Most common determinant of energy expenditure in a resting state is:
Energy expended in the resting state depends primarily on the lean body mass and the metabolic cost for processing ingested nutrients. Ref: New Developments in Obesity Research By Lawrence F. Ditmier, Page 131; Handbook of Obesity: Etiology and Pathophysiology By George A. Bray, Page 705
Lean Body Mass
Adipose tissue
Resting Hea Rate
Exercise