A third of the world’s adults are physically inactive, and the couch potato lifestyle kills about five million people every year, experts said in the medical journal The Lancet on Wednesday.

“Roughly three of every 10 individuals aged 15 years or older — about 1.5 billion people — do not reach present physical activity recommendations,” they said in a report that described the problem as a “pandemic.”

The picture for adolescents is even more worrying, with four out of five 13- to 15-year-olds not moving enough, it said.

Physical inactivity was described for the study as failing to do 30 minutes of moderate physical activity five times a week, 20 minutes of vigorous activity three times a week, or a combination of the two.

Inactivity increases with age, is higher in women than in men, and more prevalent in high-income countries, the researchers found.

A second study, comparing physical activity levels with population statistics on diseases like diabetes, heart problems and cancer, said lack of exercise claimed more than 5.3 million of the 57 million deaths worldwide in 2008.

It said inactivity was a risk factor comparable to smoking or obesity.

Physical inactivity kills 5 million a year: report – Yahoo! News Canada