Ключевые слова: adult, athlete, athletic, blood, cardiologist, care, check, condition, device, disease, doctor, equipment, examining, exercise, expertise, finger, fingertip, fit, fitness, hand, horizontal, hospital, illness, jogger, level, lifestyle, listening, male, man, marathon, measurement, measuring, medicine, modern, monitor, outside, overworked, oximeter, oxygen, pain, patient, person, problem, pulse, rate, stethoscope, technology, using, woman,