Table 3.

Contribution of substrates to total energy expenditure

Substrate	Rest	Exercise	2 h recovery
Fat	0.09 ± 0.01 (66%)	0.61 ± 0.06 (43%)*	0.12 ± 0.01 (75%)*
Free fatty acids	0.07 ± 0.008 (48%)	0.40 ± 0.05 (28%)*	—
Other fat sources	0.02 ± 0.004 (17%)	0.22 ± 0.03 (15%)*	—
Carbohydrate	0.12 ± 0.02 (34%)	2.05 ± 0.15 (57%)*	0.10 ± 0.02 (25%)*
Plasma glucose	—	0.43 ± 0.03 (12%)	—
Muscle glycogen	—	1.61 ± 0.16(45%)	—
Energy expenditure	5.76 ± 0.22	58.05 ± 0.61*	6.39 ± 0.27*

Energy expenditure (kJ min⁻¹) and substrate use at rest, during exercise and during post-exercise recovery; expressed as average oxidation rate (g min⁻¹) as well as relative contribution to total energy expenditure (%). Values are means ± s.e.m. (n = 8)

^*significantly different from pre-exercise resting values (P < 0.05).