Table 3.

Energy expenditure and respiratory exchange ratio during a 24-h period on a sedentary day and a day beginning with a single session of sprint interval training (SIT).

Time of day	Energy expenditure (kJ/min)		Respiratory exchange ratio
	Sedentary	SIT	Sedentary	SIT
08:00–11:59	7.05 ± 0.22	10.26 ± 0.86*	0.81 ± 0.01	0.91 ± 0.01*
12:00–15:59	7.25 ± 0.20	6.9 ± 0.43	0.84 ± 0.01	0.86 ± 0.01
16:00–19:59	6.9 ± 0.19	6.60 ± 0.35	0.86 ± 0.01	0.85 ± 0.01
20:00–23.59	6.55 ± 0.19	6.11 ± 0.27	0.86 ± 0.01	0.84 ± 0.01
00:00–03.59	4.82 ± 0.16	4.43 ± 0.40	0.85 ± 0.01	0.84 ± 0.01
04:00–07:00	5.32 ± 0.23	5.01 ± 0.41	0.84 ± 0.01	0.84 ± 0.01

Data are mean ± SE. 1 kcal = 4.1868 kJ.

^*Denotes difference between sedentary and SIT for corresponding time period (P < 0.001). All other comparisons are P > 0.08.