A (gridiron) football helmet typically weighs between two and four kilograms (four to eight pounds) according to various gridiron helmet manufacturers.
In this weight is included the face masks which are compulsory at all levels of organised gridiron football. The face mask can account for as much as half of the total mass of a gridiron football helmet, but more typically accounts for around a third of the total.
On average, gridiron football helmets are the heaviest form of head protection apart from helmets for such purposes as deep-sea diving. This is because of the thick shells necessary to absorb the energy of the impact such that the headform acceleration exceeds 300g. The shell must also resist penetration of a falling 60 degree conical anvil with specific dimension.
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The average weight in a professional athlete all depends on who the athlete is playing for and where they are playing. They have some athlete's who only sit on the bench. This also depends on the weight and height of the athlete.
there is no specific weight for a cheerleader. it all depends on your basic body type and height, and family history.