I like that the interviews you did were really diverse, getting multiple points of view surrounding the topic — with 2 potential users, physical therapist, and a neurological/brain look at the topic.. I found it interesting that some of our feedback lined up and looked similar!
I wish that you’d been able to observe something a little bit closer to the user. It was so hard to come up with something, and I feel that yoga was a good option because of the modifications to the practice that you can do, but it seems like you gained more insight from the interviews than the observation.
What if we’d narrowed down our user group a bit more to temporary disabilities. I think this may have helped our group in the interview process since our participants were so different and everyone has such different needs! (Not that we could have foreseen this, it just would’ve been different)