Fig. 2

Excretion rate (%dose/h) values of.¹³CO₂ over 150 min as shown in the [¹³C]-labeled acetic acid breath test at EX + 4 °C and EX + 60 °C trials. Data were analyzed using two-factor ANOVA. EX: 20 sets of moderate-intensity interval exercises, in which 1 set consisted of 120% maximum heart rate for 20 s and 25 W for 40 s; 4 °C: carbohydrate-protein-containing drink intake at 4 °C; 60 °C: carbohydrate-protein-containing drink intake at 60 °C. There was a significant main effect of time (p < 0.001). There were no main effect of trial (p = 0.463) and interaction (p = 0.352)