Tanzania has the world’s fittest children, a study by Australian scientists has found.
The children were made to do what’s called a 20m shuttle run, which measures aerobic fitness.
Grant Tomkinson, one of the lead researchers on the University of South Australia report, told the BBC’s Newsday programme that Tanzania probably came top because they were more active:
You probably find that they’re obliged to be physically active so that’s why they’re at the top."
If you listen to the full interview you can find out why the unequal distribution of wealth may be why the US comes last: