Every week or two, I'll open an athlete's training log and it seems like a blood-curdling scream leaps off the page. "My body is being weird! My heart rate was way too high on this run!" Or . . . "My ...

Your resting heart rate is the number of times your heart beats per minute while your body is at rest – when you're sitting or lying down, having not engaged in much physical ac ...

Screening individuals for atrial fibrillation (AF) using wearable devices is more cost-effective than screening using conventional methods such as 12-lead electrocardiogram (ECG) and pulse palpation, ...

Wearable devices can now track a wide range of data, but resting heart rate (RHR) seems to be frequently overlooked. Meanwhile, VO2 max is often hailed as the ultimate indicator of aerobic fitness.

Most trackers are made to be worn on the wrist – but is that really the best place to wear a fitness tracker? The popularity of fitness trackers has made for a crowded marketplace. There are now ...