Influence of marathon running on thyroid hormones
Deutscher übersetzter Titel: | Einfluss des Marathonlaufens auf die Schilddruesenhormone |
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Autor: | Sander, M.; Roecker, L. |
Erschienen in: | International journal of sports medicine |
Veröffentlicht: | 9 (1988), 2, S. 123-126, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 0172-4622, 1439-3964 |
DOI: | 10.1055/s-2007-1024992 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU198806034583 |
Quelle: | BISp |
Abstract
Thyroid hormones were studied in 16 well-trained male amateur runners (mean age 31,8 years) before, immediately after, and 60 min and 22 h after marathon running. Free thyroxine (fT4), appraised by the free thyroxine index (fT4-l), was significantly increased immediately after and 1 h after the race compared with control values. Thyroid-stimulating hormone (TSH) was significantly increased immediately after the race, returned to the control value 1 h later, and was markedly decreased 22 h after the race. Free triiodothyronine (fT3) and free reverse triiodo-thyronine (frT3), appraised by the ratios triiodothyronine/-thyroxine binding globulin and reverse triiodothyronine/thyroxine binding globulin, respectively, showed contrary results. frT3 increased significantly after exercise, whereas fT3 decreased insignificantly. The peripheral conversion of thyroxine was additionally estimated by the ratios rT3/T3 and rT3/T. Both ratios were increased significantly after the run and remained elevated 22 h after the race. It is concluded that an increased TSH-regulated T4 secretion occurs during prolonged exercise as well as a change of the peripheral conversion process in favor of the hormonal inactive rT3. The latter condition still remained 22 h after the race. Verf.-Referat