Key points from article :
25% of people worldwide are not doing enough physical exercise.
High-income countries, including the UK, were among the least active.
In those countries figure has risen from 32% in 2001 to 37% in 2016.
Wealthier countries are transition towards more sedentary jobs and hobbies.
WHO report looked at 358 population-based surveys in 168 countries .
Public Health England says they are working to get the nation moving more.
The study was published in The Lancet Global Health.
