Figure 2. Variability in weight loss response to 12 weeks supervised exercise (King et al. 2007). BW – body weight; FM – fat mass. It is possible that a compensatory increase in food intake could also be due inappropriate food choices and a feeling that food self-reward is justified, or from misjudgments about the energy cost of physical activity (calories expended) relative to the rate of eating-induced intake (calories consumed). Empirical evidence demonstrates that when physical activity is combined with high-fat, energy dense foods, the beneficial effects of activity on energy balance can be reversed (King & Blundell, 1995; Tremblay et al, 1994). An increase in physical activity does not automatically protect against inappropriate food choice.