Your Fitbit's HRV reading can offer clues about stress and recovery, but your usual numbers matter more than anyone else's.

For the first time, German researchers have measured the influence of clouds on short-term fluctuations of solar radiation in North America. They have used a globally unique network of radiation ...

Prediction of early death among patients (pts) enrolled in phase I trials: Development and validation of a new model based on platelet count and albumin level. A multicenter phase II neoadjuvant trial ...

You might be familiar with HRV—heart rate variability—as a popular training tool for workouts and a biomarker for measuring exercise recovery. Beyond exercise tracking, heart rate variability has a ...