You guys and your types of cardio....man, this is a never ending post. Why does everyone do the weight training so easily, but have such difficutlty grasping the cardio concept?
Its because everyone thinks once they step on a piece of cardio equipment, they are automatically burning fat, and there has to be some piece of equipment that someone found that has the more magic fat burning ability.
Cardio is all about adding to a caloric deficit. It is an extension of your diet and not much more. Bottom line, end of story.
Just do it, anything that helps create a caloric deficit. If one apparatus burns 20 more calories in 30 minutes than another, is this really enough to fret over? Think about it, eat one ice cream bar, or one candy bar, and you added more calories than you ever burnt in any cardio session for the most part.
Caloric deficit, this is what does the job. If you burnt so much fat doing cardio and it wasn't anything to do with diet, how do you explain the "cardio bunnies" we all see in the gym, day after day running for hours on end, but every time you see them they look exactly the same?
It is because what they are doing does not offset the diet. You use cardio to add to your diet, thus the line for cardio...an extension of your diet.
And I would go farther and say it doesn't matter when you do it, morning, noon or even night. You will do the same thing, add to your calorie deficit.
My last contest for instance, guess what, I did all my cardio exclusively at night, midnight after I got off work. Never in the morning. And guess what, I ended up losing fat just as well.
This was a result of night time cardio.