On the North Branch Trail in Chicago, there are some eldery recumbant riders who are absolute speed demons. When I see eldery on uprights, they tend to be 'leisure riders', but when I see eldery on recumbants, they seem to be really in shape, people that I hope that I can be like when I am their age. Even allowing for the fact that recumbants can go faster than uprights, I'm still left with the impression that a recumbant bike must be a very valuable thing to stay in great shape in one's later years.
Has anyone else noticed this phenemenon? Any speculations on why recumbant riders appear to age so well?