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Workout-Life Balance: How Psychological Stress Affects Force Production in Competitive Powerlifters and Healthy Controls

metronomes. Outcome measures assessed during the concentric phase were: average concentric velocity (ACV), peak concentric velocity (PCV), rating of perceived exertion (RPE), range of motion (ROM), and barbell path. A one-way ANOVA and Pearson’s Product Moment correlations were used for analysis with significance set at p≤0.05. RESULTS: Eccentric duration was significantly and inversely correlated with average concentric velocity (ACV) at 60% (r = -0.408) and 80% (r = -0.477) of 1RM squat and at 100% (r = 0.604) of 1RMM bench press. At 60% of 1RM squat, both fast and slow eccentric conditions produced greater (p<0.001) peak concentric velocity (PCV) than normative duration with fast also producing greater PCV than slow (p=0.044). Eccentric duration had no impact on RPE, ROM, or barbell path. CONCLUSIONS: Therefore, our results show that well-trained athletes performing a deliberately faster eccentric phase may enhance squat and bench press performance. However, caution should be used when interpreting these results as athletes who already perform a fast eccentric duration may not benefit from deliberately increasing eccentric velocity.