With the actors, she wanted, for instance, to deal with movement. "What does it feel like to adapt and adjust? What does it feel like to be in weightlessness and all of a sudden be in a gravity environment?" Jemison said. "I had to find ways to get them that feeling, so we had them in pools and walking around with weights and all kinds of things to just sort of say, when you're doing this on set … you're not going to move as rapidly."