Metabolic alkalosis, recovery and sprint performance.
Pre-exercise alkalosis and an active recovery improve the physiological state of recovery through slightly different mechanisms (e. g. directly increasing extracellular bicarbonate (HCO3 (-)) vs. increasing blood flow), and combining the two conditions may provide even greater influence on blood acid-base recovery from high-intensity exercise. Nine subjects completed four trials (Placebo Active ( PLAC A), sodium bicarbonate (NaHCO3) Active ( BICARB A), Placebo Passive ( PLAC P) and NaHCO3 Passive ( BICARB P)), each consisting of three, 30-s maximal efforts with a three min recovery between each effort. Pre-exercisealkalosis was evident in both NaHCO3 conditions, as pH and HCO3 (-) were significantly higher than both Placebo conditions (pH: 7.46 ± 0.04 vs. 7.39 ± 0.02; HCO3 (-): 28.8 ± 1.9 vs. 23.2 ± 1.4  mmol·L (-1); p<0.001). In terms of performance, significant interactions were observed for average speed (p<0.05), with higher speeds evident in the BICARB A condition (3.9 ± 0.3 vs. 3.7 ± 0.4  m·s (-1)). Total distance covered was different (p=0.05), with post hoc differences evident between the BICARB A and PLAC P conditions (368 ± 33 vs. 364 ± 35 m). These data suggest that successive 30-s high intensity performance may be improved when coupled with NaHCO3 supplementation.
Siegler
J C
JC
Sport, Health and Exercise Science, University of Hull, Department of Sport,Health and Exercise Science, United Kingdom. J.Siegler@hull.ac.uk
McNaughton
L R
LR
Midgley
A W
AW
Keatley
S
S
Hillman
A
A
D000136:Acid-Base Equilibrium / Q000502:physiology*; D000471:Alkalosis / Q000378:metabolism*; D054874:Athletic Performance / Q000502:physiology*; D001639:Bicarbonates / Q000378:metabolism*; D005110:Extracellular Space / Q000378:metabolism; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D020127:Recovery of Function / Q000502:physiology; D012420:Running / Q000502:physiology; D016037:Single-Blind Method; D017693:Sodium Bicarbonate / Q000008:administration & dosage
D001639:Bicarbonates; D017693:Sodium Bicarbonate