i don't even know how you can compete in the wind! a steady wind might be manageable, but gusts suck.
45# is just right i think. i have had some fun with it, but time has gotten away from me. we also have had some wind issues. i need to set up in a better place, but at this time of the year, no place is wind free. it's going to be one of those years......
as for the building muscle, the draw does not seem to be a problem. i do some weight lifting, but for toning, not bulk :-D that, riding, and farm work, seem to have given me enough strength for this hobby.