Ключевые слова: activity, adult, app, beat, cardio, cardiology, care, caucasian, check, checking, counting, exercise, female, fitness, gadget, girl, hand, health, heart, heartbeat, lifestyle, measurement, measuring, medicine, outdoors, park, people, person, pulse, rate, rhythm, run, runner, running, season, smartwatch, sport, sporty, summer, time, tracker, training, woman, workout, young,