If you're a lifelong powerlifter or bodybuilder, there's a good chance you're more concerned about growing your glutes, carving your core, or building your biceps than boosting your VO2 max. But for ...

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 ...

Heart rate variability typically decreases during stressful situations, although the heart rate increases. Managing stress levels can mean a more variable heart rate. Exercise and relaxation ...

You can use the ECG Apple Watch app to detect an irregular heartbeat or rate. The ECG app is FDA-approved, but any concerning results should still be addressed with your doctor. To use ECG on Apple ...