Originally Posted by titus_teen
Does it matter if I do cardio on an empty stomach or not? I have heard you need to eat before hand but then a pal told me only do not eat if you are trying to lose weight.
If you do anaerobic cardio on an empty stomach, you're just going to burn off muscle.
Anaerobic glycosis means you can only burn glucose/glycogen to create ATP. This means if your body doesn't have readily available glucose, it'll just break down muscle tissue.
I'd make sure to get a meal in before running.