Evaluation criteria of the hyperthyroid patients' adaptability to effort

The submaximal triangular-type test was used for studying the adaptive capacity, on an ergometric bicycle. It was performed continuously, starting from O W, with a load increment of 10 watts/min up to optimal maximum heart rate (fmo). The heart rate, arterial blood pressure, electrocardiogram, CO2 output and O2 consumption computed maximal O2 consumption (VO2 max, ml/kg/min) (Astrand) were predicted, also taking into consideration the subjective sensations linked to effort, measured on a modified Borg scale. The capacity to effort was expressed by the "adaptability coefficient" (AC) according to formula: AC = W' divided by 2 + (W' --f). 40 hyperthyroid patients, compared to a lot of normal thyroid subjects were examined, both at the beginning and after the treatment at certain intervals of time. A decrease of the effort capacity before the treatment and its increase after was noticed in hyperthyroid patients.