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