Just turned 65 and got into biking about 3 years ago, both for exercise and pure enjoyment. I used to ride a WalMart special until last year. Then last May, we bought two GIANT REVIVES, (havn't seen this bike mentioned in the forums) one for my wife and one for me. I have to say, the REVIVE peaked my desire for biking. Same goes for my wife. It is a semi-recumbent and by far the most comfortable ride either of us have ever experienced. I read some internet reviews saying that it is only good for a few miles, then use another bike. I say, "hogwash". I rode the bike 5-6 times per week, usually between 12 to 25 miles each day. Also, as an ex phy. ed. teacher, I have always been into some type of exercise, and the REVIVE can work up a sweat and get the heart pumping just like any other bike, as it is still the same old leg power that makes the wheels go around............
As far as supplements, we both take a multi vitamin and have been taking glucosamine chondroitin for years.
Obviously I have slowed down from what I used to be, but only because of my arthritic knees. Also had a heart attack three years ago(in the family, but nothing else wrong), but feel great now. Angioplasty and two stents!
As far as biking, I biked as a kid, but then really didn't start againg until three years ago.
Most of my rides are on paved bike trails and city/country streets. I am fortunate to live only two blocks from a very nice paved trail (14 mi. round trip) and a mile from another paved trail (12 mi. round trip). Many time I do both trails on the same ride.
Last year, May to October, I did about 1300 - 1500 miles.
My other physical activities include working out on either a treadmill, recumbent exercise bike, or a Schwinn Airdyne Evolution bike, at least five times per week for a minimum of 45 minutes per day.
All in all, I can't wait for warmer weather to arrive so I can start riding again.