The game of basketball (orange ball) is considered one of the fast and exciting games in the world. It is played by both sexes and different ages. It has Olympic and international championships and has various performance skills, including defensive ones. This game requires physical abilities that players must have for duties during matches, including special endurance that is compatible with... The peculiarity of the game is the changing rhythm and positions on the field. The importance of the research lies in the importance of special exercises to develop special endurance and its role in influencing the defensive skill performance of the players throughout the duration of the match.The problem of the research appeared in the decline in individual defensive skill performance, especially in the last period of the match, where the reason is due to the quality and quantity of special exercises given in the training units to develop special endurance .The research aims to prepare special exercises to develop special endurance, then determine the impact of their development on the individual defensive skill performance of players. The researchers used the experimental method and the one-group method on a sample aged (14-16) years, which deliberately tested (Al-Karkh Sports Club) from the research community, which consisted of (11) eleven clubs, with (12) twelve players for each club, with a total of (132) players, with a percentage of 10 %. The exploratory experiment and pre- and post-tests were conducted for the research variables. In addition to the main experiment, which lasted for (6) six weeks, with (3) three training units per week. The research continued from 12/6/2023 until 1/27/2024, in addition to statistical methods.The researchers concluded that the exercises developed led to the development of special endurance for players aged (14-16) years. Their effect was also proven in all variables of the research, as well as the emergence of differences in all variables of the research.The researchers recommend that trainers emphasize the importance of benefiting from special exercises after their impact on special endurance has been proven. They also emphasize diversifying special exercises according to the correct intensity and grading them in harmony with this age group, in addition to the necessity of allocating sufficient time during the training units for special endurance.
تهدف الدراسة الى تصميم اختبار لقياس سرعة ودقة الضربات الهجومية الامامية والخلفية للاعبي تنس الطاولة ومن خلال اطلاعنا للتعرف على كل ما هو جديد في رياضة تنس الطاولة ،اذ لم نجد دراسة او بحثا او وسيلة لقياس سرعة ودقة الضربات الهجومية الامامية والخلفية للاعبي تنس الطاولة في وقت واحد اذ لم نجد لها قياس لقدرة اللاعب مع تكيفات التدريب من حيث شدة وصعوبة الأداء ومشابهته لظروف وحالات اللعب المختلفة لضمان تقيمها
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هدف الدراسة: بناء مقياسي التفاؤل والتشاؤم للاعبي الكرة الطائرة المتقدمين للموسم الرياضي 2021-2022، وتحديد درجات ومستويات معيارية للمقياس. ولتحقيق اهداف الدراسة استخدم الباحثون المنهج الوصفي بالأسلوب المسحي كما حدد مجتمع الدراسة من لاعبي الدوري الممتاز للموسم 2021-2022 البالغ عددهم 104 لاعب يمثلون 13 فريق اما عينة الدراسة فقد اختار الباحثون المجتمع كله إذ قسمت العينة الى استطلاعية (10) وعينة بناء(44)، وعينة تقنين (50)
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Summary of the researchThe style of playing in basketball, represented by the performance of complex movements as a result of the rapid movement and changing positions is one of the advantages of this game, which adds beauty and excitement to this game, so it was necessary for players to use forms of mobility and complex skills mixed with precision and speed, In the attack to overcome the difficult positions defenders are trying to impose on the attacking team.Complex offensive skills in basketball are difficult skills that a player can not easily perform so they need to be specially trained to handle those situations so that the player can use them in difficult situations.The research community represented a sample of Baghdad players for t
... Show MoreCarrying strength is one of the important physical capabilities in the field of competitive sports, which affects the success of the sports training process and helps players to continue to perform skillfully, physically and tactically for as long as possible, and the capacity for endurance varies depending on the type of sports activities, it may sometimes be very short. And with a high level of intensity, such as gymnastics and wrestling movements, and it may be long, and with a medium level of intensity, as in basketball, football and other games. The research community represents a sample of Baghdad players for teams (football, basketball, handball, volleyball, wrestling, weightlifting) and for the sports season (2017-2018 AD) for ages
... Show Moreاستهل البحث مشكلته بدايةً من تشخيص الفجوة النظرية بين الطروحات الفكرية القائمة وصولاً الى إمكانية التطبيق، هادفاً التعرف على تأثير الادارة المرئية بأبعادها (الاظهار المرئي للمشكلات، استمرارية التواصل مع الواقع، تحديد الأهداف) في التسارع الاستراتيجي بأبعاده (وضوح الرؤيا، التركيز على الأهداف، التنفيذ) في الشركات النفطية العراقية. استند البحث في منهجه على وصف الظاهرة وتحليلها، مُختبراً فرضياتهِ في القط
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تكمن المقدمة وأهمية البحث في استخدام تمرينات (Decol) ومعرفة مدى تأثيرها في تطوير القوه العضلية والمرونة الخاصة لمهاره الدحرجة الأمامية فتحا" للطالبات ، كما وتطرق الباحث إلى مشكلة البحث وجدنا إن الكثير من الطالبات يواجهن صعوبة في أداء مهارات الجمناستك ، وتعتقد الباحثات إن السبب يرجع إلى ضعف في بعض القدرات الحركية والبدنية منها القوه العضلية والمرونة لذلك ارتات الباحثات في البحث عن هذه الحالة من اجل الوقوف
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We report here the observation of 16 µm superradiance laser action generated from optical pumping of CF4 gas molecules (which is cooled to 140 Kº by a boil-off liquid-N2) by a TEA-CO2 laser 9R12 line. Output laser pulses of 7 mJ and 200 ns have been obtained.
The main aims purpose of this study is to find the stabilizer groups of a cubic curves over a finite field of order 16, also studying the properties of their groups, and then constructing all different cubic curves, and known which one of them is complete or not. The arcs of degree 2 which are embedding into a cubic curves of even size have been constructed.
Three different rotational speeds (800, 1000 and 1250 rpm) and traverse speeds of (0.42 mm/sec) at a constant taped pin have been employed to produce the stir zones generated from friction stir processing (FSP) of near eutectic Al- 14 wt.% Si alloy. The processed samples were thoroughly analyzed macroscopically and microscopically. The as-cast microstructure of eutectic (α Al+ Si) and primary Si were fragmented to produce spheroidization of small size of Si and deformed matrix. The stir zones showed an increase in hardness from around 45-50 Hv for as-cast to 40-65 depending on the variables applied. All the processed samples were characterized by advanced and retreated regions with large single piping defects formed m
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