Coros Heart Rate Monitor: One minute review
The Coros Heart Rate Monitor is a strap-based monitor designed for your upper arm that uses optical tracking tech to measure blood volume, rather than electrocardiograph or ECG, which measures the heart's electrical signals. While many of the best heart rate monitors use ECG, optical sensors are found in the best smartwatches. Which begs the question: why does Coros' stand-alone HRM use optical sensors instead of ECG?
