I have had my powerball (250 autostart) for a few weeks, to help with climbing strength when I can't get to a wall often.
I was at around 10k, so not too fast, and was having a quick go and there was a click in my hand which hurt quite a lot so I dropped the ball, and the doctor says I have damaged a tendon in my hand. I can't use one finger properly now, I am not sure how long it will take to get better, but I can no longer climb or do any strenous jobs, it hurts a lot if I catch my finger or move it in the wrong way.
Has anyone had an issue like this, or was I doing something wrong? I had only been using it about 20 seconds when it happened. I am not sure I want to use it again if it has the ability to damage my hand, I work in computers and it is hampering my job. I dont remember seeing any health warnings on the product.