A pair of studies from the U.S. Department of Energy's Lawrence Berkeley National Laboratory tracked approximately 41,000 runners for more than seven years, and found that running reduced the risk of both cataracts and age-related macular degeneration.
Researchers found that men running 40 miles a week had a 35 percent lower risk of cataracts than men running 10 miles a week. The fastest 10K racers also had lower rates than slower runners. So, to keep your eyes in tip-top shape, it helps to run faster and longer.
Reasons to Get Started With Running
Source: "Prospective Study of Incident Age-Related Macular Degeneration in Relation to Vigorous Physical Activity" Investigative Ophthalmology and Visual Science, 2009;50:101-106