Super strength or invicibility
For the females, it's straining against the bonds of gravity... but not in a flying sort of way.
This most common of metahuman attributes seems to range from a D-cup size upward for any character just past the onset of puberty (a time when many comic-book characters start to manifest superpowers). They are not only large, but remarkably self-supporting and perky for their size.
tvtropes.org/pmwiki/pmwiki.php/Main/Mostcommonsuperpower
Hobbes: Is Amazon Girl's super power the ability to squeeze that figure into that suit?Calvin: Nah, they can all do that.Calvin And Hobbes (July 22, 1992)