Called Fit for London 2012, the campaign, designed to give practical advice to people who want to get fit, features adverts on more than 100 local bus backs. These show people swimming, cycling, running and playing wheelchair tennis. There is also a poster and leaflet drive.
This quarter, the authority's magazine is an Olympic special edition.
Its 3,000 copies are available at GP surgeries and hospitals.
Fit for London 2012 also has its own website, www.fitforlondon2012.nhs.uk.