Ключевые слова: 2017, aged, asphalt, athlete, athletic, background, caucasian, elderly, exercise, forest, green, hand, hill, jogging, male, man, marathon, men, mountain, old, people, race, road, run, runner, runners, running, senior, sochi, splashes, sponge, sport, spring, track, trail, trees, uphill, watch, water, water point, young,