No, I don't think so, I did the same thing. I went from a 49# recurve to a 65# long bow, then to a 70# long bow. But! I was constantly working out at the time! Don't make that jump if you're not in shape for it! Otherwise your shooting form will suffer!! I'm still young, (25), but I took a hiatus from shooting for one year. Long story, but marriage and kids changes things in a hurry, and I stopped working out... couldn't shoot my 70#der like I should, nor my 65er like i should. Need to work myself back into it again. My suggestion? Start doing what I call lawnmower pulls, pushups as well, you need to strengthen your core as well as your back muscles and develope your endurance. What it sounds like to me is you've overbowed yourself. Train yourself to shoot it. Just because you can draw it, doesn't mean you can CONTROL it. Get them muscles used to drawing that bow, every night sight in the kitchen and just work on drawing that bow. Come to full draw, hold for 5-10 sec and let down. If you shoot it, even if its only 12 shots and you feel fatigued, put the bow down. You'll only hurt yourself and your form if you keep going. With a little determination you'll get there. Hope this helps, it worked for me, and is what I'm doing again. Walt