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