This study investigated the acute effects of ingesting 400 mg of caffeine administered 30 minutes before Brazilian jiu-jitsu-specific strength endurance tests. Experienced athletes completed two conditions, placebo and caffeine, in a randomized, double-blind, crossover clinical trial. Performance was assessed using the dynamic component of the kimono grip strength test (maximum number of repetitions, MNR) and the isometric component (maximum static lift, MSL), both performed with a gi grip. Rating of perceived exertion, adverse effects, and blinding effectiveness were also evaluated.
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Dynamic component of the Kimono Grip Strength Test (Maximum Number of Repetitions, MNR)
Timeframe: During each experimental session, following intervention administration (two sessions, approximately 7 days apart).
Isometric component of the Kimono Grip Strength Test (Maximum Static Lift, MSL)
Timeframe: During each experimental session, following intervention administration (two sessions, approximately 7 days apart).