A first embodiment can be a method to reduce SLOSH energy absorption within an organism by reducing the inelastic collisions. A fluid containing organism can utilize an embodiment of the method wherein one or more of reversibly increasing pressure within the organs or cells, reversibly increasing the volume within the organs or cells, reversibly altering vascular, molecular, or cell wall stiffness, or reversibly altering vascular, molecular, or cell wall configuration within said organism may reduce these collisions.