Well, she was in incredible shape to begin with so this isn't unexpected. At least not be me. I'd expect someone in her shape to bounce back quickly. Back when humans were mostly nomadic hunter gatherers and all of us in incredibly good physical shape, if you were healthy, women had babies and moved with the group/tribe the next day. We were made for this. It's our sedentary lifestyle that makes this seem odd when it should be the norm.
Serena Williams fined $17,000 for three violations in US Open final loss. Williams was fined $4,000 for a coaching violation, $3,000 for breaking her racquet and $10,000 for verbally abusing chair umpire Carlos Ramos after a loss to Naomi Osaka, in which she complained the in-match penalties she received were sexist. Ref. USAToday.