I'm 61 yrs of age and live in Murcia, Spain. I still cycle 1500km per month and this month will ride my first Spanish competitve event, a 90km ciclosportive based on Cartagena and taking in over 800m of climbing. I used to ride competively in the UK back in the 70's and 80's and rode in various national time trial championships.
I go cycling because it is one of the purest forms of exercise, is excellent for controlling weight and muscle toning and one of the best for maintaining a good cardio vascular condition. It also gets you out and about.