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Abstract
Background: Delayed onset muscle soreness (DOMS) is the most common symptom when ordinary individuals and athletes are exposed to unaccustomed physical activity, especially eccentric contraction which impairs athletic performance; ordinary people work ability and physical functioning. A multitude of methods have been investigated to control DOMS. One of the valuable method to control DOMS is repeated bout effect as a prophylactic method. Purpose: To compare the repeated bout effect of maximal isometric with submaximal eccentric contraction on induced DOMS. Methods: Sixty normal male volunteers were assigned randomly into three equal groups: group A (first study group): 20 subjects received submaximal eccentric contraction on non-dominant elbow flexors as a prophylactic exercise. group B (second study group):20 subjects received maximal isometric contraction on non-dominant elbow flexors as a prophylactic exercise. group C (control group):20 subjects did not receive any prophylactic exercises