I have some experience with this, but can you tell me a little more? What condition has them in a chair? Can they get themselves in and out? Do they have full use of their upper body? Can they activate abdominal muscles or even glutes? How old and physically fit? I’d love to give you some ideas but wouldn’t want to give stuff that doesn’t make sense or isn’t safe.
I’ll say this, dependent on your clients abilities they are only limited by your imagination! The more creative you are the more successful they become! I have some great stories to share.