Fit or Fat.
A recent study for the Nature Conservancy found per-capita visits to national parks have been declining for years. Americans are less interested in spending time in natural surroundings like national parks because they are spending more time watching television, playing video games and surfing the Internet.

National park visitation data starting in 1930 peaked in 1987 at 1.2 visits per person per year. But by 2003 it had declined by about 25 percent to 0.9 visits per person per year. Researchers tested more than two dozen possible explanations for the trend and found that 98 percent of the drop in national park visits was explained by video games, movie rentals, going out to movies, Internet use and rising fuel prices. Other possible explanations such as family income or the aging population were ruled out.

A similar correlation has been found linking television viewing with childhood obesity. Surprise, surprise.