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The research aims to identify: the effect of anaerobic differential threshold exercises on some
physical and physiological variables, lactic acid in the blood, fatigue and muscle pain, for
volleyball players, the experimental method was used, the research sample was chosen by the
deliberate method The Of (9) players A Volleyball Players as a basic sample, and the results
showed the effect of training in the direction of the anaerobic differential threshold, which had a
positive effect on the physical variables under investigation, as statistically significant
differences were found between the pre and post measurements in favor of the post
measurement, and the training helped in the direction of the anaerobic differential threshold on
the speed of transporting lactate into and out of cells The different body, leading to a delay in
reaching muscle fatigue, and the exercises using the anaerobic differential threshold had a
positive effect on the physiological variables of the volleyball players under investigation, where
statistically significant differences were found between the pre and post measurements in favor
of the post measurement.
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