Adaptation Cardio-Respiratoire À L'Exercice Musculaire Pendant L'Intoxication Éthylique

AbstractAn ethylic intoxication corresponding to a blood rate of 1.5 to 2 g %0 is induced in ten healthy men. The influence of ethanol is studied during a muscular exercise consisting in walking and running on a treadmill; the intensity of the exercise is increasing by successives levels up to exhaustion.The ethylic intoxication lowers the maximum mechanical work the subjects are able to perform, as well as their maximum oxygen uptake. This limitation seems to be explained by the locomotor ataxia induced by ethanol ingestion.When exercise intensity requires an oxygen uptake over 1.5 li-ter/min, the oxygen uptake for a same mechanical work is reduced under alcohol influence. This observation implies that, during exercise, an energetic or mechanical efficiency change occurs the origin of which is discussed.The increase of heart rate at the same oxygen uptake, observed during ethylic intoxication may be explained by a cutaneous vasodilatation, lowering muscular blood flow.