I really like Amy Cuddy’s TED Talk: the highlight is that there is evidence that adopting a pose of confidence can improve your confidence. Something as simple as setting your posture can have an effect on how you feel. Standing like a superhero can give you a real boost…
Only maybe, because science isn’t as simple as that. Anecdotally, I’ve had feedback from PhD candidates who have tried this and found it’s worked for them. Researcher developers tell me it has helped their confidence before big presentations or meetings. I can’t guarantee it will work for you, but you won’t know either way until you try it.
Confidence doesn’t begin and end with putting your hands on your hips. Confidence is action. What will you do to build and maintain your confidence? Big and small things help, long term practice and short term boosts.