אימונים Metabolic Alkalosis, Recovery and Sprint Performance.

[Mike Bikov]

Int J Sports Med. 2010 Aug 11. [Epub ahead of print]
Metabolic Alkalosis, Recovery and Sprint Performance.

Siegler JC, McNaughton LR, Midgley AW, Keatley S, Hillman A.

Sport, Health and Exercise Science, University of Hull, United Kingdom.
Abstract

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 athree 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.​

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