The only two at my office that ride bikes are me at 40 and another guy who's in his mid-50's. However, that's a completely random thing. It really has nothing to do with age - it's about how people prefer to spend their time. The other people at my work either live in the 'burbs or are too busy in the evening or are averse to getting sweaty to bike. My primary reason for biking to work is to keep my car in the garage to increase its longevity, and biking is fine with me because I don't do anything in the evenings except go home to eat and sleep . We have zero walkers in my office, due to the poor weather here and the bad town layout.