Medical Xpress: Zone 2, 3, 4? What do heart rate zones mean for your health? Runners, cyclists and gym-goers with wearable fitness trackers are no doubt familiar with the five "heart rate" zones.

Understanding the Context

Ranging from low to very high intensity, these zones are calculated as ... Zone 2, 3, 4? What do heart rate zones mean for your health? Runner's World: Is your resting heart rate healthy?

Key Insights

Here’s how to check – and what to do if yours is too low or too high Is your resting heart rate healthy? Here’s how to check – and what to do if yours is too low or too high Runner's World: Having Trouble Sticking to a Zone 2 Heart Rate on Your Runs? Here's What Experts Say to Do Having Trouble Sticking to a Zone 2 Heart Rate on Your Runs? Here's What Experts Say to Do GQ: What Your Heart Rate Should Be While Exercising, According to Experts