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1 Central European Journal of Sport Sciences and Medicine

1 2021

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Normal Levels of TSH Affect the Metabolic Profile Differently in Physically Active Males and Females

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Malara M. , Kęska A. , Tkaczyk J. , Lutosławska G.

nr 3

41-48

Our study was aimed at the evaluation of relationships between thyroid stimulating hormone (TSH) within the normal range and metabolic risk factors (glucose, insulin, HOMA-IR and lipoprotein profile) in physically active male and female students. In 219 students circulating TSH, glucose, insulin and lipoproteins were measured in blood under fasting conditions. Insulin resistance was expressed as HOMA-IR (homeostasis model assessment for insulin resistance). For further procedures 99 males and 97 regularly menstruating females with TSH 0.4–4.0 μIU/ml were accepted. In male students no correlations between circulating TSH, anthropometric and biochemical variables were noted. In females TSH within the normal range was slightly but significantly correlated with the triglyceride (TG) level (p < 0.03). However, step-wise multiple regression analysis revealed that the effect of TSH was small (p < 0.046) in relation to that found for HOMA-IR ( p < 0.0009). No relationships between biochemical variables and normal levels of TSH were noted in male students. However, surprisingly normal range TSH in males was slightly but significantly correlated with the percentage of body fat and this issue needs further studies concerning measurements of different fat depots. The above data suggests that in active females TG synthesis and export from the liver is more sensitive to TSH action than in active male counterparts.