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