Apple Watch: Zone 2 is 60-70% of your heart rate reserve, with your “resting” heart rate set to either 72 or a number the ...

A team of scientists from Harvard Medical School and Duke University has created a new kind of tissue that can change heart activity using only light—no wires, no surgery, no harm. This groundbreaking ...

Most runners can benefit from monitoring heart rate in different ways during half marathon training. For example, you can use heart rate to set training zones, which will help you dial into the right ...