Oh I had to to give up the upper body part of it more than a year ago because of shoulders and neck, we just kept discovering more and more about the pathologies underlying all of it. In the last year I could only use kettlebells for swings - which, if done properly, is NOT an upper-body exercise but uses the hips and legs for a good cardiovascular workout. There are many other kettlebell lifts for the upper body, such as the single-arm snatch, jerk, and Long Cycle (the last one was my chosen competition lift - it's a clean and jerk with a KB). And yes, it's not good for my upper body strength but what can I do? Isometric hold exercises IS an option, still researching if it could adversely impact my torn tendons in the one shoulder. It's is good for muscle strengthening, so it COULD be an option.