Ключевые слова: active, adult, athlete, back, caucasian, cold, competition, exercise, falling, fit, fitness, forest, frost, group, health, jogger, jogging, lifestyle, male, man, marathon, motion, nature, outdoor, park, person, pine, race, real, rear view, run, runner, running, shoes, snow, snowfall, snowy, sport, trail, training, white, winter, woods, young,