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pintoca said:roofus, there are a couple of things in that post I would like to disagree with...
there are 3 main energy systems: ATP, Anaerobic (carbs) and Aerobic (fat oxidation).
Depending on what you are doing, you will use one or a combination of the three systems, since they are all different in their sources and duration, for example, you cannot run a marathon on ATP (it only lasts a few seconds of explosive energy) and you cannot deadlift 500lbs on the Aerobic system (which is specially designed for providing long-lasting, not too explosive energy).
I agree, though, on the notion of cardio after lifting, for 2 reasons:
1. you will not be tired for your lifts from all that cardio
2. you will be mostly carb-depleted, which should mean you will run your cardio less on carbs (burning sugar) and more on anything else (I dare not to say 100% fat, since it depends on many things).
The body is a VERY complicated thing and even though we all follow the same basic rules, we are all different engines.
as a final point, when people say the body needs fat to burn fat, what they mean is that the body needs EFAs to HELP burn more fat. The complete methabolical path of the reactions that lead to this is described in Udo Erasmu's "Fats that kill, Fats that Heal" book, which is of course, a very recommendable one to read, specially in this fat-phobia era.
just my 2 cents