We may earn a commission if you make a purchase through one of our links. McClatchy newsrooms were not involved in the creation of this content. As you grow older, your health issues can increase, and ...

If you wear a fitness tracker, you've likely seen a stat labeled "HRV" pop up on your screen. But what does it mean, and does it matter? Short for heart rate variability, HRV has become a popular ...

Whether due to stress or an intense cardio workout, most of us have felt our heart racing from time to time. A rise in your heart rate can be perfectly normal given outside circumstances. However, ...

A dangerous heart rate is when your heart is beating too slowly (bradycardia) or too quickly (tachycardia). An adult’s heartbeat is too slow once it's less than 60 bpm, and too fast once it's more ...

Bradycardia, a slow resting heart rate, is healthy for elite athletes — but it can be dangerous if not caused by exercise ...

HRV is a relatively new metric that measures variations in your heartbeat. There’s no formal guidance on what an optimal HRV is. Your heart rate variability (HRV) is a measure of the difference ...

In TODAY.com's Expert Tip of the Day, a cardiologist explains why a lower resting heart rate can be a good sign of heart health and how to improve this vital sign. Resting heart rate — the number of ...