This study was performed to compare the changes in anthropometric measurements, muscle strength, flexibility, energy consumption and pulmonary function before the treatment of hyperthyroidism and in euthyroid status after antithyroid treatment in previously hyperthyroid patients. Eight (5 female, 3 male) hyperthyroid patients (mean age: 43.38±13.51 years) participated in the study. The anthropometric measurements, manual muscle test, hand grip strength test with a Jamar dynamometer, the test for 1 maximum repetition of the Quadriceps femoris muscle (1 max of QF) and flexibility tests were done both prior to the antithyroid treatment and after the patients returned to euthyroid status. Energy consumption was measured using the "physiological cost index", also pulmonary functions (VC, FVC, FE V1) were tested using a spirometer. When the results obtained before the treatment and in euthyroid status after antithyroid treatment were compared, increases in the muscle strengths in the neck, trunk, scapula (p<0.05), upper, lower extremities (p<0.001) and the flexibilities of Quadriceps femoris (QF) and trunk extension (p<0.001) were statistically significant in the euthyroid status. The increases in the hand grip strength and the 1 max of QF (p<0.001) were also significant. The body weight increased (p<0.05) but, there were no statistically significant differences in the other anthropometric measurements or pulmonary function. The energy consumption decreased in euthyroid status (p<0.01). The present study demonstrated that the medical treatment of hyperthyroid patients resulted in a mark ed increase in muscle strength and a decrease in energy consumption while there were no statistical significant differences in the anthropometric measurements, except body weight, before and after treatment.
Keywords: Hyperthyroidism, anthropometric measurement, muscle strength, flexibility, energy consumption, pulmonary function