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Creatine supplementation does not improve physical performance in a 150 m race
C Javierre1, M A Lizarraga, J L Ventura
1Depto. de Ciencias Fisiológicas y Nutrición, Facultad de Medicina, Universidad de Barcelona, Spain.
Revista Espanola De Fisiologia
|May 23, 1998
Summary
Creatine supplementation did not enhance 150m sprint performance in national-class sprinters. While plasma creatinine increased, physical performance metrics remained unaffected by the three-day creatine monohydrate regimen.
Area of Science:
- Sports Science
- Exercise Physiology
- Biochemistry
Background:
- Creatine is known to improve high-intensity exercise performance.
- The effects of creatine supplementation on sprinters are not fully understood.
Purpose of the Study:
- To investigate the impact of creatine supplementation on 150m sprint performance.
- To analyze changes in plasma creatine and lactate concentrations.
Main Methods:
- Twelve national-class sprinters participated in a double-blind, placebo-controlled study.
- Participants completed two 150m sprints: one before and one after three days of creatine monohydrate (25g/day) or placebo supplementation.
Main Results:
- Plasma creatinine levels significantly increased in the creatine group both before and after the sprint.
- No significant improvement in 150m sprint performance was observed with creatine supplementation.
- Plasma lactate concentrations were also analyzed.
Conclusions:
- Three days of creatine supplementation did not enhance 150m sprint performance in this group of sprinters.
- Elevated plasma creatinine confirms creatine uptake but does not correlate with performance improvement in this context.