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British Journal of Sports Medicine logoLink to British Journal of Sports Medicine
. 1983 Sep;17(3):180–183. doi: 10.1136/bjsm.17.3.180

Immediate effects of heavy exercise on the circulating thyroid hormones.

A R Siddiqui, R B Hinnefeld, T Dillon, W E Judson
PMCID: PMC1859160  PMID: 6652401

Abstract

Sera from 20 patients with suspected or known coronary artery disease were measured for thyroxine (T4), tri-iodothyronine (T3), tri-iodothyronine uptake ratio (T3UR), thyroid stimulating hormone (TSH), and reverse tri-iodothyronine (rT3), before and after maximal or near-maximal exercise. On the average the patients achieved 92% (rang 68-108) of the predicted maximum heart rate. There were no statistically significant differences between the pre- and the post-exercise serum levels of thyroid hormones. When five patients who achieved less than 90% of the predicted maximum heart rate were excluded, the results remained unchanged. It appears that the circulating thyroid hormones are not acutely affected after maximal or near-maximal exercise; however, the patient population was highly select.

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Selected References

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