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