Several athletes at the Olympics have looked as if they're dancing just before they set off to compete, but they are visualizing.

Though it might feel great to finish a workout and see "calories burned" pop up on your smartwatch, that number is often surprisingly inaccurate, with estimated error rates of 30%–80%. The watch's ...

By Dr. Liji Thomas, MD By turning so-called “motion artefacts” into valuable data, researchers reveal that the natural dynamics of loose garments may hold more predictive power than tightly strapped ...