Fitness trackers and smartwatches can make it easier to stay in your heart rate training zones. (Getty Creative) ...

The chart below from the AHA outlines the various target heart rate zones and average maximum heart rates based on age. The AHA notes that your maximum heart rate is often 220 minus your age.

Heart rate zone training has become more popular in recent years partly because of the boom in wearable technology which, among other functions, allows people to easily track their heart rates.

These zones are more than just numbers — they're a road map to more intelligent training. "Each zone can be used to optimize exercise with a purpose, such as burning fat, improving endurance or ...

Heart rate training is accessible and beneficial, guiding workouts based on different heart rate zones. Heart rate zones are ...

Zone 2 training is a type of cardio exercise where you use your heart rate as a guide to help you find the right intensity for your workouts. It’s one of five heart rate training zones ...