Oura reports that heart rate variability (HRV) measures the variation in heartbeat timing, reflecting stress levels and recovery. Higher HRV indicates well-being, while lower HRV signals stress.

Many data-driven runners have a grasp on common heart rate metrics, like resting heart rate, maximum heart rate and heart rate zones. But there’s another, often undervalued data point worth keeping ...

Of all the metrics that wearables track, resting heart rate (RHR) is an easy one to gloss over. It’s not as sexy as VO2 max, ...

A fast heartbeat can be caused by emotions like stress or anxiety. Dehydration, or drinking caffeine or other stimulants, can ...

Understanding your heart rate is crucial for more than just reaching optimal fitness–it can also help to reduce injury and ...

In a population-based cohort of healthy adults, fasting plasma glucose was strongly associated with an abnormal heart rate recovery, even after adjusting for confounding factors. The association ...

NEW YORK (Reuters Health) - Overweight children from lower- and middle-income neighborhoods may fall short of their thinner peers in one measure of cardiovascular fitness -- but the same may not be ...