Formula 1 drivers typically lose about 2 to 3 kilograms (approximately 4 to 6.5 pounds) of body weight during a race due to intense sweating and dehydration
. In extremely hot and humid conditions, such as at the Singapore or Malaysia Grands Prix, this weight loss can be even higher, reaching up to 4 kilograms (around 9 pounds), which can represent 3-4% of their body weight
. Some reports mention losses of 5 to 6 kilograms in very challenging races, especially when hydration systems fail
. This weight loss is primarily caused by the extreme heat inside the cockpit, which can exceed 50°C (122°F), combined with the physical demands of driving at high speeds while wearing multiple layers of protective gear that limit cooling
. The drivers sweat profusely to regulate their body temperature, leading to significant fluid loss. Because the total weight of the car plus driver must meet minimum regulations, drivers are weighed after the race to ensure compliance and to monitor their health
. Losing too much weight can be dangerous and affect performance, so drivers hydrate extensively before and after races to manage this. In summary:
- Average weight loss per race: 2-3 kg (4-6.5 lbs)
- In hot/humid races: up to 4 kg (9 lbs) or more
- Cause: heavy sweating due to cockpit heat and physical exertion
- Importance: post-race weighing ensures minimum combined weight and driver safety
