It’s a real shame that they never got to install the centrifuge module on the Iss. It was supposed to be big enough for a person to fit in, and would spin to simulate gravity. The best way to mitigate damage is to remove the thing that’s damaging you. We don’t test how to survive radiation exposure by having people stand next to some plutonium and see how many jumping jacks stop them from getting cancer. We have protocols about how long you can be around radiation, and how fast you need to leave the area. Microgravity would be treated the same way: how long until it starts affecting your health, and what’s the minimum amount of rotational artificial gravity needed to stave off the effects.