Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2009) 08, 591 - 599

Research article
Effects of Sodium Phosphate Loading on Aerobic Power and Capacity in off Road Cyclists
Milosz Czuba1, , Adam Zajac1, Stanislaw Poprzecki2, Jaroslaw Cholewa1, Scott Woska3
Author Information
1 Department of Sports Training, Academy of Physical Education, Katowice, Poland
2 Department of Biochemistry, Academy of Physical Education, Katowice, Poland
3 Galen Medical Institute, Bierun, Poland

Milosz Czuba
✉ Academy of Physical Education, 40-064 Katowice, Mikołowska 72A, Poland
Email: m.czuba@awf.katowice.pl
Publish Date
Received: 31-07-2009
Accepted: 18-09-2009
Published (online): 01-12-2009
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ABSTRACT

The main aim of this paper was to evaluate the effects of short- term (6 days) phosphate loading, as well as prolonged (21 days) intake of sodium phosphate on aerobic capacity in off-road cyclists. Nineteen well-trained cyclists were randomly divided into a supplemental (S) and control group (C). Group S was supplemented for 6 days with tri-sodium phosphate, in a dose of 50 mg·kg-1 of FFM/d, while a placebo was provided for the C group. Additionally, group S was further subjected to a 3-week supplementation of 25 mg·kg-1 FFM/d, while group C received 2g of glucose. The results indicate a significant (p < 0.05) increase in VO2max, VEmax, and O2/HR, due to sodium phosphate intake over 6 days. Also a significant (p < 0.05) decrease in HRrest and HRmax occurred. The supplementation procedure caused a significant increase (p < 0.05) in Pmax and a shift of VAT towards higher loads. There were no significant changes in the concentration of 2,3-DPG, acid-base balance and lactate concentration, due to phosphate salt intake.

Key words: Tri-sodium phosphate, 2,3- diphosphoglycerate, oxygen uptake, off road cyclists.


           Key Points
  • Studies on bone acute biochemical response to loading have yielded unequivocal results.
  • There is a paucity of research on the biochemical bone response to high impact exercise.
  • An increase in bone turnover was observed one to two days post exercise.
 
 
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