The research aims to identify a set of cardio karate exercises and to know their effect on some signs of stress and psychological security for orphan children and their relationship to their level of ambition. The two researchers used the experimental method, and the research sample included (12) children who were chosen intentionally from the age of (12-14) years in an institution. Education for boys in Zagazig. The two researchers used the ambition scale, the psychological security scale, and some physiological measurements used as indicators of stress. The most important results indicated the importance of using cardio karate training because of its positive impact on improving some indicators of stress, psychological security, and the level of ambition among orphan children residing in residential institutions.