The Sex Differences in Soccer

The NFL has approved a helmet designed to reduce concussion in quarterbacks specifically. I will no doubt have more to report on this one when I meet the NFL annually. Rugby is still evolving and growing, but you could accelerate that even more by giving them equipment that overcomes some of the challenges that they have because of sex differences. Is there any difference in soccer in terms of the bull size? Honestly, not at the elite level as otherwise that article wouldn't exist.