Fig. 1

HR before, during, and after the TSST-G among volunteers of high and low aerobic fitness. Values are presented as mean ± SEM for each 2-min time interval. The first quartile represents subjects of high aerobic fitness; the fourth quartile represents subjects of low aerobic fitness. Each of the 15 time-segments in the figure represents data from all 219 subjects. HR heart rate, TSST-G Trier Social Stress Test for Groups