Martial arts (BJJ wpecifically) communities are largely participated in by normal sized, able bodied males. That is males between 60 to 120kg, with all their limbs, eyesight etc and normal strength and ability to become stronger. People that fall outside of these parameters make up the minority (especially in smaller clubs). In the lenses of these parameters, other groups, specifically women are at a disadvantage due to the sexual dimorphism of our species (males and females of the same weight and training history have vastly different strength levels). Unkindly put, in this lense, if they had Male genetilia, they would be viewed has having some kind of "disability" (I prefer the term differently abled so as not to patronise). This doesn't mean females aren't worthy of promotion to greater ranks but the general criteria in bjj for a blue belt is the ability to defend yourself against higher belts. For females that is so much more difficult as they a majority of higher belts that they will roll with will be males. Therefore it seems the criteria for females requires them to defend themselves against higher belts of vastly greater strength. The skill requirement is much higher for females rolling against males but I feel it is not appreciated or acknowledged. Additionally lack of opportunities for females to roll with equally bodied peoples (i.e. with other females) creates an unfair environment as I (as a male) have a myriad of opportunities to roll with with equally bodied males. I believe this leads to the development of a skillset for females that isn't as assertive or aggressive and pigeonholed them into always playing as the smaller and physically weaker opponent which is rubbish when competing with other females. It also leads to fewer rolls were females can go all out in rolling without serious risk of injury. In the same vein of anti-racism, being anti-sexist, I believe, is important. We should probably take steps to address the imbalance in opportunities to roll. My suggestions to my club were to ensure we invite high level females from other clubs when we have seminars. Additionally I believe we should ensure and equal number of guest seminars from men and women. If women can learn from men, men can also learn from women. Would you have any other suggestions?