Liquid-filled habitats on high-G planets and on ships that accelerate quickly

So I want to send a ship to Alpha Centauri very quickly - by this, I mean less than 5 years. This means that the ship will have to accelerate at 50-100 $g$ or even more. But we don't want to turn our astronauts into pancakes, right?

Is spending long time periods in perfluorocarbons saturated with oxygen (or similar stuff) actually healthy or does it pose risks? What are the side effects? Does it neutralize the $g$-forces? How does it feel swimming or sitting in tanks filled with perfluorocarbons while your ship is accelerating at 1000 meters per square second?

Can this only be used on spaceships or can you use that in habitats on high-gravity planets too?

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Liquid-filled habitats on high-G planets and on ships that accelerate quickly

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