Q: I read on a website( http://www.buildingbodies.ca/Cardio/early-morning-cardio.shtml)that the levels of muscle and liver glycogen are low early in the morning before one eats.So if one exercises before breakfast the body will burn fat more easily. What do you think?

A: I agree that your glycogen levels are low in the mornings and that's exactly why I do NOT recommend doing cardio on the empty stomach. I give my reasoning in http://www.mikesfitness.com/content/trainer-advises-cardio-empty-stomach

The basic problem with the cardio-on-empty-stomach-will-burn-fat argument is the same as with starving-will-burn-fat one: just because your body needs energy doesn't mean it'll turn to only the fat reserves for that energy! Instead it'll burn both fat and muscle which is NOT what you want when trying to lose fat. Every little bit of muscle you lose will slow your metabolism that much more, will prevent FUTURE fat loss that much more, and make you vulnerable to fat coming back that much more.

Losing fat is not hard if you know what you're doing and take your time. It's hanging on to the muscle at the same time that's hard but it's hanging on to the muscle that will allow your fat loss to be sustainable and lasting.