[Variations in serum myoglobin due to physical exertion].

We studied the behaviour of serum myoglobin and of serum enzymes in 25 young men, before and after physical stress. The stress appeared to markedly increase myoglobin, aldolase and CK activity and to a lesser extent GOT. Myoglobin, aldolase return to normal levels within 24 hours but CK appeared to decrease more slowly. The simultaneous determination of some organic-specific enzymes (CK-MB, gamma-GT, GPT) permitted us to state that the myocardium and liver are not involved in the increase of tests following muscular stress.