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