Ключевые слова: activity, artificial, athlete, athletic, background, clean, color, competition, course, detail, equipment, exercise, floor, forward, ground, health, lane, line, material, outdoor, paint, play, race, racetrack, red, road, rubber, run, safe, soft, sport, sprint, sprinting, sprints, stadium, surface, texture, textured, track, training, wallpaper, white,