Best Heart Rate Monitor for Running – Wearing the Scosche Rhythm24 on the upper arm
The Scosche Rhythm24 uses two different colors of light to provide a more accurate optical heart rate measurement. Photo: iRunFar/Eszter Horanyi
The Scosche Rhythm24 uses two different colors of light to provide a more accurate optical heart rate measurement. Photo: iRunFar/Eszter Horanyi