Understanding our body’s target heart rate zones and how they change as we age is crucial for getting the most out of our workouts. If your goal is to burn fat, for example, you’ll want to stay in ...

Medically reviewed by Anisha Shah, MD Key Takeaways A heart rate over 100 bpm or under 60 bpm at rest can be ...

If you’ve ever worried about your heart rate during exercise being too high or too low, you’ll want to read this. Your "heart ...