ß-Alanine Supplementation Improves Throwing Velocities in Repeated Sprint Ability and 200-m Swimming Performance in Young Water Polo Players.

Pediatric exercise science

PubMedID: 28121265

Claus GM, Redkva PE, Brisola GM, Malta ES, de Poli RA, Miyagi WE, Zagatto AM. ß-Alanine Supplementation Improves Throwing Velocities in Repeated Sprint Ability and 200-m Swimming Performance in Young Water Polo Players. Pediatr Exerc Sci. 2017;1-27.
The purpose of this study was to investigate the effects of ß-alanine supplementation on specific tests for water polo. Fifteen young water polo players (16±2years) underwent a 200-m swimming performance, repeated-sprint ability test (RSA) with free throw (shooting), and 30-s maximal teth-ered eggbeater kicks. PARTICIPANTS
were randomly allocated into two groups (placebo x ß-alanine) and supplemented with 6.4g·day(-1) of ß-alanine or a placebo for six weeks. The mean and total RSA times, the magnitude based inference analysis showed a likely beneficial effect for ß-alanine sup-plementation (both 79. 9%). The ball velocity measured in the throwing performance after each sprint in the RSA presented a very like beneficial inference in the ß-alanine group for mean (96. 4%) and percentage decrement of ball velocity (92. 5%, likely beneficial). Furthermore, the percentage change for mean ball velocity was different between groups (ß-alanine=+2. 5% and placebo=-3. 5%) (p=. 034). In the 30-s maximal tethered eggbeater kicks the placebo group presented decreased peak force, mean force, and fatigue index, while the ß-alanine group maintained performance in mean force (44. 1%, possibly beneficial), only presenting decreases in peak force. The 200-m swimming performance showed a possibly beneficial effect (68. 7%). Six weeks of ß-alanine supplementation was effective for improving ball velocity shooting in the RSA, maintaining performance in the 30-s test, and providing possibly beneficial effects in the 200-m swimming performance.