Forget about age and just do it. It is very wise to have a cardiac stress test to make sure that you do not have silent ischemia that could kill you. My best bud, and partner in practice, died at age 45 due to severe coronary disease - died in bed. He was a marthon runner.

I'm pushing 68, ride everyday and have 1500 miles on my new Trek Madone that I bought earlier this year.

Billy