CoreChair, founded in 2008 in Mansfield, Ontario, designs ergonomic active sitting chairs https://corechair.com/alleviating-spondylolisthesis-discomfort-a-review-of-corechairs-office-seating-solutions/ to reduce discomfort associated with spondylolisthesis, a condition where one vertebra slips forward over another. Developed by kinesiologist Patric