My worst injury came while I owned the shop. We all often picked up bolts of fabric with one hand by the end of the bolt. This produced a repetitive injury common among shop owners/employees that was just like tennis elbow. When I realized both my arms hurt most of the time, I trained my staff to pick up bolts in a "hug" motion, rather than with fingers and palm. A friend who owned Quilt Country in Lewisville, TX, was in a sling for months due to this injury. It hurts for a long time and rest seems to be the main treatment!
Jan in VA