The problem with that Josiah81, is then you defeat the whole purpose of doing cardio right after weights which is glycogen depletion. With sugar back in your body, your body doesn't have to burn fat for fuel stores and your cardio session just ends up depleting your glycogen stores once again. If I do cardio after weights, and my weight training never exceeds an hour for maximum intensity, I drink BCAA's while I do cardio to prevent muscle loss and save the carb/protein meal or shake for after the cardio session. this has worked very well for me in the past.

Thanx for the reply! That is my concern – does a protein shake restore glycogen or would I have to consume carbs to do so?? The thing is that I love doing cardio after lifting weights (weight training 1-2 h) but sometimes I just do not have enough energy to do so – so I have a protein shake – but then again I do not know if my cardio is as effective as I want it to be...