There are going to be a lot of people with severe shoulder problems a few years down the road. When you' ve got bad shoulders to start with, you can darn sure feel the strain they put on those joints.
Looking back after I have developing tendonitis from shooting radical cam bows, I am now only able to shoot about 15 arrows twice a week on my compound. This is down from shooting about 150 arrows. Since, I am so limited now in my shooting the compound, I only practice with my hunting setutp including broadheads for practice, and I will not change the setup often. I now have to take medicine before I shoot, and ice the shoulder on a daily basis whether I shoot or not. I have now come full circle, from recurve/longbow to eccentric wheel bows, to radical cam bows, to eccentric wheel bows, and I' m sure that I will be back to my longbow only soon (which is 100% fine with me). My only regret in the circle was ever going to the radical cams. Mainly because archery is something that I want to enjoy for the rest of my life. One thing that I have learned over the years that I will pass along is: what partical bow you shoot, what cams you use, what broadheads or arrows you use, blah, blah blah, is not what makes you an archer.