June 13th the Health and Fitness Section of the Globe & Mail had an interesting article on the "Forks v.s. Feet" debate, both diet AND exercise matter. Seems earlier in the year a couple of researchers faced off over the burger-and-beer scarfing exercise junkies and gymphobic calorie counters to discover; it's increasingly clear that the two factors can't be separated. They've been studying over 100,000 runners to discover that, our bodies, when they're working properly, have several mechanisms that try to keep weight stable. For example, we tend to burn more fat rather than carbohydrate after a high-fat meal. But obese subjects tend to exhibit "metabolic inflexibility" - instead of adjusting to burn more fat, their bodies simply store the extra fat after a high fat meal. At high levels of exercise, numerous studies have found that appetite tends to closely match energy requirements. But this relationship breaks down at lower levels of exercise. If you feed someone a 200 calorie snack early in the day, for example, heavy exercisers will unconsciously adjust their appetite to eat 200 fewer calories over the rest of the day. Sedentary subjects, on the other hand, will eat just as much as they normally would. Results suggest that, in the great "Forks v.s. Feet" debate, trying to fix one without considering the other simply doesn't make sense.
Rise Up, Be Healthy!