Once they have had time to pick bunks and get acquainted with the room their "mom" has them all get in uniform. (Bella asks if she's supposed to change somewhere else. Crane tells her to get over it. That wasn't what she meant, but she shrugs and changes with everybody else.) Oat's uniform is obviously cut down from a larger one. They get to eat, which everyone is delighted to do because they didn't do so before their launch. And now they are all supposed to troop to the gym, which they will have to be in on a daily basis to compensate for the low gee. They are not to be out of uniform at any time they're not in the shower, at which time they should either be actively in the water or wearing a towel. The gym is nice and cold so this shouldn't present a problem. Look at all this nice gym equipment, go exercise.