Body language is a form of nonverbal communication through which thoughts, intentions and feelings are expressed physically through facial expressions, posture, gestures, eye movement, touch, and use of space. Physiological factors like hormones also influence how powerful or powerless one feels. Adopting powerful body language such as expansive poses can increase confidence and risk-taking behavior by boosting testosterone and reducing cortisol levels. Maintaining small, closed-off poses has the opposite effect.