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