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