You're referring to Amy Cuddy, promoter of "Power Posing" and one of the top 100 most inspiring women according to the BBC: https://www.bbc.com/news/av/world-4

You're referring to Amy Cuddy, promoter of "Power Posing" and one of the top 100 most inspiring women according to the BBC: https://www.bbc.com/news/av/world-41521671 https://www.bbc.com/news/av/world-41521671 It was later discovered that her work was fraudulent and her coauthor walked back the claims.