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