Hi Christina, and welcome to the Disney Parks Moms Panel!
Three cheers for Disney's All-Star Sports Resort! We've stayed there multiple times, and my son especially loves to run on the football field. It's a great way to expend some of that Disney energy, too!
The All-Star Resorts are separate, but they basically work like one big resort. I called the concierge desk to verify that Guests of one All-Star Resort can use the pools at the other All-Stars and the Cast Member said that you can! So feel free to visit the All-Star Music and All-Star Movies Resorts and dive in!
The pool hours vary by season and even by pool, so you should check the posted hours at the pool each day. Your resort concierge can help you with this information.
I hope this helps you have a splash-tastic Walt Disney World vacation, Christina. Please come see us again if you have any more questions. We love to help!
Keep Disney Dreaming,
Kathy K.