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