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