Serum concentrations of thyrotropin, thyroxine, triiodothyronine and thyroxine binding globulin in female endurance runners and joggers
Abstract. The effects of endurance training and season on the function of the anterior pituitary-thyroid axis were studied in 18 female runners and their 12 controls, and in 13 joggers and their 11 controls in Northern Finland, with a large seasonal difference in environmental factors. The serum con...
Published in: | Acta Endocrinologica |
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Oxford University Press (OUP)
1987
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Online Access: | http://dx.doi.org/10.1530/acta.0.1140041 https://eje.bioscientifica.com/view/journals/eje/114/1/acta_114_1_006.xml |
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croxfordunivpr:10.1530/acta.0.1140041 2023-05-15T17:42:48+02:00 Serum concentrations of thyrotropin, thyroxine, triiodothyronine and thyroxine binding globulin in female endurance runners and joggers Hohtari, H. Pakarinen, A. Kauppila, A. 1987 http://dx.doi.org/10.1530/acta.0.1140041 https://eje.bioscientifica.com/view/journals/eje/114/1/acta_114_1_006.xml unknown Oxford University Press (OUP) Acta Endocrinologica volume 114, issue 1, page 41-46 ISSN 0804-4643 1479-683X Endocrinology General Medicine Endocrinology, Diabetes and Metabolism journal-article 1987 croxfordunivpr https://doi.org/10.1530/acta.0.1140041 2023-02-17T11:30:49Z Abstract. The effects of endurance training and season on the function of the anterior pituitary-thyroid axis were studied in 18 female runners and their 12 controls, and in 13 joggers and their 11 controls in Northern Finland, with a large seasonal difference in environmental factors. The serum concentrations of thyrotropin (TSH), thyroxine (T 4 ), free thyroxine (fT 4 ), triiodothyronine (T 3 ), thyroxine binding globulin (TBG) and oestradiol (E 2 ) were measured during one menstrual cycle in the light training season (autumn) and in the hard training season (spring). The responses of TSH to intravenous TRH stimulation were also measured in the luteal phase of the cycle during the hard training season. Endurance running did not affect the basal or TRH-stimulated serum TSH concentrations, while those of T 4 and fT 4 in runners were lowered in both seasons and that of T 3 in the light training season in relation to control subjects. The serum concentrations of TBG were also significantly lower in runners than their controls in the luteal phase in both seasons. The effect of jogging on thyroid hormones was less pronounced. Serum concentrations of TSH, T 4 , fT 4 , T 3 and TBG were generally slightly higher in spring than in autumn. Strenuous endurance training seems to have minor changes on the function of the thyroid gland. Depressed T 4 levels in runners may rather be due to lowered TBG levels than due to direct effect of training. In spring the function of anterior pituitary-thyroid axis is more active than in autumn. Article in Journal/Newspaper Northern Finland Oxford University Press (via Crossref) Acta Endocrinologica 114 1 41 46 |
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Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
unknown |
topic |
Endocrinology General Medicine Endocrinology, Diabetes and Metabolism |
spellingShingle |
Endocrinology General Medicine Endocrinology, Diabetes and Metabolism Hohtari, H. Pakarinen, A. Kauppila, A. Serum concentrations of thyrotropin, thyroxine, triiodothyronine and thyroxine binding globulin in female endurance runners and joggers |
topic_facet |
Endocrinology General Medicine Endocrinology, Diabetes and Metabolism |
description |
Abstract. The effects of endurance training and season on the function of the anterior pituitary-thyroid axis were studied in 18 female runners and their 12 controls, and in 13 joggers and their 11 controls in Northern Finland, with a large seasonal difference in environmental factors. The serum concentrations of thyrotropin (TSH), thyroxine (T 4 ), free thyroxine (fT 4 ), triiodothyronine (T 3 ), thyroxine binding globulin (TBG) and oestradiol (E 2 ) were measured during one menstrual cycle in the light training season (autumn) and in the hard training season (spring). The responses of TSH to intravenous TRH stimulation were also measured in the luteal phase of the cycle during the hard training season. Endurance running did not affect the basal or TRH-stimulated serum TSH concentrations, while those of T 4 and fT 4 in runners were lowered in both seasons and that of T 3 in the light training season in relation to control subjects. The serum concentrations of TBG were also significantly lower in runners than their controls in the luteal phase in both seasons. The effect of jogging on thyroid hormones was less pronounced. Serum concentrations of TSH, T 4 , fT 4 , T 3 and TBG were generally slightly higher in spring than in autumn. Strenuous endurance training seems to have minor changes on the function of the thyroid gland. Depressed T 4 levels in runners may rather be due to lowered TBG levels than due to direct effect of training. In spring the function of anterior pituitary-thyroid axis is more active than in autumn. |
format |
Article in Journal/Newspaper |
author |
Hohtari, H. Pakarinen, A. Kauppila, A. |
author_facet |
Hohtari, H. Pakarinen, A. Kauppila, A. |
author_sort |
Hohtari, H. |
title |
Serum concentrations of thyrotropin, thyroxine, triiodothyronine and thyroxine binding globulin in female endurance runners and joggers |
title_short |
Serum concentrations of thyrotropin, thyroxine, triiodothyronine and thyroxine binding globulin in female endurance runners and joggers |
title_full |
Serum concentrations of thyrotropin, thyroxine, triiodothyronine and thyroxine binding globulin in female endurance runners and joggers |
title_fullStr |
Serum concentrations of thyrotropin, thyroxine, triiodothyronine and thyroxine binding globulin in female endurance runners and joggers |
title_full_unstemmed |
Serum concentrations of thyrotropin, thyroxine, triiodothyronine and thyroxine binding globulin in female endurance runners and joggers |
title_sort |
serum concentrations of thyrotropin, thyroxine, triiodothyronine and thyroxine binding globulin in female endurance runners and joggers |
publisher |
Oxford University Press (OUP) |
publishDate |
1987 |
url |
http://dx.doi.org/10.1530/acta.0.1140041 https://eje.bioscientifica.com/view/journals/eje/114/1/acta_114_1_006.xml |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_source |
Acta Endocrinologica volume 114, issue 1, page 41-46 ISSN 0804-4643 1479-683X |
op_doi |
https://doi.org/10.1530/acta.0.1140041 |
container_title |
Acta Endocrinologica |
container_volume |
114 |
container_issue |
1 |
container_start_page |
41 |
op_container_end_page |
46 |
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1766144724952940544 |