Effect of Sugar-Free Red Bull Energy Drink on High-Intensity Run Time-to-Exhaustion in Young Adults

• Autores: Darren G. Candow, Amanda K. Kleisinger, Stephanie Grenier, Kim D. Dorsch
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 23, Nº. 4, 2009, págs. 1271-1275
• Idioma: inglés
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• Dialnet Métricas: 3 Citas
• Resumen

  • Consuming sugar-free Red Bull energy drink before exercise has become increasingly popular among exercising individuals. The main purported active ingredient in sugar-free Red Bull is caffeine, which has been shown to increase aerobic exercise performance. The purpose of this study was to determine the effects of sugar-free Red Bull energy drink on high-intensity run time-to-exhaustion in young adults. Physically active university students (n = 17, 9 men, 8 woman; 21 ± 4 years, 73.4 ± 3.1 kg, 175.1 ± 3.2 cm) participated in a double-blind, crossover, repeated-measures study where they were randomized to supplement with sugar-free Red Bull (2 mg·kg-1 body mass caffeine or ~147 mg caffeine; 4 kcal/250 mL) and noncaffeinated, sugar-free placebo (lemon-lime flavored soft drink, tonic water, lime juice; 4 kcal/250 mL) separated by 7 days. Exercise capacity was assessed by a run time-to-exhaustion test at 80% [latin capital V with dot above]o2max, perceived exertion was assessed immediately after exercise, and blood lactate was measured before and after exercise. There were no differences in run time-to-exhaustion (Red Bull: 12.6 ± 3.8 minutes, placebo: 11.8 ± 3.4 minutes), perceived exertion (Red Bull: 17.1 ± 2.0, placebo: 16.6 ± 1.8), or blood lactate between groups. In conclusion, sugar-free Red Bull energy drink did not influence high-intensity run time-to-exhaustion in young adults.