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