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People with powerful body language—movements that tend to be more open and spread out, that take up more space—also feel confidence. They're more likely to take risks, feel optimistic, and even produce less cortisol (the stress hormone) and more testosterone (the dominance hormone). Although we've known for awhile that displaying dominance through body language contributed to a more powerful appearance, lower stress levels were also a major contributory factor.
Faking high-power poses caused people to become more confident and willing to take risks. Their testosterone levels rise and their cortisol levels decrease significantly. Conversely, low-power poses cause the exact opposite reaction. This information is interesting, but it's nothing if you can't put it into practice in real life. You want to sprawl out in stressful situations to feel more powerful, but kicking your feet up during, say, a job interview definitely sends the wrong signal.
The Art of Bullshit - Blog - Testosterone replacement & general men's health articles