Document Detail

Sodium phosphate supplementation and time trial performance in female cyclists.
MedLine Citation:
PMID:  25177171     Owner:  NLM     Status:  PubMed-not-MEDLINE    
This study investigated the effects of three doses of sodium phosphate (SP) supplementation on cycling 500 kJ (119.5 Kcal) time trial (TT) performance in female cyclists. Thirteen cyclists participated in a randomised, Latin-square design study where they completed four separate trials after ingesting either a placebo, or one of three different doses (25, 50 or 75 mg·kg(-1) fat free mass: FFM) of trisodium phosphate dodecahydrate which was split into four equal doses a day for six days. On the day after the loading phase, the TT was performed on a cycle ergometer. Serum phosphate blood samples were taken at rest both before and after each loading protocol, while a ~21 day washout period separated each loading phase. No significant differences in TT performance were observed between any of the supplementation protocols (p = 0.73) with average completion times for the 25, 50 or 75 mg·kg(-1) FFM being, 42:21 ± 07:53, 40:55 ± 07:33 and 40:38 ± 07:20 min respectively, and 40:39 ± 07:51 min for the placebo. Likewise, average and peak power output did not significantly differ between trials (p = 0.06 and p = 0.46, respectively). Consequently, 500 kJ cycling TT performance was not different in any of the supplementation protocols in female cyclists. Key PointsNo significant benefit of a 25, 50 or 75 mg·kg(-1) of FFM dose of sodium phosphate was found on 500 kJ (119.5 Kcal) TT cycle performance in female cyclists.Females of differing fitness levels responded similarly to sodium phosphate supplementation.Due to the possibility of individual responders to either the 50 or 75 mg·kg(-1) of FFM loading protocols, competitive cyclists should trial these doses prior to competition.
Christopher L Buck; Brian Dawson; Kym J Guelfi; Lars McNaughton; Karen E Wallman
Publication Detail:
Type:  Journal Article     Date:  2014-09-01
Journal Detail:
Title:  Journal of sports science & medicine     Volume:  13     ISSN:  1303-2968     ISO Abbreviation:  J Sports Sci Med     Publication Date:  2014 Sep 
Date Detail:
Created Date:  2014-09-01     Completed Date:  2014-09-01     Revised Date:  2014-09-03    
Medline Journal Info:
Nlm Unique ID:  101174629     Medline TA:  J Sports Sci Med     Country:  Turkey    
Other Details:
Languages:  eng     Pagination:  469-75     Citation Subset:  -    
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