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