Australia has a campaign to get its citizens from becoming Americans, called Find 30. They advocate finding 30 minutes every day to exercise, based on the research that suggests you need 60-90 minutes of moderate activity daily to control weight and health.
The British have taken a slightly different approach to finding 30.
This recreational rioting is fantastic cardio for the British. There is even a bit of resistance training from hurling those rocks at police. It won’t be long and gyms will be offering this group training class. The French might be one of the first to offer this class.