By riding my bicycle 30 miles 3 times a week.

I ride my bicycle 30 miles at least 3 times a week and I walk with my wife 2 times a week for at least 1 mile each. My cycling takes up 2 hours with hills and trying to out run the Porsches, BMWs, Rovers, etc. My 16 pound bike has never out run these...

Cycling 3 times a week @ 30 miles each with hills and hiking 2 times a week with hills @ 78 years old. Thanks for asking.