A 2 minute power pose reduces stress and increases confidence. Harvard Business School Professor Amy Cuddy discusses Power Posing. Using a few simple tweaks to body language can help people become more powerful. “Power poses” don’t just change how others perceive you, they immediately change your body chemistry”. Power posing has been proven to increase levels of testosterone and lower levels of cortisol. Spending two minutes “power posing” with your arms or elbows out, and your chin lifted and your posture expansive has been proven to increase confidence and lower stress.