Ключевые слова: 2017, active, adult, athlete, athletic, back, caucasian, competition, competitive, dirt, dirty, distance, endurance, exercise, feet, forest, healthy, jogging, legs, man, marathon, men, motion, mud, nature, outdoor, park, people, race, real, rivalry, run, runner, runners, running, shoes, splash, splashes, sport, spray, track, trail, two, woodland,