Is it a good choice of cardiologists and physiologists to buy an optical heart rate watch as for instance the Apple watch for their studies?

No. Even cardiologists like Milind Desai from Cleveland Clinic from Ohio who studied the accuracy of Apple watches only studied these for sporting activities. The problem is the lack of good accuracy studies for these devices. Furthermore, 3 lead ECG devices are more accurate than optical heart rate watches like the Apple watch. We suggest …