This question is a bit much.

Swimming the whole body is being used.
Riding the bike arms, legs, and the core is being used.
The person in the wheelchair is using there upper arm muscles, and wrist to move the wheels.
Dancing uses all of the muscles having to move a lot.

Photography has changed its subject matter quite a lot over the past few years. in the 1800's, it was considered normal for families to have  post mortem photos of their loved ones, and now that would be completely unacceptable. i think that photographers have always pushed boundaries and have been eager to capture everything, it is just society that changes their boundaries.