It should be okay for her to have her earrings out for an hour while she plays soccer and then put them right back in. The holes shouldn't close in that short amount of time. I would swab them with alcohol or bathe her before putting them back in after she's been sweating and playing outside. The end of a new earring used in piercing is pointed anyway so that will help to push it back through the hole. And, when she isn't playing a soccer game I would leave them in until the hole is established and then she can have fun changing out her earrings. It's so fun to share in each stage of our kid's growing up...isn't it.:) Or at least enjoy them until they reach those teenage years.:o