[The influence of muscular activity on the activity of acid proteinases and acid phosphatase in the muscles and liver].

Different shifts of the skeletal muscle and the liver acid proteinases and acid phosphatase during exercise were observed. The increased activity of acid proteinases in trained animals cannot be accounted for by any lyzosome disruption, which is more stable at exercise in trained animals. The data obtained indicate a better preservation of biochemical homeostasis in skeletal muscles of the animals adapted to prolonged exhaustive physical work.