title: Enhancement of High-Intensity Actions and Physical Performance During a Simulated Brazilian Jiu-Jitsu Competition With a Moderate Dose of Caffeine.
abstract: BACKGROUND
  Although caffeine is one of the most commonly used substances in combat sports, information about its ergogenic effects on these disciplines is very limited.
  
  
  OBJECTIVE
  To determine the effectiveness of ingesting a moderate dose of caffeine to enhance overall performance during a simulated Brazilian jiu-jitsu (BJJ) competition.
  
  
  METHODS
  Fourteen elite BJJ athletes participated in a double-blind, placebo-controlled experimental design. In a random order, the athletes ingested either 3 mg/kg body mass of caffeine or a placebo (cellulose, 0 mg/kg) and performed 2 simulated BJJ combats (with 20 min rest between them), following official BJJ rules. Specific physical tests such as maximal handgrip dynamometry, maximal height during a countermovement jump, permanence during a maximal static-lift test, peak power in a bench-press exercise, and blood lactate concentration were measured at 3 specific times: before the first combat and immediately after the first and second combats. The combats were video-recorded to analyze fight actions.
  
  
  RESULTS
  After the caffeine ingestion, participants spent more time in offensive actions in both combats and revealed higher blood lactate values (P < .05). Performance in all physical tests carried out before the first combat was enhanced with caffeine (P < .05), and some improvements remained after the first combat (eg, maximal static-lift test and bench-press exercise; P < .05). After the second combat, the values in all physical tests were similar between caffeine and placebo.
  
  
  CONCLUSIONS
  Caffeine might be an effective ergogenic aid for improving intensity and physical performance during successive elite BJJ combats.
authors.forename: Francisco Javier
authors.initials: FJ
authors.lastname: Diaz-Lara
authors.forename: Juan
authors.initials: J
authors.lastname: Del Coso
authors.forename: Javier
authors.initials: J
authors.lastname: Portillo
authors.forename: Francisco
authors.initials: F
authors.lastname: Areces
authors.forename: Jose Manuel
authors.initials: JM
authors.lastname: García
authors.forename: Javier
authors.initials: J
authors.lastname: Abián-Vicén
mesh_terms: D000328:Adult; D054874:Athletic Performance / Q000502:physiology*; D002110:Caffeine / Q000008:administration & dosage*; D000697:Central Nervous System Stimulants / Q000008:administration & dosage*; D003163:Competitive Behavior / Q000187:drug effects* / Q000502:physiology; D004311:Double-Blind Method; D005080:Exercise Test; D018737:Hand Strength / Q000502:physiology; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D016139:Martial Arts / Q000502:physiology*
chemical_list: D000697:Central Nervous System Stimulants; D019344:Lactic Acid; D002110:Caffeine
keywords: ergogenic aids; exercise; fight; stimulants