Why do nhra driver breath oxygen before race?

NHRA drivers breathe pure oxygen before a race to enhance their oxygen saturation levels, which helps improve their physical performance and focus during the intense conditions of racing. The high-speed environment can lead to increased stress and exertion, making it crucial for drivers to maintain optimal oxygen levels for better endurance and mental clarity. This practice is similar to what athletes in other high-performance sports use to prepare their bodies for competition.