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Serum thyroid hormones, thyrotropin and thyroxine binding globulin in elite athletes during very intense strength training of one week. 1991

A Pakarinen, and K Häkkinen, and M Alen
Department of Clinical Chemistry, University of Oulu, Finland.

The effects of a one-week very intense strength training period on maximal strength and pituitary-thyroid function were investigated in eight elite male weight lifters. No statistically significant changes occurred in the maximal isometric leg extension force of the test subjects. Decreased serum concentrations of thyrotropin (TSH), thyroxine (T4) and triiodothyronine (T3) were found during the training period, but no statistically significant changes occurred in the levels of free thyroxine (fT4), reverse T3 (rT3) and thyroxine binding globulin (TBG). The results suggest that the training stress affects at the hypophyseal and/or hypothalamic level decreasing the secretion of TSH, which leads to slightly decreased function of the thyroid gland.

UI MeSH Term Description Entries
D008297 Male Males
D010806 Physical Education and Training Instructional programs in the care and development of the body, often in schools. The concept does not include prescribed exercises, which is EXERCISE THERAPY. Education, Physical,Physical Education,Physical Education, Training
D010807 Physical Endurance The time span between the beginning of physical activity by an individual and the termination because of exhaustion. Endurance, Physical,Physical Stamina,Stamina, Physical
D005387 Finland A country in northern Europe, bordering the Baltic Sea, Gulf of Bothnia, and Gulf of Finland, between Sweden and Russia. The capital is Helsinki. Aland Islands,Åland Islands
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D013963 Thyroid Hormones Natural hormones secreted by the THYROID GLAND, such as THYROXINE, and their synthetic analogs. Thyroid Hormone,Hormone, Thyroid,Hormones, Thyroid
D013972 Thyrotropin A glycoprotein hormone secreted by the adenohypophysis (PITUITARY GLAND, ANTERIOR). Thyrotropin stimulates THYROID GLAND by increasing the iodide transport, synthesis and release of thyroid hormones (THYROXINE and TRIIODOTHYRONINE). Thyrotropin consists of two noncovalently linked subunits, alpha and beta. Within a species, the alpha subunit is common in the pituitary glycoprotein hormones (TSH; LUTEINIZING HORMONE and FSH), but the beta subunit is unique and confers its biological specificity. Thyroid-Stimulating Hormone,TSH (Thyroid Stimulating Hormone),Thyreotropin,Thyrotrophin,Hormone, Thyroid-Stimulating,Thyroid Stimulating Hormone
D013975 Thyroxine-Binding Proteins Blood proteins that bind to THYROID HORMONES such as THYROXINE and transport them throughout the circulatory system. Thyroxine Transport Protein,Thyroxine-Binding Protein,Thyroxine Binding Protein,Thyroxine Binding Proteins
D014891 Weight Lifting A sport in which weights are lifted competitively or as an exercise. Lifting, Weight,Liftings, Weight,Weight Liftings

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