In adults, a typical resting heart rate is 60 to 100 beats per minute, but structural or electrical disorders of the heart can cause it to rise or fall. Medications, a lack of sleep, and stress ...

REM stages and one REM stage. Ideally, you repeatedly cycle through each stage. Learn how long each stage lasts.

The time it takes the heart to return to its baseline rhythm after exercise can predict a host of cardiovascular or metabolic ...

A flair of energy in the brain in a dying patient who had “no blood pressure” or “heart rate” could be evidence ... from an ...

Most professionals regard resting heart rate as a reliable measure of fitness. But when it comes to training, keeping your heart rate in specific “zones” is more important for building stamina ...

Active heart rate measures a person’s heart activity during exercise. People can use heart rate zones to optimize workouts by ensuring that the heart rate stays within the ideal range.

Looking for the best heart rate fitness tracker? If you care about keeping a close eye on your ticker, the good news is that there are plenty of fitness trackers with heart rate monitors that can do ...