There are at least two old ladies in our village (in their eighties) who go everywhere on their bikes, and have done all their lives. They're both as fit as fleas. Among the country folk in Norfolk there are very few who are obese. We sometimes visit a Morrison's supermarket out at Fakenham, (in the sticks) and it's quite noticeable that most of the customers are slim and fit-looking whatever their age. And I bet very few go to a gym or wear sports clothing particularly!
We also visit an Asda on the outskirts of Norwich, in quite a deprived area, and my Lord, we can't believe the sights to be seen there. Enormously fat people of both sexes and all ages. I should think diabetes is rife, not to mention heart problems etc. (I'm definitely not slim, but not obese either) It really is an epidemic.
But gyms are expensive. My husband used to go to one and was fantastic on all the machines & weights etc. But it became too costly for him to continue.