![]() Although not significant, fat mass was reduced in BET compared to PLA. Muscle strength assessed during back squat significantly increased in BET ( p = 0.04) but not in the PLA group, however, there were no statistical differences between groups. Muscle performance was assessed using three different tests: 3-RM back-squat for muscle strength, 2 km rowing test for aerobic capacity and Bergeron Beep Test for anaerobic capacity. ![]() Body composition and cellular hydration were estimated with skinfolds measurement and bioelectrical impendence before and after 6 weeks of training. Twenty-nine subjects matched for training status (4.16 ± 0.95 day/week) and body fat mass (12.66 ± 4.08%) were randomly assigned to a betaine (BET N = 14) or placebo group (PLA N = 15). We aim to investigate the effect of 6 weeks of betaine supplementation on body composition and muscle performance during CrossFit© training.
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