Table 1.

Animal characteristics and hepatic mitochondrial enzyme activities.

Variable	SED	VWR	VWR-OF	TM-END	TM-IST
Body Weight (g)	512.3 ± 19.8 a	491.2 ± 18.9 a	431.8 ± 14.5 b	430.4 ± 8.9 b	423.1 ± 10.0 b
Fat Pad Mass (g)	23.4 ± 2.1 a	15.3 ± 2.3 b	8.81 ± 1.6 c	10.3 ± 0.7 b,c	10.5 ± 1.0 b,c
Food Consumption (g)/week	189.4 ± 4.4 a	214.8 ± 4.8 b	168.1 ± 6.7 c	152.3 ± 6.3 d	147.3 ± 3.3 d
Food Consumption/Body weight (g per wk/g body wt)	0.39 ± 0.01 a	0.46 ± 0.01 b	0.38 ± 0.02 a,c	0.35 ± 0.02 c	0.34 ± 0.01 c
Feeding Efficiency	0.14 ± 0.02 a	0.12 ± 0.01 a	0.08 ± 0.03 a,b	0.03 ± 0.03 b	0.04 ± 0.01 b
β-HAD, Relative to SED (%) (Whole Homogenate)	100.0 ± 6.3	86.3 ± 5.2	89.8 ± 7.8	96.7 ± 7.6	97.1 ± 6.9
β-HAD, Relative to SED (%) (Isolated Mitochondria)	100.0 ± 4.7	99.9 ± 5.6	101.6 ± 7.3	101.6 ± 7.3	95.4 ± 4.8
Citrate synthase, nmol·min-1·μg-1 (Whole Homogenate)	47.3 ± 0.8 a	50.7 ± 1.1 b	49.8 ± 1.6 a,b	46.6 ± 0.6 a	46.7 ± 1.1 a
Citrate synthase, nmol·min-1·μg-1 (Isolated Mitochondria)	77.0 ± 2.5	81.3 ± 2.1	84.2 ± 3.5	81.9 ± 8.0	79.7 ± 2.7

Values are means ± SE; n= 8-10 rats per group. SED, sedentary; VWR, voluntary wheel running; VWR-OF, voluntary wheel running overnight fasted; TM-END, treadmill endurance; TM-IST, treadmill interval sprint training. Fat pad mass was determined through the summation of omental, epididymal, and retroperitoneal fat pads. Values with different letters indicate significant differences (P≤0.05).