Table 1

QT, RR intervals, and heart rate during the different stages of exercise

QT (ms) RR (ms) Heart rate (beats/min)
Rest308 (28), 240–360633 (120), 440–96095 (14.3), 69–120
Peak239 (20.6), 200–300328 (23), 280–390184 (13.1), 170–212
1 min241 (22), 200–340399 (51), 320–560145 (20.8), 93–184
2 min269 (24), 200–320508 (107), 360–900120 (22.4), 76–180
4 min291 (30), 240–400542 (90), 400–880110 (17.6), 72–154
6 min300 (26), 240–360572 (96), 400–800106 (15.8), 78–142

  • Values are mean (SD), range.