Ключевые слова: activity, app, autumn, background, bracelet, calories, cardio, counter, detector, device, electronic, exercise, female, fit, fitness, gadget, gadgets, hand, health, healthy, heart, lifestyle, medical, monitor, mountain, outdoor, pedometer, people, person, pulse, rate, runner, smart, sport, tech, technological, technology, timer, tracker, tracking, training, travel, watch, wearable, winter, woman, workout, wrist,