Core temperature at rest (27°C) and arm sweat rate (SR) during 40 min of semirecumbent cycle exercise in the heat (35°C). Women with (PCOS) and without (Control) PCOS were studied while taking GnRH antagonist alone, while taking GnRH antagonist with estradiol (E2), and while taking GnRH antagonist with estradiol + testosterone (E2 + T). Data are expressed as mean ± SEM. *Different from control, †different from GnRH within the group, §different from E2 + ± within the group, P < 0.05.