Most organic crews would suffer serious health problems aboard starships accelerating at ten G’s or higher. Fast yachts and corvettes accelerating at 15-20 G’s could prove lethal, and fighters and racing ships accelerating at hundreds of G’s would instantly kill their pilots.
For this reason, organic races make use of inertial dampening technology, designed to prevent crew members from being affected by high G maneuvers at sublight, or FTL travel. Ships use an Alcubierre drive, an advanced device that uses exotic matter, such as dark matter, Bose-Einstein Condensate, or Quark-Gluon Plasma, to create a negative mass bubble around the ship, allowing it to counteract the insane G-forces that would normally affect the vessel at high accelerations.