RE: Poundage question from a 31 y.o. woman....
Following shoulder surg. I had no problem killing deer at 32# using Magnus Stingers.
That said, there is no substitute for shooting to build up muscles. The act of drawing a bow uses muscle groups ina way not typically utilized. Pulling bands can help but only if done in similar fashion to drawing a bow. Also, drawing your bow regularly while on stand in the cold can help when the moment of truth comes.
Good Luck.