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