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