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Oral creatine supplementation's decrease of blood lactate during exhaustive, incremental cycling.

Jonathan M Oliver1, Dustin P Joubert, Steven E Martin

  • 1Dept. of Kinesiology, Texas Christian University, Fort Worth, TX, USA.

International Journal of Sport Nutrition and Exercise Metabolism
|November 21, 2012
PubMed
Summary
This summary is machine-generated.

Creatine supplementation reduced blood lactate levels during incremental cycling exercise and showed a trend toward increasing the lactate threshold. This suggests potential benefits for endurance athletes seeking improved performance.

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Area of Science:

  • Exercise Physiology
  • Nutritional Biochemistry
  • Sports Science

Background:

  • Creatine is a popular supplement for enhancing high-intensity exercise performance.
  • Its effects on endurance exercise, particularly concerning lactate metabolism, require further investigation.

Purpose of the Study:

  • To investigate the impact of short-term creatine supplementation on blood lactate accumulation during incremental cycling exercise.
  • To assess changes in lactate threshold, maximal power output, and exercise duration following creatine intake.

Main Methods:

  • Thirteen male subjects underwent incremental cycling tests to exhaustion before and after six days of creatine supplementation.
  • Blood lactate concentrations were measured at each exercise stage.
  • Lactate threshold was defined as the exercise stage preceding a blood lactate concentration of 4 mmol/L.

Main Results:

  • Creatine supplementation significantly reduced blood lactate concentrations during exercise (p = .041).
  • A trend towards increased power at lactate threshold (p = .11) and maximal power output (p = .082) was observed.
  • Total exercise time to fatigue also showed a tendency to increase (p = .056).

Conclusions:

  • Short-term creatine supplementation effectively lowers blood lactate levels during incremental cycling.
  • Creatine supplementation may enhance endurance capacity by potentially increasing lactate threshold and time to fatigue.
  • These findings suggest creatine supplementation could be beneficial for endurance athletes.