HORMONAL CHANGES IN SERUM IN YOUNG MEN DURING PROLONGED PHYSICAL STRAIN
HORMONAL CHANGES IN SERUM IN YOUNG MEN DURING PROLONGED PHYSICAL STRAIN
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DOI:
10.1007/bf00421452
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发表时间:
1978-01-01
影响因子:
3
通讯作者:
FONNUM, F
中科院分区:
文献类型:
--
作者:
AAKVAAG, A;SAND, T;FONNUM, F
The endocrine response to severe physical strain including lack of sleep was investigated in army personnel during a combat course of 5 days'' duration. The thyroxine (T4) concentration in serum increased during the first 24 h, and then declined at a rate corresponding to a half-life of 7.6 days and on day 6 reached the lowest level, 55 ng/ml. Triiodothyronine (T3) displayed a similar pattern, although an increase during the first 24 h could not be demonstrated. Within 48 h after the course T4 had returned to normal, whereas the serum level of T3 was significantly below the level before the course (P < 0.05). The serum level of TSH [thyrotropin] was suppressed during the course. The serum level of prolactin was significantly suppressed and growth hormone was markedly elevated during the course with a significant negative correlation (r [correlation coefficient] = -0.6) between the two. In agreement with a previous report, there was a rapid and sustained suppression of the serum level of testosterone to a mean level of 1.1 ng/ml on day 5. Short periods of sleep (3-6 h) were effective in reversing the described changes, especially for growth hormone, prolactin and testosterone.