Drivers regularly endure 120-degree cockpit temps and 5 to 10 pounds of sweat...

https://speedwaydigest.com/index.php/news/regional-racing-news/887335-how-recovery-is-redefining-performance-in-motorsports/

Drivers regularly endure 120-degree cockpit temps and 5 to 10 pounds of sweat loss during a race. In this piece, we break down how professional racing recovery is evolving beyond old habits