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This study investigated whether a warm-up exercise consisting of 100 submaximal concentric contractions would attenuate delayed-onset muscle soreness (DOMS) and decreases in muscle strength associated with eccentric exercise-induced muscle damage. Ten male students performed two bouts of the elbow flexor exercise consisting of 12 maximal eccentric contractions with a warm-up exercise for one arm (WU) and without warm-up for the other arm (control: CON) in a randomised, counterbalanced order separated by 4 weeks. Muscle temperature of the biceps brachii prior to the exercise was compared between the arms, and muscle activity of the biceps brachii during the exercise was assessed by surface integral electromyogram (iEMG). Changes in visual analog scale for muscle soreness an