The last topic that I could find about this was 2005. Over the years, there have been conflicting reports on the use of the swiss ball as a chair, and I myself thought it a gimmick or dangerous at first.
However, my office chair just broke and, while waiting for replacement, I’ve switched to a swiss ball. Now, I have a history of back pain which the doctor diagnoses as strain, so I was averse to putting even more stress on my back. Anyways, I’ve been using it for about 2 weeks, and my previous back pain has vanished. I can deadlift and squat again.
Does anyone else use the swiss ball as a chair