Yes, you need the protein on off days during rest days is when the muscles are healing and becoming stronger.
-------------- I must not fear.
Fear is the mind-killer.
Fear is the little death that brings total obliteration.
I will face my fear.
I will permit it to pass over me and through me.
And when it is gone past me I will turn to see fear's path.
Where the fear has gone there will be nothing.
Only I will remain
-------------- WHATEVER YOUR HAND FINDS TO DO, DO IT WITH ALL YOUR MIGHT, FOR IN THE GRAVE, WHERE YOU ARE GOING, THERE IS NEITHER WORKING NOR PLANNING NOR KNOWLEDGE NOR WISDOM.