Table 2.

Substrate utilization calculated during the 60- to 90-min period of exercise in heat and cool trials

Heat TrialCool TrialP Value
CHO total3.18 ± 0.152.85 ± 0.100.087
Fat total0.36 ± 0.050.48 ± 0.050.197
Exogenous glucose0.76 ± 0.06* 0.84 ± 0.050.017
Muscle glycogen2.07 ± 0.16* 1.66 ± 0.090.042
Plasma glucose1.12 ± 0.061.19 ± 0.040.082
Liver-derived glucose0.36 ± 0.040.36 ± 0.040.783
  • Values are presented as means ± SE given in g/min for 9 subjects. CHO, carbohydrate.

  • * Significantly different from cool trial, P < 0.05.