Can whey protein shake work the same for physical fitness as weights?

I think: Your question is: "will whey protein help support muscle growth that is stimulated by weight training?" the answer is yes, additional protein in the form of whey will help rebuild muscles from the breakdown that occurs because of resistance training. A good thing! bear in mind, there are many other excellent sources of dietary protein.

Hmmmm . . . : Not unless you have really heavy cans of whey protein and lift them a lot. :-) i agree with dr. Henning that whey and other proteins can support your muscle growth while you're also doing a weight resistance program. But why does not have the same functions as weights. Lifting weights train your muscles; drinking whey supports their growth. Other forms of protein include pea and soy.