FSH (50 mu/rat X 12 days), ICSH (in the same dosis) and gonadotropinum sericum (20 U/rat X 13 days) have a prevailing inhibitory influence on the motor activity in untrained or/and trained rats. TSH raises the motor performance but significantly only in great doses (1.5 IU/100g body weight X 13 days). GH (0.1 and 0.5 mg/rat X 16 days) reduces the favourable effects of moderate training on the run performance. A part of these results could be explained by the studied biochemical changes.
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