Reproductive hormonal profiles of endurance-trained and untrained males
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Deutscher übersetzter Titel: | Profile der Fortpflanzungshormone bei ausdauertrainierten und untrainierten Maennern |
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Autor: | Hackney, Anthony Carl; Sinning, W.E.; Bruot, B.C. |
Erschienen in: | Medicine and science in sports and exercise |
Veröffentlicht: | 20 (1988), 1, S. 60-65, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0195-9131, 1530-0315 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU198806034582 |
Quelle: | BISp |
TY - JOUR AU - Hackney, Anthony Carl A2 - Hackney, Anthony Carl A2 - Sinning, W.E. A2 - Bruot, B.C. DB - BISp DP - BISp KW - Ausdauersport KW - Ausdauertraining KW - Endokrinium KW - Fertilität KW - Hormonhaushalt KW - Keimdrüse KW - LH KW - Mann KW - Sportmedizin KW - Testosteron KW - Trainingswirkung LA - eng TI - Reproductive hormonal profiles of endurance-trained and untrained males TT - Profile der Fortpflanzungshormone bei ausdauertrainierten und untrainierten Maennern PY - 1988 N2 - This study compares the resting reproductive hormonal profiles of untrained (N=11) and endurance-trained (N=11) males. Testosterone, free testosterone, estradiol, luteinizing hormone (LH), prolactin, and cortisol were measured by radioimmunoassay in resting blood samples (8 h fast) colleted every 60 min for 4 h. The endurance-trained group had been active for 12.4 +/- 6.7 yr, 6.6 +/- 0.2 d/wk, 68.5 +/- 4.4 min/d, while the untrained group was sedentary. Neither group had histories of hypothalamic-pituitary-testicular disorders. The overall 4 h mean testosterone and free testosterone levels were significantly lower in the trained group. The LH of the endurance-trained group was higher; however, LH pulse frequency and amplitude did not differ between groups. An enhanced estradiol feedback to the hypothalamus-pituitary could not account for the elevated LH, as estradiol levels were similar in the groups. Prolactin and cortisol levels were normal and did not differ between groups. The results suggested normal hypothalamic-pituitary function existed in the trained subjects, and prolactin and cortisol were not causative factors in the lowered resting testosterone and free testosterone levels. The findings indicate that chronic endurance training lowers testosterone and free testosterone in males possibly by impairing testicular function. Verf.-Referat SP - S. 60-65 SN - 0195-9131 JO - Medicine and science in sports and exercise IS - 1 VL - 20 M3 - Gedruckte Ressource ID - PU198806034582 ER -