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