Rejeski, Walter J. Fitness motivation preventing participant dropout W. Jack Rejeski, Elizabeth A. Kenney. - Champaign, IL Life Enhancement Publications c1988. - xi, 155 p. ill. Includes indexes. Bibliography: p. 145-147. ISBN: LCCN: 88004584 Subjects--Topical Terms: Physical fitness--Psychological aspects.Aerobic exercisesMotivation (Psychology)