I'm 46 and my most direct commute would be 24 miles r/t (i do that in the cold weather). In nice weather I make it around 30 r/t. I know 2 other bike commuters from my church and they are younger and I think they have shorter commutes. I also ride some on the weekends and run 3 times a week. My goal is to bike commute everyday, only heavy morning rain, snow or icy roads keep me off the bike.