... usando os acelerómetros dos telemóveis:
http://www.bbc.com/news/health-40570442
Citando:
"The key ingredient was "activity inequality" - it's like wealth inequality, except instead of the difference between rich and poor, it's the difference between the fittest and laziest.
The bigger the activity inequality, the higher the rates of obesity.
Tim Althoff, one of the researchers, said: "For instance, Sweden had one of the smallest gaps between activity rich and activity poor... it also had one of the lowest rates of obesity."
The United States and Mexico both have similar average steps, but the US has higher activity inequality and obesity levels."
