It’s been known for decades that heart rate variability (HRV) during labor signals how a fetus is responding to stress. Lower HRV—a lower variation in heartbeats—is even a risk factor for sudden ...

New research shows that even a few drinks can disrupt your heart’s nighttime recovery, smartwatches reveal the hidden cardiovascular cost, even when your sleep patterns look normal. Study: The Impact ...

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, ...

Sitting quietly at your desk, watching TV, or lying in bed at night, your heart should be taking it easy – beating steadily and calmly at somewhere between 60 and 80 beats per minute for most healthy ...

That little number on your fitness tracker might be more important than you realize. Your resting heart rate isn’t just some random vital sign. It’s essentially a window into how efficiently your ...

Understanding our body’s target heart rate zones and how they change as we age is crucial for getting the most out of our workouts. If your goal is to burn fat, for example, you’ll want to stay in ...

Yes, allergies can increase your heart rate. This may occur as a symptom of allergic rhinitis or as a side effect of an allergy medication. Learn more about prevention and treatment options. Your ...