Authors:

The whole body-mind thing comes into play, when you are feeling that self-doubt and your body is not going to help you if you're not paying attention. Your body's going to go with the self-doubt and make you feel worse, so by making the adjustments - pulling your shoulders back, standing up straight, walking in a more sort of expansive way - all sorts of little things will help pull you out of that self-doubt.

Source: www.marieclaire.com
The whole body-mind thing comes into play, when you are feeling that self-doubt and your body is not going to help you if you're not paying attention. Your body's going to go with the self-doubt and make you feel worse,