Racing takes a serious toll. Between 120°F cockpit temperatures and 5-10 lb...

https://raymondsbestdigest.tearosediner.net/the-physics-of-pain-g-forces-neck-strain-and-the-reality-of-driver-wellness

Racing takes a serious toll. Between 120°F cockpit temperatures and 5-10 lb sweat losses, drivers need more than just grit