Caffeinated Energy Drinks Improve Volleyball Performance in Elite Female Players.

• Autores: Alberto Pérez López, Juan del Coso Garrigós, Juan José Salinero Martín, Javier Abián Vicén, David Valadés Cerrato, Cristina Gonzalez, Beatriz Lara, Cesar Hernandez, Francisco Areces Corcuera
• Localización: Medicine & Science in Sports & exercise: Official Journal of the American College of Sports Medicine, ISSN 0195-9131, Vol. 47, Nº. 4, 2015, págs. 850-856
• Idioma: inglés
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• Dialnet Métricas: 2 Citas
• Resumen

  • AB Purpose: The objective of this study is to determine the effects of a caffeine-containing energy drink on female volleyball players' performance. Methods: Thirteen elite female volleyball players ingested 3 mg[middle dot]kg-1 of caffeine with an energy drink or the same drink without caffeine (placebo drink) in a double-blind and randomized study. Then, participants performed the following: standing spike, jumping spike, spike jump, blocking jump, squat jump, countermovement jump, manual dynamometry, and the agility t-test. A simulated volleyball game was played, videotaped, and notated afterward. Results: In comparison to the placebo drink, the ingestion of the caffeinated energy drink increased the ball velocity in the standing spike (19.2 +/- 2.1 vs 19.7 +/- 1.9 m[middle dot]s-1, P = 0.023) and in the jumping spike (17.9 +/- 2.2 vs 18.8 +/- 2.2 m[middle dot]s-1, P = 0.038) and the jump height in the squat jump (28.1 +/- 3.2 vs 29.4 +/- 3.6 cm, P = 0.028), countermovement jump (32.0 +/- 4.6 vs 33.1 +/- 4.5 cm, P = 0.018), spike jump (43.3 +/- 4.7 vs 44.4 +/- 5.0 cm, P = 0.025), and block jump (35.2 +/- 5.1 vs 36.1 +/- 5.1 cm, P = 0.044). Furthermore, the caffeinated energy drink decreased the time needed to complete the agility t-test (11.1 +/- 0.5 vs 10.9 +/- 0.3 s, P = 0.036). During the game, the volleyball actions categorized as successful were more frequent with the caffeinated energy drink (34% +/- 9% vs 45% +/- 9%, P < 0.001), whereas imprecise actions decreased (28% +/- 7% vs 14% +/- 9%, P < 0.001) when compared with the placebo drink. Conclusion: Commercially available energy drinks can significantly improve physical performance in female volleyball players. Increased physical performance led to improved accuracy during an actual volleyball match.