Making this facial expression can boost your performance by 20%, according to science

Furrowed brow. Squinting eyes. Frowning mouth. Most of us subconsciously make a face when we’re intensely concentrating on a task, whether it’s lifting a weight in the gym or catching up on emails.

Olympic gold medal swimmer Michael Phelps went viral at the 2016 Rio Olympic Games because he was caught scowling intensely while warming up before his meet.

“I was in my own zone,” Phelps told NBC’s TODAY in a 2016 interview.

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.@MichaelPhelps is so dedicated he even studies his game face. #Machine #PhelpsFace pic.twitter.com/ktI7o1X0nC

— #TokyoOlympics (@NBCOlympics) August 11, 2016