Smartwatches commonly use heart rate variability to monitor stress. Columnist Helen Thomson explores what this metric ...

There is variability in when and how cells divide during the development of embryos. While researchers traditionally believed this variability was an obstacle that needed to be regulated, a group now ...

Biological link found: Lower heart rate variability is associated with greater bedtime procrastination, suggesting a physiological basis for the habit. Why it matters: Irregular sleep timing can harm ...

This article was originally featured on The Conversation. Your heart beats around 100,000 times every day. Heart rate is a key marker of cardiovascular activity and an important vital sign. But your ...

Ocean wave climates are changing under the combined influence of global/regional climate variability, with important consequences for coastal environments, ...

Fitness trackers and smart watches are widely popular wearable devices that measure several types of health metrics, including step count, calories burned, sleep quality, Vo2 max and heart rate. As a ...

Variability is crucially important for learning new skills. Consider learning how to serve in tennis. Should you always practice serving from the exact same location on the court, aiming at exactly ...

How long did it take you to get to work today? Me? A 12 mile trip took about 45 minutes. My daughter’s bus was running a little late. My son forgot to pack his backpack last night - what a surprise.

At nanometer technologies, variability is rapidly becoming one of the leading causes for chip failures and delayed schedules. However, there is significant confusion about the term “variability” in ...