Everything you need to know about photoplethysmography (PPG), the technology behind heart rate measurements in fitness ...

But it turns out more subtle color changes occur at rest as the heart pumps blood around the body. The ebb and flow of blood ...

The Garmin HRM-Pro Plus transmits heart rate data through ANT+ and Bluetooth technology. Using electrocardiogram technology ...

Living with a heart that struggles to pump effectively creates daily challenges for millions of Americans. Systolic heart ...