hmm
If you are that worried of muscle loss, go buy some amino acid tablets, and take those 30-0 mins before your cardio, that way your body can use the amino's you digested instead of any muscle. I think the mourning cardio is a good idea, but if you do cardio 2-3 hours after a meal , I think it is just as effective. Hopefully that meal was very low carb and you should be good.