A technology has been developed that can measure heart rate using only a smartphone camera, even without wearable devices ...

2026 study of nearly 15,000 people found the best time to exercise for your heart is earlier than most people think.

To get a sense of what average running heart rates look like for the pros, we peeked at some of their public Strava posts.

Heart Rate Variability, often shortened to HRV, has become one of the most popular recovery metrics in fitness. While resting ...

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 ...

A heart rate monitor may be the key to unlocking your fitness goals. That’s because heart rate is a reliable indicator of your exercise input—it reflects the effort applied to every workout. Keeping ...

We tested the best heart rate monitors so you can focus on the miles, not the math.

The more they train, the more runners become familiar with various statistics – mileage, pace and elevation gain being among them. But one figure that should always be on every runner’s radar? Maximum ...

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 ...

Apple's watchOS 27 will be unveiled at WWDC in a few weeks, and the latest rumors suggest the company is focused on refining ...

Micro-fluctuations in the time between heartbeats are proving a helpful indicator of mental health, stress levels and exercise capacity. They could even provide insight into how well you are ageing.