Ключевые слова: activity, app, athlete, bracelet, calories, counter, detector, device, electronic, equipment, exercise, fit, fitness, gadget, gym, hand, health, lifestyle, like, male, man, measure, modern, pedometer, person, pulse, rate, red, smart, sport, technology, timer, tracker, trainer, training, tshirt, watch, wearable, weight, wrist, wristband, young,