There's a widespread belief that exercising on an empty stomach makes the body burn more fat. However, the human body isn't a robot that responds to such a simple algorithm. A lot of variables can come into play: the type of physical exercise performed (cardio and weight training are not the same) as well as the the intensity, or even the state of our body's reserves depending on what we had for dinner the night before . We can say that it's true, though, that exercising on an empty stomach can help with fat loss. Why? When we first wake up in the morning, our reserves of glycogen - the way our body stores glucose, its main source of energy - are lower. And when glycogen is below normal functioning limits, our body will opt to use its body fat reserves to fuel us instead.

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