Weight and Energy Expenditure

Metabolism the process by which your body converts what you eat and drink into energy. Normally, the healthy people would maintain a balance state between the energy intake and energy expenditure.

Things that can affect the energy intake are whether you feel hungry, how near you are to food, how calorific your food is, or the composition of your diet.

Things that can affect the right hand side of the balance are things that can burn calories. I know you are thinking exercise. However, there are other components you might have missed, namely resting energy expenditure, involuntary activities (i.e. non-exercise related activities, such as fidgeting and hand gestures), diet-induced thermogenesis, and cold-induced thermogenesis.

And when you digest food, you are actually burning calories by emitting a small amount of heat. So is when you are put in a cold environment, your body will burn energy in order to emit heat to keep your warm. All such activities or processes will help to increase the energy expenditure.

                                    Energy Balance


Losing weight then becomes a battle between energy intake and energy expenditure. The strategy of winning this battle seems simple, eat less and exercise more. But in practice, it’s far more complicated. For example, how much less should one eat in order to reduce weight? What’s the minimum amount of food he needs to survive? Is there any other means to burn calories more efficiently? Research questions like these can be studied using the metabolic chamber.