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