I have been shooting for about 60 years. I am not a young guy any more but at 5'9" I weigh 163 and usually can shoot any bow I'm handed. I draw with the muscles in my back and have pretty good form. Normally I will shoot 50 to 150 arrows a day, every day. For hunting I have shot some heavy bows but found that for me something in the 45 to 50 pound range worked as well. Accuracy is more important to me than flat trajectory and speed. For target shooting I have long used a Hoyt ProMedallist, one in 32 and one at 37#. about six months ago my draw arm shoulder began to tell me something was wrong. When it got bad enough I went to the DR and am now in physical therapy trying to get out of surgery for a torn rotator cuff. This is a tough situation because I recently got a new Predator at 41 pounds that draws like a 35 and shoots like a 50. I will not be able to shoot at all for at least another month and if things don't work out I shall be off to surgery land - which means another three months of no shooting. If you have doubts about your shoulder go to the doctor now. See an Orthopedist - not a general practitioner. But do it now.
Bill C