Just what's waiting to come and bite us on our (sedentary) behinds.Once again, the perils of a sedentary lifestyle have hit the headlines, and rightly so. According to the British Heart Foundation, the average person will spend a fifth of his or her lifetime, that's over 70 days a year, sat down! This is a staggering figure, and we are setting ouselves up for a whole lot of trouble unless we get up and get moving. This article from the BBC gives us some sage advice. For all too many of us, it's not going to be old age that gets us, but being static.