Figure 1: Model of human energy expenditure compartments (adapted from 23). Exercise related activity is complementary to exercise related activity thermogenesis (EAT), while spontaneous physical activity relates to nonexercise activity thermogenesis (NEAT; for further explanations see text). Note that parts of spontaneous physical activity are beyond voluntary control, i.e. “fidgeting”. Arrows symbolize the multiple and individually varying impacts of individual factors, genetic background and environment.