Rate was also measured at 30, 60 and 90 seconds at the end of the three Setting, with heart rate recorded at the three-minute point. The participants exercised for three minutes at each Rate was measured with participants resting and walking or running on the treadmillĪt various speeds. Gillinov and his fellow researchers recruited 50 healthy adults and randomly assigned each of them to wear two of four wrist-worn fitness devices with heart rate monitors (one on each wrist) while walking or running on a treadmill. All the participants also wore standard EKG electrodes and a chest-worn monitor. They have some recognizedįor example, because they’re on your wrist, optical heart rate sensors read your blood flow when it’s farther from your heart. Their accuracy also can be reduced by light hitting the sensor as you move your arm or flex your wrist. Similarly, a chest-worn heart monitor consists of two parts - a transmitter attached to a belt worn around the chest, and a receiver worn on the wrist like a watch. The transmitter picks up the electric signal and then sends an electromagnetic signal containing heart rate data to the wrist receiver, which displays the heart rate.įitness tracker heart rate monitors, on the other hand, use optical sensors toĭetect the blood coursing through your veins. On graph paper from information supplied by the electrodes. Records your heart’s electrical activity. You get an EKG, electrodes are attached to your skin and the EKG device, which Both devices detect and measure the electrical signal that the heart transmits when it beats. They work in a similar way to an electrocardiogram (EKG), which your physician uses for diagnostic purposes. HowĬhest-worn heart rate monitors are used by serious runners, distance cyclists and other elite athletes. While some wrist-worn monitors are more accurate than others, studies show they generally aren’t as accurate as chest-worn heart monitors, says Chairman of the Department of Thoracic and Cardiovascular Surgery Marc Gillinov, MD, who has studied the accuracy of these devices. We do not endorse non-Cleveland Clinic products or services. ![]() Advertising on our site helps support our mission. Cleveland Clinic is a non-profit academic medical center.
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