The researcher's wide knowledge and reading led him to think that the training of maximum strength development came by many methods, including muscles isotonic and isometric contraction trainings. In improving the maximum muscle strength and keeping it at its highest level. The researcher decided to discuss this topic, and the research aims to identify the effect of muscles isotonic and isometric contraction in developing maximum strength of the Marche and Romper skill of fencing players, , and the researcher used the experimental method to suit the nature and problem of the research and he used the appropriate means and tools for his research, then he conducted the exploratory experiments and the pretests and applied his exercises in the main experiment, then he conducted the post tests in the same conditions as the pre-tests and extracted the results using the statistical bag Spss, and through his research he concluded that it is possible to develop maximum strength using either of the two training methods (isotonic – i sometric).
Key words: Weights , Developing , Isometric, Muscular, Contraction , Maximum , Strength
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