Ok, having translated the original question here's what I see. I don't train at fitness type gyms. I train in shorts, t-shirt and boots. While I do own a few items of 'sports apparel' I don't wear them that often. Girls I coach do. However, none are wearing the kinds of outfits where a thong is half way up their butts. Or belly tops.
If guys went to a gym with super clingy crotch enhancers (bulge on full display) and (and I have seen these on gay guys) vests cut so you can see 90% of their pecs then you could ask them why.
So people can, within the rules, wear what they like. But if you dress to attract attention, then get attention, they shouldn't then complain about it. The Op says she dresses comfortably so the guys are being jerks.