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.

Your "heart rate zones" might be completely wrong. Not only are zones defined differently in different apps, they are also usually calculated based on your maximum heart rate. And that maximum ...

In this era of fitness trackers, we have easy access to our heart rate at any given moment. Every so often, a number catches your eye as it flashes on your Garmin or Apple Watch while you're ...