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A1 النواصري، حمدي السيد A2 حامد، حامد عبد الرؤف AB The study aimed to identify the effect of using Tabata exercises and taking L-Arginine supplement on some physiological and biochemical variables and the record Level of the 800-meter runners. The experimental method was used on the research sample of the contestants with outstanding level in the 800-meter running competition, who are registered in the Dakahlia region for athletics, season 2021, under 20 years, and the total number of members of the basic research sample reached (10) contestants, they were divided into Two equal groups, one experimental and the other a control group, each of (5) contestants, and the pilot study sample consisted of (4) contestants. Times for (4) minutes during the special physical preparation period of the training program for 800m runners for a period of (10) weeks, at the rate of (4) training units per week, and the time is (120) minutes, using the Tabata Time app on smart phones to regulate the time between performance and rest for the contestants separately, while the control group used traditional exercises, and The experimental group also took L-arginine tablets in doses of 3 grams per day at a rate of 1 gram per dose distributed as follows (a dose before eating breakfast, a dose half an hour before the training unit, and a dose before eating dinner), and the control group also took placebo tablets (dummy tablets), which are similar in The external shape and size of arginine tablets, but they contain only inactive carbohydrates, in order to avoid the psychological factor among the runners, after completing the training program, the post measurements were carried out and the data was processed statistically , and in light of the research objectives and hypotheses and the presentation and discussion of the results, the researcher concluded that using Tabata exercises and taking L-Arginine supplement had a positive impact on some biochemical and physiological variables and the record Level of the 800-meter runners. (Published abstract) http://search.shamaa.org/abstract_en.gif OP ص ص. 19-60 T1 تأثير استخدام تدريبات التاباتا Tabata وتناول مكمل الأرجنين L-Arginine على بعض المتغيرات الفسيولوجية والبيوكيميائية والمستوى الرقمي لمتسابقي 800 متر جري [مقال] UL http://search.shamaa.org/PDF/Articles/EGAoftr/AoftrVol59No1Y2021/aoftr_2021-v59-n1_019-060.pdf النص الكامل (PDF)‎ 1 http://search.shamaa.org/fulltext.gif