It's a bit more complex than the commonly spouted calories in/calories out argument. There is still a lot that we don't know with regards to metabolism. I am u

It's a bit more complex than the commonly spouted calories in/calories out argument. There is still a lot that we don't know with regards to metabolism. I am usually a higher mileage runner during spring to fall months (70-90km / week) and although I scale my eating to offset my calories burned, I will still lose weight. I will not provide a citation but it's quite widely known that metabolism increases as the body normalizes into a training period or regimen. And increasing with diminutive returns as the training increases. Recovery also burns more calories even while sedentary (as you should be when recovering).