None at all

White magic is poetry. Black magic is anything that works.

• Victor Anderson

At first

Muscle hypertrophy is literally tearing apart your muscle so they can repaire themselves and become larger and stronger. It's a constant process and you WILL suffer all the way through it.

And yes, like black magic you need to do it carefully so you don't damage yourself permanently.

One of my workout shirts says "Satan's gym: train like a demon" and I feel it's appropriate