There is a big controversy with the problem related about to allow or not mixed contests between men and women.
On the one hand, it's obvious that men are physically stronger than women. Their physical characteristics are more prepared to do extreme activities, such as competition sports. In these situations women are in disadvantage because they are "worst" to bear that point of effort.
On the other hand, it's very enriching mixing sexes on sports, because like that, there is not any barrier between us. It is an advance for all the people. It does the difference between women and men littler, so the sexism could go down.
In my opinion, for contests it is better to separate women's sports teams and men's sports teams. It is juster, because men are physically "superior" than women.
But for recreational sports it's better to mix sexes in these sports.