AU - جواد، بيداء رزاق AB - The aim of the research is to design a training program using circuit training for developing speed endurance ability and 400m running achievement. The subject were (10) young 400m runners from the national league. The training program was applied on the subject after conducting physiological and physical tests. The data was collected and treated using proper statistical operations. The researcher concluded that the training program had a clear effect on young 400m running achievement as well as there is a great development in achievement in favor of the subject understudy. Finally the researcher recommended the necessity of applying the program designed by the researcher as well as making similar studies on physiological variables. (Published abstract) http://search.shamaa.org/abstract_en.gif OP - ص ص. 347-364 T1 - تأثير تدريبات قدرة تحمل السرعة بالأسلوب الدائري في بعض المؤشرات الفسيولوجية وإنجاز ركض (400 م) حرة ناشئين [مقال] UL - https://www.iasj.net/iasj/article/156007 النص الكامل (PDF) 1 http://search.shamaa.org/fulltext.gif