I'm 40 and ride 28 miles RT 5 days/week, year round. We just bought a new house a little further away, so starting in 3 weeks, it'll be 41 miles RT. I've been a bike commuter most of my life, but there were periods where I stopped due to work or school commitments. I started commuting full time again about a year ago when I started a new job and I really enjoy it.