Best Answer Tusitala Tom says
If we want to maintain an optimum body-weight for life we need to be aware of one obvious truth: the energy we take it should equate to the energy we expend. If you are running a Marathon every second day you will need to take in plenty of energy. I know one lady who used to run such long distantances who simply used to eat lots of bread; several loaves in fact, and never put on an ounce of fat. But how many of us run Marathons?
It is also true that whilst our bodies are growing, i,e. up until our early to mid twenties our intake of calories can and should exceed the rate at which we burn them up. We are, after all, still adding bone, flesh and tissue. But once we ARE grown up, we need to adhere to that rule of equalization: calories in to match calories burned up in excercise.
The problem is we all like to eat. Fine. But do it for taste and let the taste linger. You don't need to walk around with a can of Coke in one hand and a Big Mac in the other for a goodly part of every day. And as for those energy drinks...don't even bother.