That's pretty obvious, you might think, but the researchers from the Karolinska Institute and the Swedish School of Sport and Health warn that the excessively sedentary are running serious risks, irrespective of how much exercise they do when they're not plonked behind a desk, or lying on the sofa.
After taking into account differences in age, weight, sex and a range of health-related indicators, they found that just 15 minutes of moderate exercise a day increased life expectancy by three years compared to those who remained inactive.
Our research, which looked at parts of the body that easily show biological signs of aging, suggests that a restricted diet can help to reduce the amount of cell senescence occurring can reduce age-related disease."