Caffeine Supplementation and Strength Endurance in Brazilian Jiu-jitsu Athletes

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.

NCT Number	NCT07479875
Lead Sponsor	Federal University of Minas Gerais Collaborators: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior.
Conditions	Muscle Strength, Physical Endurance, Exercise
Enrollment	15 participants
Start Date	2025-12-12
Primary Completion	2026-01-15 (estimated)
Study Completion	2026-01-15 (estimated)
Updated on ClinicalTrials.gov	2026-03-18