[Thyroid state and thyrotropic function of the pituitary gland in sportsmen during veloergometric exercise]

The total and aerobic productivity, the content of the thyroid hormones, thyrotropin, lactate, and acid-base balance in the blood of 52 highly skilled sportsmen were studied in the process of veloergometric exercises of different intensity. It was shown that thyroxin and thyrotropin content increased and triiodothyronine concentration decreased in the blood plasma under the action of veloergometric exercises. A rise in cell metabolism and changes in the internal medium of the organism influence the alteration of the blood thyroid hormone and thyrotropin levels. Thyroid and hypophyseal thyrotropic functions depend to a certain degree on the exercise intensity and functional preparedness of the sportsmen.