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