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