Problem statement: Social comparison theory was used to examine if exercising with a research confederate posing as either high fit or low fit would increase the exertion in exercising. Approach: 91 college students were randomly assigned to one of three conditions: Biking alone, biking with a high fit confederate, or biking with a low fit confederate. All participants were instructed to complete 20 min of exercise at 60-70% of their maximum target heart rate. Results: Results indicated that

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... ticipants in the high fit condition exercised harder than those in the low fit condition. However, no mood differences emerged between conditions. Conclusion: Social comparison theory predicts exercise outcome such that participants gravitate towards the behavior (high fit or low fit) of those around them.