Purpose. Core strength has been subject to research since the early 1980s. The research has highlighted the benefits of training these processes for people with back pain and for carrying out everyday activities. However, less research has been performed on the benefits of core training for elite athletes. Hence, the purpose of this study was to investigate the effects of two types of the core training (with sling and without sling) on Malondialdehyde (MDA), Creatine kinase (CK) as markers to lipid peroxidation, physical variables (core strength test, static strength and dynamic strength) and lunge speed for young fencers. Methods. Eighteen young fencers (mean ± SD age, 13.2 ± 1.9 years. High, 149.64 ± 6.31 cm. Weight, 47.22 ± 5.77 kg. Training experience 5.12 ± 2.05 years), all participations divided into equally into (3) groups (two experimental groups -12 young fencers) and (control group -6 young fencers) from the Alexandria fencing club, the first experimental group performed the core strength training with the sling which contain (Swiss ball and body weight exercises) for (10) weeks , the second experimental group performed the core strength training without sling which contain (Swiss ball and body weight exercises) for (10) weeks and the control group practiced the traditional training only. The data collected from urine and blood, and lunge speed test by using off camera 100 frames / second). Physical abilities tests (core strength test, static strength and dynamic strength) before and after the programs for the three groups. All participants were fully informed about the aims of the study, the procedures and the training, and gave their voluntary consent before participation. The experimental procedures were in agreement with the ethical human experimentation. Results. Statistical analyses showed that there was a significant difference between the two groups in the lung speed test only for the experimental group with the suspension. And there is no significant difference between the two experimental groups in biochemical & physical variables, the improvement in both. Conclusions. Finally, Core strength training, for 10 weeks, resulted in an increase in physical variables (core strength test, static strength and dynamic strength) and lung speed, and decreases the urine Malondialdehyde (MDA), and increased of Creatine kinase (CK) for young fencers .These results have to be taken into account by coaches in order to better understand and implicated of these concepts for technical effects of training.
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