Never compete again? I have a memory of a picture of a one legged contestant on a relay team in the '89' RAAM passing a man with no legs who was in the process of setting a record for crossing the USA on arm power. Short of being a quadriplegic There is alway some niche you could compete in. FYI the arm guy did it in 69 days. He also holds the record for walking across the USA on ones' hands, one year. A year or two later another guy who had won the LA wheelchair marathon cranked across the US in something like 18 days. I paced that dude in Death Valley one night. He was doing 18 MPH.