I am 52, and I do 27 miles each Saturday on a longboard. It takes around 2:20 to do it. When I am 70 I may not be on the longboard for those distances, but no p

I am 52, and I do 27 miles each Saturday on a longboard. It takes around 2:20 to do it. When I am 70 I may not be on the longboard for those distances, but no problem on abike i'd bet.