Islamic school principal banned running so girls would not 'lose virginity': reports mentions allegations that a Principal banned girls from running because it could cause them to lose their virginity.
I assume that he thinks that vigorous exercise could cause a girl's hymen to be damaged (I don't know whether it's true or not, but it's a common belief), and that means that the girl isn't a virgin any more.
Is virginity defined in terms of an intact hymen in Islam?
(Side question: is virginity only defined as a concept for women, or is it also a concept for men?)