The Polar H10 is the heart rate monitor for the runner looking for consistent performance. The H10 has multiple apps you can access to help track your heart rate with noteworthy accuracy, although one of them requires to pay to access all its features.

"The Heart" pages include a beginner's guide to heart-rate monitors and also graphs of athletes' actual heart rates during triathlons and road races of different distances. Go to www.rice.edu ...

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Which heart rate monitor is the best for running? Which HR monitor is the most accurate? We get asked those questions and more all the time here at Wareable.

(For example, if you’re 30-years-old, your maximum heart rate would be 190 beats per minute.) For moderate exercise intensity, work out at a level where your heart rate is 50 to 70 percent of your maximum heart rate—so between 95 and 133 beats per minute, for a 30-year-old.