested; and decreased eccentric quadriceps peak torque (30°/second) in their stance leg, in comparison to those without strength imbalance. Approximately one in four players had preseason hamstring strength imbalance; and all strength deficits were observed in the stance leg.

Concentric and eccentric hamstrings strength imbalance could affect in-season football performance, and might have implications for the future risk of injury.

Global Health Course

Global Health is fast becoming a priority of all health organisations. Get ahead of the curve, take part in this course and help improve health around the world.

Speak your mind

Your email will not be published.