Heart rate is one of the most valuable physiological metrics for runners because it provides objective real-time insight into how hard your body is working. Unlike pace or distance, which are external ...

Add Yahoo as a preferred source to see more of our stories on Google. Using a chest strap heart rate monitor can give you accurate, actionable insights to help improve your running. What is the best ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." These days, it may seem like there’s a million different data points that you’re supposed to keep track ...