We’ve tested the I-Porter as a mobility scooter alternative for people with Post Polio Syndrome (PPS).  It offers standing height operation, and superior maneuverability compared to a scooter or wheelchair.  The I-Porter engages your core muscles, lower back and legs enough to help avoid muscle atrophy, but not so much that you reach the point of harmful PPS associated overexertion.

https://www.cdc.gov/polio/what-is-polio/pps.html