Abstract: Vertical accelerating or decelerating motion may result in some physiological effects to humans. In this paper, the reactions to vestibulum of ear resulted from vertical accelerating or decelerating motion were analyzed. Then, the motions and the concept of “Hypergravity” and “Hypogravity” were described by taking the ascending and descending period of elevators as an example and using physics knowledge. At last, the physiological effects to cardiovascular system under the circumstances of “Hypergravity” and “Hypogravity ” were also analyzed.

Key words: vertical motion, hypergravity, hypogravity, vestibulum of ear, cardiovascular system