Beta-alanine supplementation augments muscle carnosine content and attenuates fatigue during repeated isokinetic contraction bouts in trained sprinters
Randomised controlled trialHumansWith beta-alanine (carnosine precursor)
This study tested carnosine together with beta-alanine (carnosine precursor). Its results cannot be assigned to carnosine alone. More combination studies.
- Design
- Randomised controlled trial
- Subjects
- 15 male 400 m sprint-trained athletes (placebo-controlled, double-blind)
- Dose used in the study
- 4.8 g/day beta-alanine
- Duration
- 4 weeks
- What was measured
- Soleus and gastrocnemius carnosine by proton MRS; isokinetic knee-extension torque over five bouts; isometric endurance; 400 m race time.
What the authors reported
Beta-alanine raised soleus carnosine by about 47% and gastrocnemius carnosine by about 37%; placebo produced no soleus change and a small gastrocnemius rise of about 16%. Beta-alanine improved dynamic knee-extension torque in the fourth and fifth isokinetic bouts. It did not improve isometric endurance or 400 m race time.
Limits of this study
Small sample; four-week duration. Full text not read.
Source
PubMed 17690198 · doi:10.1152/japplphysiol.00397.2007
Entry checked against PubMed abstract (E-utilities) on 2026-10-19. The dose shown is the dose the researchers used. It is not a recommendation. How to read this page.