Generally, I’m against any form of subliminal advertising, but today’s invention applies this idea in a good cause.
A subset of several, big-name glossy magazines would be specially printed to contain a few, subtly-added extra pages.
These would carry stories designed to promote a healthier lifestyle and be reserved exclusively for use in medical waiting rooms.
Ideally, the venture would be funded by extra adverts for e.g. exercise machines and activity holidays. Being much more current than average waiting room reading material, these would receive preferential attention.