There's a crisis in old age care - not just in the UK, around the world, as population demographics shift, and the proportion of older people increase - there's a worry about who's going to look after them, and how much is it going to cost?

However, a new analysis on bmj.com says this picture need not be so gloomy - they say that encouraging exercise in older people could save billions - by keeping frailty at bay and increasing healthy life expectancy.

We're joined by two of the authors of that analysis - Scarlett McNally, consultant orthopedic surgeon at Eastbourne District General Hospital, and Muir Gray, public health doctor.

Read the full analysis:
http://www.bmj.com/content/359/bmj.j4609