Ключевые слова: adult, app, application, arm, athlete, athletic, cell, champion, determination, device, display, earphone, exercise, exercising, fit, fitness, gadget, headphone, health, interface, jogging, lifestyle, listening, man, marathon, mobile, mobile phone, modern, music, outside, person, run, runner, running, screen, smart, smart phone, smartphone, speed, sport, sporty, technology, training, using, watch, young, young adult,