This study investigated the combined impact of the thermic effect of food and the thermic effect of exercise while varying meal size prior to exercise and also varying the intensity of exercise. The symbiotic relationship between the TEF and TEE was examined during the study. This means TEF and TEE influenced each other resulting in and increased effect. It was hypothesized that the symbiotic relationship would be present and that a large meal would have a greater effect on metabolic rate when compared to small meal.