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Lactate acidosis with different forms of sports activities

, : Lactate acidosis with different forms of sports activities. Canadian Journal of Applied Sport Sciences 2(4): 177-182

Several sports (16) were compared relative to their maximal metabolic acidosis. The subjects were exclusively male athletes and the different sports were generally performed under extreme competitive conditions. The greatest lactate acidosis with pH values of under 6.9 and lactate levels up to 25 mmol/l were found in the arterial blood of well-trained, elite athletes under acute physiological stress of 1-2 minutes in duration (400, 500 and 800 m running). In spite of similarly long exercise durations, the lactate acidosis in such other forms of dyanmic exercise as swimming or ice skating was essentially less pronounced. Lactate concentrations over 20 mmol/l and pH values less than 7.0 in arterial blood were infrequently bound. In swimming, this difference was primarily explained by a smaller active muslce mass. With ice skating, an acidosis that was too high would negatively affect the skating technique and therefore the performance; ice skating requires a much greater amount of static muscle work. In sports with large components of psychological stress, such as auto racing, bobsledding, parachute jumping and apline skiing, the elevated lactate level was largely caused by the increased secretion of catecholamines, with its resulting stimulation of glycogenolysis and glycolysis.


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