Massive, 13-year study: getting an extra hour of sleep may cut belly fat in half!

One of the major causes of chronic stress in the modern environment is sleep deprivation and disturbance. Even a single day of sleep deprivation can increase cortisol levels by over 100%. Sleep duration has been declining over the last few decades. In 1910, people slept 9 hours on average. By 1960, surveys indicated that Americans … Read more