Q: Hi Mike, I would like to know what would happen to me if I did weight training 4 times a week, and all i eat and drink is water and whey protein shake.

A: That's a very very bad idea. Healthwise you'd probably start developing all sorts of problems within days. Whey protein shake is far from being a complete meal by itself and your body would not be getting the carbs, the fat, and all the numerous vitamins and minerals it needs to survive. And if you think this approach will help you lose a lot of fat quickly, that's also wrong. You'd lose a lot of weight quickly (almost all of it being just water weight) and then your metabolism would complete shut down due to complete lack of proper nutrition and your body would start burning muscle as much or more than fat. So, again, bad idea all around. Please don't try it.