Tsukuba, Japan—During deep sleep, brain wave amplitude increases, and "δ (delta) power," a key objective indicator of sleep quality, is observed; higher delta power corresponds to deeper, more ...

January is the month of the year when motivation to work out is at an all-time high. You’ve thrown out the holiday treats and are ready to get back on track with your health goals. For many, this ...

There’s a reason why spin class is always full to the brim at your local gym. It’s because the word is out in the fitness world, and it’s that training with a stationary exercise bike has plenty of ...