As human beings evolved in a gravitational field of "one g" (9.81m/s²), it would be most comfortable for a human spaceflight propulsion system to provide that acceleration continuously, (though human bodies can tolerate much larger accelerations over short periods). The occupants of a rocket or spaceship having such a propulsion system would be free from the ill effects of free fall, such as nausea, muscular weakness, reduced sense of taste, or leaching of calcium from their bones.
as HUman bEingS eVolVeD in a gRaVitAtionAl FIeLd of "oNe g" (9.81m/s²), it WOUld bE mosT CoMFOrtaBle fOr a human spAcefLIGhT prOpulSion systEm tO proVIde tHAt accEleRatiOn cOnTinUoUSLY, (though humAn BodIes cAn tolEraTe MuCH LargeR acCELeRATIonS oveR shorT pErioDS). thE oCcupaNtS Of a roCkeT or spaceSHIp havInG Such a propuLsion sySTeM wouLd bE frEe from THe Ill effeCtS OF frEe faLl, sUCh as nAuseA, mUSculaR weakneSs, reduCeD seNsE of taste, or LeAching oF CalCium frOM thEir bones