Although a completely sedentary lifestyle is dangerous to your health, being a little chubby while living an active life does not dramatically decrease life expectancy. "A baby born today in the West can look forward to between six and eight years of extra life compared with one born in 1970. ... Professor David Leon, an expert on population health at the London School of Hygiene and Tropical Medicine, who analysed the figures in the International Journal of Epidemiology, said: 'There is a tendency for people to talk about things going wrong. But it is important the public are made aware that, so far, things are going right.'"