318,000 U.S. adults studied: Both insufficient sleep (≤5 hours) and excessive sleep (≥9 hours) increase the risk of depression by 14%. Sleeping 6–8 hours is optimal.

Imagine there was a tiny substance in your body that simultaneously strengthens your resistance to stress, optimizes your athletic...

Imagine you've just finished an intense workout – your muscles are burning, sweat is dripping from your forehead, and you feel simultaneously exhausted and euphoric. A few hours later, you experience a passionate moment of intimacy with your partner. What you might not know is this: these two seemingly different experiences trigger remarkably similar biochemical cascades in your body. Both during exercise and orgasm, the same neurotransmitters are released, similar hormone co