Email updates

Keep up to date with the latest news and content from JISSN and BioMed Central.

Journal App

google play app store
Open Access Research article

Effect of betaine supplementation on cycling sprint performance

J Luke Pryor1*, Stuart AS Craig2 and Thomas Swensen3

Author Affiliations

1 Department of Kinesiology, University of Connecticut, Storrs, CT 06269, U-1110, USA

2 DuPont Nutrition & Health, Tarrytown, NY, USA

3 Ithaca College, Ithaca, NY, USA

For all author emails, please log on.

Journal of the International Society of Sports Nutrition 2012, 9:12  doi:10.1186/1550-2783-9-12

Published: 3 April 2012

Abstract

Purpose

To examine the effect of betaine supplementation on cycling sprint performance.

Methods

Sixteen recreationally active subjects (7 females and 9 males) completed three sprint tests, each consisting of four 12 sec efforts against a resistance equal to 5.5% of body weight; efforts were separated by 2.5 min of cycling at zero resistance. Test one established baseline; test two and three were preceded by seven days of daily consumption of 591 ml of a carbohydrate-electrolyte beverage as a placebo or a carbohydrate-electrolyte beverage containing 0.42% betaine (approximately 2.5 grams of betaine a day); half the beverage was consumed in the morning and the other half in the afternoon. We used a double blind random order cross-over design; there was a 3 wk washout between trials two and three. Average and maximum peak and mean power were analyzed with one-way repeated measures ANOVA and, where indicated, a Student Newman-Keuls.

Results

Compared to baseline, betaine ingestion increased average peak power (6.4%; p < 0.001), maximum peak power (5.7%; p < 0.001), average mean power (5.4%; p = 0.004), and maximum mean power (4.4%; p = 0.004) for all subjects combined. Compared to placebo, betaine ingestion significantly increased average peak power (3.4%; p = 0.026), maximum peak power max (3.8%; p = 0.007), average mean power (3.3%; p = 0.034), and maximum mean power (3.5%; p = 0.011) for all subjects combined. There were no differences between the placebo and baseline trials.

Conclusions

One week of betaine ingestion improved cycling sprint power in recreationally active males and females.

Keywords:
Anaerobic power; Ergogenic aid; Creatine; Wingate