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