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