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Table 2 Comparison of test time and maximal values of physiological data by condition

From: Myocardial functional responses do not contribute to maximal exercise performance in the heat

Variable Temperate Heat stress Difference
Test time (min) 16.3 (2.0) 15.9 (2.0)a 0.4 (0.4)
Peak power (W) 259 (30) 253 (30)a 5 (7)
Maximal heart rate (bpm) (polar) 187 (8) 187 (6) −1 (9)
End exercise core temperature (°C) 37.7 (0.4) 37.7 (0.4) 0.0 (0.4)
Rating of perceived exertion 9.3 (0.7) 9.5 (0.5) −0.2 (0.7)
Thermal sensation 6.1 (0.8) 7.2 (0.7)a −1.1 (0.8)
Oxygen uptake (L min−1) 4.07 (0.59) 3.93 (0.46) 0.13 (0.30)
Oxygen uptake (mL kg−1 min−1) 50.2 (8.7) 48.6 (8.5) 1.6 (3.6)
Respiratory exchange ratio 1.13 (0.05) 1.13 (0.06) 0.00 (0.07)
Arterial-venous oxygen difference (mL O2 L−1) 196 (40) 200 (43) −4 (42)
  1. Values are mean (SD).
  2. n = 12 for all variables except for core temperature, where n = 11; difference calculated as temperate − heat stress.
  3. a p < 0.05 between conditions.