The effectiveness of two energy drinks on selected indices of maximal cardiorespiratory fitness and blood lactate levels in male athletes
2010

Effect of Energy Drinks on Fitness in Male Athletes

Sample size: 10 publication Evidence: moderate

Author Information

Author(s): Nader Rahnama, Abbas Ali Gaeini, Fahimeh Kazemi

Primary Institution: University of Isfahan

Hypothesis

Do Red Bull and Hype energy drinks improve cardiorespiratory fitness and blood lactate levels in male athletes?

Conclusion

Red Bull and Hype energy drinks improve some aspects of cardiorespiratory fitness but do not affect blood lactate levels.

Supporting Evidence

  • Red Bull and Hype increased VO2max by 11.5% and 9.9% compared to placebo.
  • Time to exhaustion improved by 10.5% with Red Bull and 9.7% with Hype compared to placebo.
  • No significant changes in heart rate were observed after consuming the drinks.
  • Blood lactate levels did not significantly change after exercise.

Takeaway

Drinking Red Bull or Hype before exercising can help athletes run longer and breathe better, but it doesn't change their blood lactate levels.

Methodology

Ten male athletes performed treadmill tests after consuming either Red Bull, Hype, or a placebo drink.

Limitations

The study had a small sample size and only included male athletes.

Participant Demographics

Ten male student athletes, average age 22.4 years.

Statistical Information

P-Value

p = 0.001 for VO2max, p = 0.000 for time to exhaustion

Statistical Significance

p<0.05

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