Purpose: To examine differences in fitness test performance and the attributions made for the performances between high school students of different weight status. Methods: High school students (n = 185) completed the Progressive Aerobic Cardiovascular Endurance Run and the push-up fitness tests and then completed the modified Causal Dimension Scale to assess their attributions for their performances. Results: Students of a healthy weight performed higher than overweight/obese students on both fitness tests. There were no significant differences in attribution dimension scores for either test between healthy weight and overweight/obese students. Student performance played a significant role on the attribution dimension scores for both tests. Students primarily attributed their push-up and Progressive Aerobic Cardiovascular Endurance Run performance to ability. Conclusion: As student performance is significantly associated with attribution dimension scores, improving fitness test performance should subsequently foster adaptive attributions, creating a high expectancy for future success.