Abstract
The immediate and delayed influence of exercise of variable type, duration and intensity on the serum γ-glutamyl transpeptidase activity (γ-GT) has been examined in athletes and untrained persons. The possible effects of exercise-induced changes in other parameters (plasma free glutamate, serum triglyceride, haemoconcentration) on the measured postexercise serum γ-GT have been discussed, partly on the basis of our own experimental data. It appears that neither exercise itself, nor any one of the above mentioned factors (excepting a slight, transient effect of haemoconcentration after brief, intensive exertion) have noticeable influence on serum γ-GT. Determinations of this enzyme for diagnostic purposes are therefore likely to be used without regard to acute and chronic exercise history in man.
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