What's "power stance"?

Native speaker’s answer
Rebecca
"Power stance" is a pose that people do to make themselves feel more powerful. Usually, it means standing with your chest out, arms on your side, head high, and legs slightly apart. It's kind of like how some superheroes stand. It's supposed to be a self-improvement act. Ex: Sometimes, when I feel like I can't do something, I do the "power stance". It makes me feel better. Ex: Let's do the power stance before we go on stage! Maybe it will help.