David Skaggs wrote:
Walking, especially walking up and down steps. I try to regularly go to a near by stadium and walk up and down the steps of the stadium. It doesn't bother my back at all.
Graham you have received a wide range of excellent advice. It appears to me what you do will be determined by how much time and energy you have left after the demands of work and family.
After reading all the posts I would like to add to my advice of walking ,especially walking up and down stairs, is to watch what you eat. Kevin is right you need to burn more calories than what you eat.
Your back problem will probably be better once you have lost some weight, especially the belly.