This person is an outlier. That's not normal. I used to do kickboxing and yes, there were a few fighters who did great in their 40s but most after a few years h

This person is an outlier. That's not normal. I used to do kickboxing and yes, there were a few fighters who did great in their 40s but most after a few years had massive injuries that prevented them from continuing. I myself have a bad knee and a bad shoulder so I can't run, cycle or swim without pain. Used to teach yoga classes. During seminars you could see older famous teachers do amazing stuff. I thought yoga is is really healthy until I found out that a lot of them had hip and knee replacements and often lived in painkillers. I believe most people simply can't do high intensity stuff from a certain age on or have to be very selective.