Formula 1 drivers lose significant weight during races

Formula 1 drivers can lose between 2 and 4 kilograms of body weight during a single race, primarily due to extreme dehydration and fluid loss. The cockpit environment acts similarly to a sauna, with temperatures often exceeding 50°C and sometimes reaching 60°C in high-humidity locations like Singapore. This heat is generated by the engine, hybrid systems, hot asphalt, and the drivers' own fireproof gear.

Beyond the thermal stress, drivers face intense physiological demands. They must endure G-forces exceeding 5G during braking and cornering, requiring significant strength in the neck, arms, and torso. Cardiovascular strain is also high, with average heart rates maintained between 160 and 180 beats per minute for the duration of the race. These combined factors can lead to a caloric expenditure of over 1,000 to 1,500 calories per race.