Welcome to the 3rd episode of the six-part series with Professor Sir Muir Gray, talking about what happens to our bodies as we live longer. This leads us onto talking about how we can help people to live longer, better.

In this episode we talk about disease and it's relationship to ageing and a loss of fitness. We also talk about the importance of fitness for preventing and coping with disease.

Sir Gray was knighted in 2005 for his contributions to the health service, developing Britain’s breast, cervical, maternal and child screening programmes, creating the national library for health, Cochrane collaboration and he is currently the director of the optimal ageing programme.