Heart rate is one of the most valuable physiological metrics for runners because it provides objective real-time insight into how hard your body is working. Unlike pace or distance, which are external ...

The best heart rate monitors will track your heart rate comfortably, consistently and accurately ...

A few of the most important insights are heart rate variability (HRV), which describes the difference in time between the beats of your heart, and resting heart rate (RHR), which is the number of ...

Before you decide to click away, thinking we’re talking about some heart rate monitor that connects to a display using WiFi, wait! Pulse-Fi is a system that monitors heart rate using the WiFi signal ...

Using a chest strap heart rate monitor can give you accurate, actionable insights to help improve your running. What is the best chest strap heart-rate monitor overall? The best chest strap heart-rate ...

Respiratory rate, another metric in the Apple Watch vitals app, shows how many breaths you take per minute. This typically ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. February 18, 2025 Add ...

We may receive a commission on purchases made from links. When smartwatches and other wearables first hit the market, some people were skeptical that they'd be anything more than a novelty. Once users ...

Keeping track of your heart rate while working out is now easier than ever, thanks to wearables like smartwatches and fitness trackers. However, the gold standard for heart rate data is a chest strap ...