Jennifer, thanks for your comment. I hadn't thought about an equine assisted physical therapy. I do ride (not lately, though). An earlier respondent to another person did state that she was using riding her horse at a walk to help build those tricky back muscles. To be clear, my back muscle weakness is from para-spinal muscle atrophy. I have been told by my first neuromuscular physician that those muscles can't be built back to what they were, but can achieve some strength. I will investigate the equine therapy direction. We do have a couple of those businesses in my area. Thanks again!!!