What does posture say about your self-esteem? Slouching comes across as sheepish and unhealthy, whereas good posture displays a sense of confidence, regardless if you are feeling it. Stand tall and relax your shoulders. Think about elongating the spine and holding your head straight so your eyes gaze forward. Also maintain good posture while sitting. Good posture brings a host of mental and physical benefits including a stronger core, better breathing, and less stress.