Someone who used to run marathons ended up in a wheelchair. She was devastated to not be able to run anymore, but after some thought, realised it wasn't the use of her legs that made the marathon so pleasurable, it was the 'team' effort and being involved with a cause 'for the greater good'.
She retrained using a wheelchair and continues entering marathons, now saying she enjoys them better than ever before.
I used to LOVE walking my black lab over the hills for miles. It was real therapy. Now my legs don't work so well, I haven't replaced dog-walking with something else because I can't think what else would be as therapeutic. The same goes for gardening. Except that with gardening people have suggested I do table-top gardening, and it just doesn't do it for me. It's not just the "getting my fingers dirty", and it's not just "being outside in the fresh air" because sitting and watching someone else garden doesn't fulfil me!
In the same way, I can't imagine sitting and watching other people walk their dogs will be the same therapy that it used to be.
But I can't say why! So I was hoping doggie people might be able to identify what it is about walking your dog that is so therapeutic?