1. You need to cover the chain for safety during operation.

2. You need foot straps and side leg protectors/support.

Could this possibly exercise leg and foot muscles of people with no lower mobility due to spinal/nerve injuries?

I was like: wow this is actually genious… oh.

They is surely people whose handicap allow to use their legs but not to stand up. Come to think of it, I know some people who are this way.

Wall-E?

To qualify for a wheelchair under American insurance, you have to be unsafe to use a walker or cane for mobility, be primarily wheelchair bound (need person to help transfer you or have enough upper body to transfer yourself), etc. Most patients I think of that I discharge with a wheelchair would not be able to use this device…

For those that can use something like this, there are so many micro mobility things out there. As someone pointed out recumbent bicycles already exist.