http://lifehacker.com/how-bad-posture-can-affect-your-brain-493738180

It's not as though slouching will give you a hunchback in a day, but "if you do this day after day, and your muscles are not strong, the whole skeleton changes," Dr. Golubic says. But we do know that when you slouch, you project an attitude of depression and low motivation." When you sit up straight, he adds, "psychologically, your attitude is better." - http://bit.ly/13tHa5j