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