The Impact of Fallow-Up Thyroid Hormone Alterations and Its Stimulant after Moderate and Intense Exercise in Male Athletes

A. R. Shahsavar¹* and M. J. Pourvaghar²

¹Department of physical education, ((Islamic Azad University, West Tehran Branch)), Tehran, I.R. Iran. ²Department of Physical Education, University of Kashan, Kashan, I.R. Iran.   Corresponding Author E-mail:shahsavar6@gmail.com

ABSTRACT: This research is carried out as a follow-up study of the alterations in Thyroid Stimulating Hormone (TSH), Triiodothyronine (T3) and Thyroxine (T4) hormones. In this study, aerobic activities as well as Bruce protocol have been used. To this end, 14 male students participated in a semi-experimental study. The students attended a stadium for 3 months, 2 sessions a week to do physical activity. In the first session, 5 ml blood sample was taken from the subjects in a fasting state. The subjects did warm up, stretch and different aerobic exercises for 3 months under the supervision of the researchers. Then they took the Bruce aerobic test in the sports test hall. After the end of the 3-month period and after the Bruce test, 24 and 48 hours after that, blood samples were taken from the subjects. Paired sample test was used in order to track changes in TSH, T3, and T4 concentration from one stage to another. Statistical analysis of data showed that 3 months of sub maximal aerobic sport activities made a significant change in TSH serum concentration of the subjects’ blood (P = 0.011). Also, exhausting sport activity of the Bruce test caused a significant change in TSH serum of the subjects’ blood (P = 0.003). When the subjects rested for 24 hours, TSH serum still remained significant (P = 0.005). However, 48 hours of rest caused TSH serum of the subjects return to its primary mode (P = 0.356). After 3 months of training and performing exhausting activities of the Bruce test, T3 serum concentration was significant (P = 0.013), (P = 0.028). The results showed that 24 hours after the test T3 serum concentration is significant (P = 0.013). 48 hours of rest caused T3 serum of the subjects’ blood to become non-significant (P = 0.621). Three months of aerobic exercise does not bring about a significant change in T4 serum concentration of the blood (P = 0.58). However, the exhausting Bruce test brought about extensive and significant changes in T4 serum of the blood even after 24 hours (P = 0.0001). In short, it can be said that aerobic and sub maximal physical exercise and also exhausting aerobic activities bring about significant changes in the concentrations of TSH, T3, and T4. These changes are more visible in exhausting aerobic activities and can even continue for two more days. Therefore, the changes occurred affect the metabolism of threefold foodstuff and also the performance of athletes.

KEYWORDS: Thyroid Stimulating Hormone; Triiodothyronine; Thyroxine; Bruce test

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