Ключевые слова: abstract, active, activity, athlete, band, bracelet, check, close up, closeup, control, device, different, exercise, female, fit, fitbit, fitnes, fitness, gadget, gear, girl, gym, hand, health, heart, life, lifestyle, measure, monitor, multi, pedometer, pulse, reminder, run, runner, sleep, smart, smartwatch, sport, stopwatch, technology, timer, tracker, watch, wearable, white, woman, workout, wrist, wristband,