1.4 billion risk disease from lack of exercise – WHO

PARIS (AFP) - More than 1.4 billion adults are putting themselves at heightened risk of deadly diseases by not getting enough exercise, doctors are warning, with global activity levels virtually unchanged in nearly two decades.

With richer nations enjoying an increasingly comfortable, sedentary lifestyle, a study by the World Health Organization said a third of women and a quarter of men worldwide are in the firing line for killer conditions such as heart disease, diabetes and cancer unless they up their physical activity.

"Insufficient physical activity is a leading risk factor for non-communicable diseases, and has a negative effect on mental health and quality of life," said the study of world exercise levels published Wednesday by The Lancet Global Health Journal.

The WHO recommends each adult do at least 150 minutes "moderate-intensity" exercise -- such as brisk walking, swimming or gentle cycling--each week, or 75 minutes" vigorous intensity" activity--such as running or team sports.