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