Objective: Knee brace is one of the lower limb abnormalities. This study aimed to investigate the effect of knee kinematical parameters on the development of knee Genu Varum. Methods: This study’s statistical sample was 32 taekwondo practitioners with red and black belts of sports clubs in the northeast of Tehran, determined using G-Power software and in two groups of 16 people in terms of gender, age, and membership in the field. The 8-week training intervention, which included 3session of 1-hour training sessions emphasizing performing the techniques of up-chulogi and yup-chaggy, was performed for the experimental group. The control group did not have any specific activity during this period. Knee kinematic indices include naval drop size tests, tibial torsion, Q angle, androgen enterogen, internal and external hip rotation, and knee hyperextension in the two groups of healthy and injured in pre and posttest was evaluated. The data were statistically analyzed using descriptive analysis using t-test and SPSS V. 23 software. Results: According to the study results, a significant positive relationship was observed between the variables of the selected technique of up-chology and the technique of up-chugi on the incidence of knee Genu Varum. Also, there was a significant difference between the indices of naval drop (P=0.003), torsion (P=0.006), Q angle (P=0.005) and knee hyperextension (P=0.001) in pre-test to post-test results. Conclusion: The selected exercises have increased the distance between the knees and functional disorders. Because the braced knee may play a role in influencing athletes’ negative performance and injury in training and competition, it is necessary to consider it in studies related to the prevention of potential injuries.
Performing repetitive overhead movements puts stress on the shoulder joint, leading to uneven shoulders and pain in the shoulder joint. The purpose of this study was to evaluate and compare the strength and Range of Motion (ROM) of internal and external rotator muscles in volleyball players with and without uneven shoulders. Methods This is a descriptive and causal-comparative study conducted on 30 volleyball players randomly assigned into two groups of patients with uneven shoulders and healthy peers. A dynamometer (Manual muscle testing) was used to measure the strength of the rotator muscles at zero degrees, a goniometer to measure the ROM of muscles, and a scoliometer device to measure the symmetry of shoulders. Results There was a significant difference in the strength of internal (P=0.03) and external (P=0.02) rotator muscles between groups with and without uneven shoulders. The ROM of internal (P=0.02) and external (P=0.03) rotator muscles were also significantly different between the two groups. Conclusion High muscle strength in volleyball players with uneven shoulders is a risk factor. Limitations in the ROM of rotator muscles in the shoulder joint of these athletes showed the need for more attention to preventive approaches by creating corrective strategies.
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