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BACKGROUND:

Muscle strength in the upper and lower limbs is a major contributing factor to punch force and is one of the keys to success in boxing.

OBJECTIVE:

This study aimed to investigate the relationship between knee and shoulder strength and punching force in boxers.

METHODS:

Twenty-one boxers completed knee flexion, knee extension, shoulder external rotation and internal rotation isokinetic concentric contractions at slow (60∘/s) and fast (180∘/s) angular velocities. Maximal punch force tests included lead and rear straight arm punching were assessed using a force platform.

RESULTS:

Pearson’s correlation coefficients revealed that knee extension (r= 0.646–0.848) and knee flexion (r= 0.470–0.646) peak torques were moderately to very strongly correlated with maximal punching force in lead and rear arms. The shoulder internal rotation (r= 0.492–0.634) and shoulder external rotation (r= 0.441–0.588 …