Preventive Physical Exercises.Vitamin D In Improving
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The purpose of this paper is to preparing preventive exercises supported by collagen
supplements and vitamin D for handball players, and identify the effect of preventive
physical exercises supported by collagen supplements and vitamin D on some physical and
skill abilities of handball players. The researchers used the experimental method and
designed two groups, one experimental and the other control, with both pre- and post-tests,
to suit the nature of the research. The research community was selected from handball
players (specialized school players), numbering (14), and they were divided into two
groups, each group numbering (7) players. One of the most important results reached by
the researcher is that: The exercises prepared by the r
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