Q: hey man, can i drink whey protein while i am working out, and when i am lifting weights should i start from small to big or from big to small..

A: You could drink protein during your workout session and some people do that, but I would recommend saving protein for before and immediately after the workout -- your body needs to work relatively hard to digest protein which diverts bloodflow and energy from the workout and protein is not a good source of energy anyway which is what you are really looking for. If you need like you are running out of energy too quickly during the workout, first make sure that your overall diet is adequate -- read my Nutrition article if you need a starting point.

If that doesn't help then you could consider drinking some sugary drink (such as Gatorade) during your workout -- simple sugars get digested and absorbed into your bloodstream much faster than protein and provide a quick energy source, especially if your workouts last over an hour. Personally I am not a big fan of this approach for most people because simple sugars decrease your insulin sensitivity in the long run which leads to easier fat gains and potentially even diabetes (not to mention teeth rot). It also makes some people nauseous and lessens the workout effectiveness. But it may be the right approach for some people, such as athletes, who have to have long workouts (or actual competitions) and need energy to carry them through.