Body language affects how others see us, but it may also change how we see ourselves. Social psychologist Amy Cuddy shows how ‘power posing’ – standing in a posture of confidence, even when we don’t feel confident – can affect testosterone and cortisol levels in the brain, and might even have an impact on our chances for success. Her research on body language reveals that we can change other people’s perceptions – and even our own body chemistry – simply by changing body positions.

For more fantastic TED talks, follow these links for embracing other-ness, why leaders make you feel safe, superchickens, everyone has a story and the power of introverts