Indentify the best Distances to Special Endurance Speed ACCORDING TO PLUS and It's Relation with Performance OF 400 M for Iraq Runners (age 14-16 years)

	Indentify the best Distances to Special Endurance Speed ACCORDING TO PLUS and It's Relation with Performance OF 400 M for Iraq Runners (age 14-16 years)
Modern Sport journal
Article 1, Volume 10, Issue 15, 2011, Pages 380-395
Abstract
400m one of the important races had a fertile field in physiology training endurance of speed occupied in important degree. Aim of the research to put the true scientific foundation when choose Distances to Special Endurance Speed ACCORDING TO PLUS. The problem it not use Indentify distances to measure special speed endurance repetition according pulse on training. The aim Indentify the batter Distances to Special Endurance Speed ACCORDING TO PLUS and It's Relation with Performance OF 400m. This research applicant on player (14 – 16) year. The period of specified between٦ / ٣ / 200٩to 28 / ٨ / 200٩in Iraq Cityes . The researcher reached at the following . 1. It is possible from dealing in scientific way according to athletic training science, exercise physiology, test and measurement, and experts to specify the best distance to measure tolerate speed endurance for short and middle distances. 2. It was confirm that the recommended distance is really good to measure that ability. The recommendations are: 1.Using these standard distances to train and develop speed endurance for these distances (400m). 2.Using this study on alit and women. 3. make another study on long distance and hurdle event.

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