Ключевые слова: activity, adult, aid, analysis, attractive, background, blood, cardiac, care, caucasian, checking, copy, day, device, digital, electronic, equipment, female, fitness, gadget, happy, health, heart, lifestyle, measuring, medicine, modern, monitor, nature, outdoors, person, portrait, pressure, pulse, rate, recreation, runner, smile, smiling, space, sport, sunny, test, text, track, training, wellness, woman, workout, young,