2014 NY City Marathon runners cruise along 4th Ave. in Brooklyn.

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Photo credit: © David Grossman / Alamy / Afripics
License: Licensed
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Keywords: aerobic, aerobics, america, athlete, athletes, brooklyn, challenge, city, competition, courses, distance, endurance, female, fitness, foot, group, groups, international, life, long, marathon, marathoner, marathoners, marathons, men, ny, nyc, race, run, runner, runners, running, sport, sports, training, urban, usa, women, york