This study examined the effects of association and both internal and external dissociation on the performance, perceived fatigue, and rate of exertion of recreational swimmers during two swimming trials. Before the first swim, 69 participants completed a self-report questionnaire. After the first swim, participants were assigned to one of four groups equated with swim performance times: control, associative, internal dissociative, and external dissociative groups. After completing both the first and second swims, participants completed the Rate of Perceived Exertion, Perceived Fatigue Test, and Subjective Appraisal of Cognitive Strategies. Results showed that the group assigned to the associative strategy swam significantly faster (p < .05) than the control group. No changes were found in perceived fatigue and perceived rating of exertion among the groups between the first and second swim. These findings support the position that associative thinking is an important cognitive strategy in timed performances.