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