I very frequently speak about the importance and need of getting into the relaxation response (vs. being in the stress mode) as a way to gain overall health and authentic body size. Simply put, when we’re stressed, our body releases insulin, a fat storage hormone, and cortisol, a stress hormone. Together the 2 set the stage for increased body fat and decreased lean tissue.
Now there’s nothing particularly evil about cortisol whatsoever. In fact, without it, we’d have difficulties surviving. It makes us move fast in every sense of the word when there is actual or perceived danger or threat. Certainly, in great part, after some 200,000 years our human species is alive and around to this day thanks to cortisol.
Read more here.