Ключевые слова: 400 m sprint, active lifestyle, adult, athlete, competition, contest, dash, exercising, feet, fitness, foot, jogging, marathon, one person, outdoors, preparation, race, run, runner, runner start, running, running track, shoe, shoes, sports, sports track, sports training, sportsperson, sprint, sprinting, starting line, track, training, walking, white, young, young adult,