Effects of sodium phosphate loading on aerobic power and capacity in off road cyclists

the main aim of this paper was to evaluate the effects of shortterm(6 days) phosphate loading, as well as prolonged (21 days)intake of sodium phosphate on aerobic capacity in off-roadcyclists. nineteen well-trained cyclists were randomly dividedinto a supplemental (s) and control group (c). group s wassupplemented for 6 days with tri-sodium phosphate, in a dose of50 mg·kg-1 of ffm/d, while a placebo was provided for the cgroup. additionally, group s was further subjected to a 3-weeksupplementation of 25 mg·kg-1 ffm/d, while group c received2g of glucose. the results indicate a significant (p < 0.05) increasein vo2max, vemax, and o2/hr, due to sodium phosphateintake over 6 days. also a significant (p < 0.05) decrease inhrrest and hrmax occurred. the supplementation procedurecaused a significant increase (p < 0.05) in pmax and a shift ofvat towards higher loads. there were no significant changes inthe concentration of 2,3-dpg, acid-base balance and lactateconcentration, due to phosphate salt intake.