protein and morning cardio?

[JConrad]

I am about to start my first cutting phase and I'm going to start morning cardio (I have done it before many times when I was fat and lost over 40 pounds) I have heard many people say that its good to have a protein shake prior to morning cardio- is there a specific reason for this?
Thanks.

[Built]

Prevents muscle catabolism.

If your version of AM cardio is the same as mine (a 20-minute walk) don't worry about it. If it's more than this, do the shake. If it's HIIT, feed it the same as weights.

[Fat guy]

i should take protein shake how many minutes before i run?

and one more question,shouldnt i run on an empty stomach to burn alot of fat,I know i will also lose muscle,do you know the percentage?when running do we lose fat or muscle more?