We all know the pictures of the astronauts on the ISS floating around. We also suspect that a lack of gravity is bad for the body as the muscles go weak and such.
Why don’t spaceships just rotate to cause the effect of artificial gravity through centrifugal forces?
It wouldn’t be enough. Sure you could use magnetic boots to keep you “attached,” to the outside of a magnetically affected spaceship’s outer hull, though I would imagine that with the lack of atmosphere and magnetic field to protect you from space radiation we may be inclined to use materials that aren’t necessarily magnetic in nature.
All that was to say, yes it would possibly work as a backup tether, but since nothing is pulling on the rest of your body it wouldn’t simulate gravity as much as simulate a tether rope that keeps you from floating away.
Inside the ship it is easier to pretend to be a parkour expert than having magnetic shoes.