Author/Authors :
Ghiasvand، Reza نويسنده Department of Community Nutrition, School of Nutrition and Food Sciences, Food Security Research Center,Isfahan University of Medical Sciences, Isfa , , Askari، Gholamreza نويسنده , , Malekzadeh، Janmohamad نويسنده Department of Nutrition, School of Health, Yasouj University of Medical Sciences, Yasouj , , Hajishafiee، Maryam نويسنده Department of Community Nutrition, School of Nutrition and Food Sciences, Food Security Research Center,Isfahan University of Medical Sciences, Isfa , , Daneshvar، Pooya نويسنده Esfahan Sport Medicine Association, Isfahan , , Akbari، Fahimeh نويسنده Department of Community Nutrition, School of Nutrition and Food Sciences, Food Security Research Center,Isfahan University of Medical Sciences, Isfa , , Bahreynian، Maryam نويسنده Department of Community Nutrition, School of Nutrition and Food Sciences, Food Security Research Center,Isfahan University of Medical Sciences, Isfa ,
Abstract :
Objectives: Supplementation with B-alanine has been proposed
to improve performance in some exercises such as cycling and
running. Also, it has been demonstrated that great deals of
proton ions are produced in the skeletal muscles during exercise
that result in acidosis, whereas B-alanine may reduce this effect.
Therefore, the aim of this study is to assess the effects of alanine
supplementation on VO2 max, time to exhaustion and lactate
concentrations in physical education male students.
Methods: Thirty-nine male physical education students
volunteered for this study. Participants were supplemented orally
for 6 week with either B-alanine (5*400 mg/d) or placebo (5*400 mg
dextrose/d), randomly. VO2 max and time to exhaustion (TTE) with
a continuous graded exercise test (GXT) on an electronically braked
cycle ergometer; and serum lactate and glucose concentrations
were measured before and after supplementation.
Results: Supplementation with B-alanine showed a significant
increase in VO2 max (P < 0.05) and a significant decrease in TTE
and lactate concentrations (P < 0.05). A significant elevation in
lactate concentrations and a non significant increase in TTE were
observed in placebo group. Plasma glucose concentrations did not
change significantly in two groups after intervention.
Conclusion: It can be concluded that B-alanine supplementation
can reduce lactate concentrations during exercise and thus can
improve exercise performance in endurance athletes.
