That tension becomes especially clear with heart rate zone training, a popular five-tier system that endurance athletes use to measure effort and fine-tune performance. The well-known formula is ...

These days, it may seem like there’s a million different data points that you’re supposed to keep track of—hello, steps, sleep, and recovery scores!—and it’s difficult to know which ones are worth ...

We know the beat of our heart varies over time, increasing with exertion and slowing with rest or meditation. But, stable as those variations may appear, they vary even within those intervals. Dr.

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 ...

Heart rate variability during sleep can predict stroke, depression or cognitive dysfunction years in advance, according to new research presented at the European Academy of Neurology Congress. The ...

Heart rate variability (HRV) is the variation in the time between two consecutive heartbeats over a specific period. Doctors may use HRV as an indicator for certain aspects of a person’s health, ...

New research, presented today at the European Academy of Neurology (EAN) Congress 2025, has uncovered a powerful link between nighttime heart rhythm and future health conditions, even in people with ...

What Does a High Resting Heart Rate Mean? The ups and downs of HRV can be so tricky to navigate, in fact, that most doctors, even cardiologists, don’t factor it into treatment plans for their patients ...

For the over 1 million Americans who survive severe traumatic brain injuries each year, the road to recovery is often long and challenging. Disruption of the autonomic nervous system, which controls ...

Even mild dehydration can negatively affect your brain functioning and attention span, so it could be holding you back at work and getting in the way of your goals. Drinking a glass of water could ...

A recent study showed that the heart rate variability of a dog and its owner adapt to each other during interaction. High heart rate variability is associated with relaxation, while low heart rate ...

A post hoc analysis found that the effect of transcutaneous auricular vagus nerve stimulation (taVNS) on cardiac and inflammatory stress responses was critically dependent on variability in baseline ...