Comparing the physical hits between the National Hockey League and the National Football League involves analyzing physics, momentum, and the protective equipment worn by athletes in each sport. While NFL players engage in violent, high-speed collisions over relatively short open-field distances with massive acceleration, NHL players skate on frictionless ice surfaces wearing heavy composite pads and metal skates, reaching peak velocities that frequently exceed 25 to 30 miles per hour. Consequently, high-speed open-ice body checks into the rigid wooden boards in hockey generate tremendous localized force and kinetic energy, leading many sports physicists and athletes to argue that hockey hits rival or even exceed football collisions in raw, bone-rattling intensity.