their sense of balance doesn’t change
their sense of balance gets better
their sense of balance gets worse
zero gravity
regular gravity
microgravity
it speeds up
it slows down
nothing, it stays the same
it swells with fluid before shrinking
eating
talking
walking
interacting
motion sickness
food poisoning
migraines
sleeping sickness
torso and head
legs and arms
stomach
lungs
muscles
legs
hands
brains