For fuck sake, read, he said ALL PHYSICAL ATTRIBUTES, this includes the bones too. She is not just strong but also tough enough to handle it. Also it still kinda stung for her but that's all
It's umm imagine if your bodies strength every ounce every fiber every tendon etc had enhanced strength first of all all the other stuff skin bones etc wouldn't be able to handle you punching things at full strength etc they would break making a bloody mess it's increased strength not increased durability also if everything's is enhanced like that it would still be only 5x lol, not whatever their saying that it would be more than 5x.