A person’s heart rate variability refers to the way in which their heart changes its rhythm with each beat. A higher number indicates resilience and longevity, while a lower number shows the body ...

Here’s everything you need to know about heart rate variability and why it’s so complicated—plus how doing a deep dive into yours could potentially help improve your performance. You know ...

Thanks to the proliferation of smartwatches and fitness trackers, it’s never been easier to log your heart rate while running: Simply don the device, start your workout, and watch those beats ...

Objectives: To investigate the reliability of heart rate variability (HRV) measures at rest and during light exercise in children. Methods: Short term (five minute) HRV was assessed in 12 children (11 ...