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