Americans are doing less and less rambling and walking and camping in the wild:

Fishing peaked in 1981 and had declined 25 percent by 2005, the researchers found. Visits to national parks peaked in 1987 and dropped 23 percent by 2006, while hiking on the Appalachian Trial peaked in 2000 and was down 18 percent by 2005.

Blame it on Guitar Hero.
 

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