NDLI: Effects of sodium phosphate and beetroot juice supplementation on repeated-sprint ability in females

Content Provider	Springer Nature Link
Author	Buck, Christopher L. Henry, Timothy Guelfi, Kym Dawson, Brian McNaughton, Lars R. Wallman, Karen
Copyright Year	2015
Abstract	Sodium phosphate (SP) and beetroot juice (BJ) supplementation was assessed on repeated-sprint ability (RSA).Thirteen female team-sport participants completed four trials: (1) SP and BJ (SP + BJ), (2) SP and placebo (for BJ), (3) BJ and placebo (for SP) and (4) placebo (for SP + BJ), with ~21 days separating each trial. After each trial, participants performed a simulated team-game circuit (STGC) consisting of four 15 min quarters, with a 6 × 20-m repeated-sprint set performed at the start, half-time and end.Total sprint times were between 0.95–1.30 and 0.83–1.12 s faster for each RSA set and 3.25 and 3.12 s faster overall (~5 % improvement) after SP compared with placebo and BJ, respectively (p = 0.02 for sets 1, 2 and overall; Cohen’s effect size: d = −0.51 to −0.90 for all sets and overall). Additionally, total sprint times were 0.48 s faster after SP + BJ compared with placebo (set 2; p = 0.05, ~2 % improvement). Furthermore, best sprints were 0.13–0.23 and 0.15–0.20 s faster (~6 % improvement; p < 0.01) after SP compared with placebo and BJ, respectively, for all sets (d = −0.54 to −0.89).SP improved RSA in team-sport, female athletes when fresh (set 1) and during the later sets of a STGC (sets 2 and 3). Specifically, total and best sprint times were faster after SP compared with placebo and BJ.
Starting Page	2205
Ending Page	2213
Page Count	9
File Format	PDF
ISSN	14396319
Journal	European Journal of Applied Physiology
Volume Number	115
Issue Number	10
e-ISSN	14396327
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-06-16
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ergogenic aids 20-m sprints Anaerobic energy Aerobic energy Team-sports Human Physiology Occupational Medicine/Industrial Medicine Sports Medicine
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physiology (medical) Public Health, Environmental and Occupational Health Sports Science

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