Either Simone Biles is wearing an exosuit that will help her defeat all of her gymnast opponents, or she’s doing something else that we have no idea about. The latter might be the correct option since, to be honest, we couldn’t even begin to tell you what Simone has wrapped all over her legs.
What you’re looking at is Simone’s legs undergoing compression therapy. The idea is to increase blood flow to her legs, which will make her an even better gymnast than she already is. So, does it hurt? The smile on her face probably says it all: yes, it hurts, and no normal person should even attempt to try this at home.