Table 3.

Multiple linear regression models for estimating the contribution of SPA to increases in total energy expenditure between active and inactive periods of the 24-h cycle

Parameter	Estimate	t Value	P value
SPA	0.132 ± 0.027	4.871	0.00004
Body weight	0.018 ± 0.009	2.095	0.04537
Intercept	−0.699 ± 3.459	−0.202	0.84139

Values are means ± SE. SPA, spontaneous physical activity. This regression was based on simultaneous SPA and energy expenditure data collected for 32 male Sprague-Dawley rats with the use of indirect calorimetry.