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