Ключевые слова: activity, adult, athletic, band, beat, break, cardio, cardiology, care, caucasian, check, checking, closeup, counting, device, exercise, female, field, fitness, girl, hand, health, heart, heartbeat, lifestyle, measure, measurement, measuring, monitoring, outdoors, people, person, pulsation, pulse, rate, rest, rhythm, run, runner, sport, sporty, technology, time, tracker, training, watch, woman, workout, young,