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