AU - ناجي، زهاد فوزي AB - Through the presence of the researcher in the field and working in the student activities department being one of those interested and observing the physical education and sports sciences lesson, I noticed that the students have weakness in the elements of physical fitness in different proportions, which leads to a decrease in the level of physical performance and the physiological aspect as well, which gives a real indication of the physical effort on Organs of the body from the burden and effort exerted during the performance of the entire movement sequence for the effectiveness of 800 meters during the lesson required in the correct scientific preparation of students and relying only on the skillful performance, so the researcher decided to prepare physical exercises that have the basic role of increasing the activity and vitality of the body and helps the body to resist some of the difficulties that They are exposed to fatigue during the early preparation stage for students, and the research aims to identify exercises with tactical effort in developing some elements of physical fitness and physiological indicators for the effectiveness of 800 meters female students, and the researcher used the experimental method of pre and post testing for the experimental and control groups for its suitability to the nature of the research, and the research community was identified with the students of the stage The second evening study of the College of Physical Education and Sports Sciences, University of Baghdad for the academic year 2002-2019 of (20 female students), as the research sample was chosen by the method of comprehensive enumeration and the sample was divided into two experimental groups and the control group with (10 students) for each group. Exercises were applied with tactical effort on the experimental group for a period of eight weeks and by three Training units per week, and the researcher used the statistical bag (spss) to process the data, and the researcher reached the most important conclusions, which are an evolution between pre and post measurement in the impact of exercises with tactical effort in developing some elements of physical fitness and physiological indicators of the effectiveness of running 800 meters for the experimental group and for the benefit of the post measurement. (Published abstract) http://search.shamaa.org/abstract_en.gif OP - ص ص. 120-134 T1 - تأثير تمرينات بالجهد اللاكتيكي في تطوير بعض عناصر اللياقة البدنية والمؤشرات الفسيولوجية لفعالية ركض 800 متر طالبات [مقال] UL - http://search.shamaa.org/PDF/Articles/IQJssd/JssdVol12No42Y2020/jssd_2020-v12-n42_120-134.pdf النص الكامل (PDF) 1 http://search.shamaa.org/fulltext.gif