TED talks are a great way to educate yourself. Amy Cuddy, who is a social psychologist and associate professor at Harvard Business School, completed some really interesting research in body language and it's effects in physiology. Amy Cuddy's research which was collaborated with Dana Carney, showed that 2 minutes of standing in a power pose that displays dominance, increases testosterone by 20% and lowers cortisol hormone (stress hormone) by 25%.
In the the politics world, if you pay attention, you will notice that leaders use power poses to display power and confidence. It is very interesting to know that if you stay in these poses it will lead to physiological changes within the body. This research is proof that the body and mind are connected and it is a two way street.
This research backs up that "fake it until you make it" is a real concept and Amy Cuddle likes to call this "Fake it until you become it." This research can help people in social situations, such as interviews, to boost their confidence. This technique can also boost your confidence before competition events. It may even boost your performance since testosterone and confidence are both correlated with performance.
I would like to see more studies of power posing for longer durations and it's effects on hormones. This is something that can really benefit athletes. In my experience, most successful athletes already use this without knowing it's benefits. I always noticed how successful athletes always have a presence when they enter the room. They always display a strong non verbal communication.