Ключевые слова: action, active, activity, african, african american, american, athlete, athletic, body, boot, boy, competition, concept, data, data processing, exercise, fit, fitness, foot, footwear, gym, internet connection, jogging, lace, leg, leisure, lifestyle, male, mixedrace, muscle, muscular, one person, people, processing, prosthetic, prosthetic leg, recreation, run, runner, shoe, sport, sportswear, sporty, stair, staircase, stairway, strength, strong, technology, technology concept, teenager, training, tying, workout,