Getting old and staying fit.
The outdoor recreation industry is probably headed for declines in participants, as creaky baby boomers switch to less vigorous sports. But the drop may not be as steep as for previous generations, thanks to boomers' lifelong love of exercise.
Wellner
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D000328:Adult; D000368:Aged; D003710:Demography; D015444:Exercise; D006801:Humans; D007899:Leisure Activities; D008875:Middle Aged; D010809:Physical Fitness; D014481:United States