Add Yahoo as a preferred source to see more of our stories on Google. Whether it's open-water swimming, skateboarding or hiking, Lloyd Kahn doesn't let his age define him. Ninety is just a number. But ...

FIT. JUST GET OUT THERE AND DO STUFF, YOU KNOW? MOVE. WHEN I BROKE MY ARM, THE DOCTOR SAID TO ME IN THE HOSPITAL, SAID, YOU’RE TOO OLD TO BE RIDING A SKATEBOARD. AND I SAID, YEAH, YOU’RE RIGHT. A WEEK ...