Ключевые слова: adult, athlete, athletics, back, caucasian, closeup, competition, competitive, cross, dirt, distance, endurance, exercise, feet, field, foot, forest, jogging, leader, leading, leg, male, man, marathon, mud, nature, outdoor, park, race, rivalry, road, run, runner, running, sport, sportswear, spray, spring, squirt, trail, trees, woodland, young,