Compared with other areas around California—or the world, for that matter—gravity doesn't seem to have quite the same pull on the students at Free Flow Academy. Inside the training facility, you might see youngsters leaping from wall to wall or teenagers twirling gracefully through the air. Before you lodge a formal complaint with NASA, know that Free Flow is home to an array of hardcore exercises such as parkour, aerial silks, and mixed martial arts. For those looking to burn calories in a more traditional way, the instructors also lead kettlebell and strength-training classes. Its 20-deep team of instructors even teaches more grounded activities such as acting and music, uniting myriad art forms.