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