After eleven years on the circuit, I have seen how demanding a race weekend is...

https://www.cast-bookmarks.win/racing-is-demanding-with-120-degree-cockpit-temperatures-and-5-to-10-pounds-of

After eleven years on the circuit, I have seen how demanding a race weekend is on the body. Drivers face 120-degree cockpit temperatures and five to ten pounds of sweat loss during a single event