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Originally Posted by aberkok
Hey Nikki, I still haven't researched why this is important, but I have several good sources telling me you should do your cardio work after resistance training. Something to do with the types of energy you burn. I'm sure someone better informed could tell us why.
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I have a general answer to this. It might help your search for some articles about it online. First of all, weight training requires a lot of energy. Much of this energy will come from glycogen stores in your muscles, the prime fuel for this type of work. However, once you deplete these stores, your body will immediately begin to take available blood glucose to replace it. This means that your glucose stores will also be depleted over time.
Doing cardio after an intense session of weights will increase the chances of your burning fat during cardio, as opposed to blood glucose first, then fat. When you do cardio, the prime fuel is blood glucose, not glycogen. Depending on the intensity, however, it might instead be oxygen. But that's another topic.
I hope this helps as a general explanation.