I am turning 70 on Friday and started riding about a year after I retired. Started with Schwinn Park Avenue from Walmart and have moved up to a 2003 Allez Specialized Sport that I have converted to straight bars. Went out with a friend today and rode about 20 miles on the paved bike trails here in NW Arkansas, at an average of 10.5mph. They have a bike clubs that I would like to go with, when they start up their rides again, but they said they average 14 to 17mph and I am not sue I can keep up that pace for 25 or 30 miles. I was going to the gym 3 times a week but find riding 3 or 4 times a week to be much more fun.