The Effects of 6 Weeks of L. Supplementation on Body Composition, Hormonal Response, Perceived Exertion, and CrossFit Performance: A Randomized, Single-Blind, Placebo-Controlled Study.

L. () supplementation have been shown to enhance sports performance in many but not all studies. Moreover, data regarding the potential impact of supplementation on CrossFit endurance is limited. This study aimed to determine whether supplementation improve body composition, hormonal response, and performance among CrossFit athletes. In a randomized, single-blind, placebo-controlled trial, a total of 30 healthy CrossFit-trained males were randomly allocated to receive either 770 mg of supplementation or a placebo daily for 6 weeks. Body mass, fat mass, fat composition, testosterone and cortisol levels, and CrossFit performance (5 common Workouts of the Day: back squat, bench press, dead lift, Grace, and CrossFit Total) were assessed before and after intervention. There were no significant group x time interactions for the outcomes of the study except for testosterone levels and bench press performance ( < 0.05). supplementation did not impact enhance performance or body composition in CrossFit male athletes. However, supplementation may act as a testosterone booster helping the recovery after physical loads and mitigating fatigue.