I am sure you have noticed this: you begin running, let’s say, and the first 10 to 15 minutes really seem difficult and you hate yourself for being so fat / unfit / out of shape, etc. Suddenly, like something has changed, like a fresh lease of life, the doubts disappear, the breathing evens out, the legs seem to move in an automatic rhythm and the effort level drops. If you were able to go deep within your body, you would notice that the ATP is now coming out of fat versus carbs, and since fat is an unlimited source you will feel that you can now go on forever. Technically, there’s a term for
...more
18
