Believe it or not that goes back to our ancestors
We used to rub dirt on our arms among other rituals before engaging in physical activity
So white folks won't tell you this but we invented the entrance (fights etc)
Edit-
I was doing this before sparring and even a few times when I fought working at the prison without paying attention. An old African inmate told me all about it and told me stop denying my history
No, he was squating and it rolled forward. It was recently. You probably talking about someone else got snapped up.
As for the topic, salute to her. She is killing it. Crazy she is super strong for a woman and regular cats in gyms up here in bumfuck Ohio moving that weight. Talking some under 200 pounds. Some over 50. Puts into perspective how different men and women really are.