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