Yep, exactly that, or similar. Use gravity to pull blood towards the head. It's not rocket science, although if you want to do that on space, you may need to le

Yep, exactly that, or similar. Use gravity to pull blood towards the head. It's not rocket science, although if you want to do that on space, you may need to learn a little bit of rocket science. In space that's the default situation. The heart pulses maniacally to keep blood circulating all around, but in no gravity places the legs are a pretty small organ, they don't need that much blood. So in space, a lot of blood ends up on the head. We can simulate that on earth for half an hour/day and it has numerous benefits.