Effects of warm-up on blood gases, lactate and acid-base status during sprint swimming

International Journal of Sports Medicine
R A RobergsJ A Davis

Abstract

A standardized 200-m front crawl sprint swim (SpS) was used to evaluate the effects of warm-up on pH, blood gases, and the concentrations of lactate ([La-]) and bicarbonate ([HCO3-]) in arterialized and venous blood. Eight trained male swimmers performed two randomly assigned 200-m front crawl swims at previously determined intensities corresponding to 120% VO2max. One swim was preceded by a warm-up (WU trial) which consisted of a 400-m front crawl swim (82% VO2max), 400-m flutter kicking (45% VO2max), and 4 x 50-m front crawl sprints (111% VO2max). The second was performed without warm-up (NWU trial). Blood was sampled from a hyperemized earlobe and an antecubital vein before the warm-up, 9 min after the warm-up (1 min before the swim), immediately following the SpS, and at 2, 5, 10, and 20 min after the SpS. The warm-up exercise resulted in a higher pre-SpS [La-] in arterialized blood (3.1 +/- 0.4 and 1.7 +/- 0.4 mmol x l-1, p less than 0.05), a higher hydrogen ion concentration ([H+]) in venous blood (45.9 +/- 0.9 and 42.2 +/- 0.8 nmol x l-1, p less than 0.001), and a lower arterialized blood [HCO3-] (25.1 +/- 0.9 and 22.2 +/- 0.8 mmol x l-1, p less than 0.05). The SpS was accompanied with higher heart rates during the WU tr...Continue Reading

Citations

Dec 1, 1995·Journal of Sports Sciences·D Rosenbaum, E M Hennig
Nov 2, 2013·Sports Medicine·Henrique P NeivaDaniel A Marinho
Jan 1, 1994·European Journal of Applied Physiology and Occupational Physiology·V BillatA P Chassain
May 13, 2005·Journal of Science and Medicine in Sport·S H MandengueS Ahmaidi
Nov 11, 2003·Sports Medicine·Andrew M JonesMark Burnley
Aug 1, 2020·Journal of Strength and Conditioning Research·Valentin BottollierJacques Prioux

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