The Pain of Pottery

Since late February I've had a bit of lower back pain that started when I was throwing some big punch bowls. It felt like I had a pinched nerve or something, but I never got it checked out. With enough yoga I feel almost normal. Until last Monday... I lifted a heavy box the wrong way and hurt it badly. After sitting for a while I would get up and hobble along like an old lady with a bad back, so I went to the chiropractor for the first time on Wednesday. Maybe I'll feel normal again with another couple sessions. Are there any potters out there with ergonomic wheels? Any advice to make throwing more comfortable & back-friendly?