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