How do you feel about some male born now female athletes winning medals and breaking world records in female sports leagues?

While an extreme and rare scenario you propose, then yes. There should be some limiters based on physical characteristics. However, you make it seem as if people are going around changing their gender on a whim just to go around beating on the other gender. I can assure you lady, it's too much time and energy. Stop making up stories in your head then asking hypotheticals based on those delusions.

That is bad, should not allow men to compete with women. Man who believe he is woman had mental problems. 

It shouldn't be allowed. Allowing this will end women's sports. 

That is grossly unfair. Males must not be allowed to compete against females. A man who believes he is a woman has mental health problems. Deluded people must not be humored. Ban all men from women's sports. It is OK to be nice to suc h deluded men, but humoring them must not go too far!

Cheated...                          !

That's the unexpected result of pushing for equality by feminists.

Name just one. Athletes are tested these days.

Well, I'm not republican so I'm not spending 100% of my time being angry about it for no reason.

that's not right .......................

I think that they are pathetic losers who know full well that they could never compete with their fellow Man so they take beating women half their size as some sort of accomplishment. If these freaks get their own way, there won't be any female sports in a few decades.