"Lower levels of physical activity, both in organized sports and at play, account for a lot of the rest, they say. U.S. health authorities say children should be getting 60 minutes of active play a day, but only one-third are getting that.

Children are much less likely to walk, bike or skate to school than they were in the 1970s, at least in the U.S., Canada, Australia and the United Kingdom. Neighborhoods are increasingly suburban, especially in Asia, and people are driving more.

And from the 1970s till now, the number of global households with TVs, VCRs, computers, Internet access and video games has soared."

- https://www.npr.org/sections/health-shots/2013/11/20/2463167...