en عمومى General پژوهشي Research <div style="text-align: justify;"><span style="font-size:14px;"><span style="font-family:Tahoma;"><strong>Purpose</strong>: This study was conducted to investigate the effect of 6 weeks of core stability exercises in the trunk area on lower limb alignment and lower and upper limb function in Kyokushin athletes.&nbsp;<br> <strong>Methods</strong>: The statistical sample of the research included 30 female Kyokushin players aged 14-18 years, who were randomly divided into two experimental and control groups. The control group performed common Kyokushin exercises and the experimental group performed core stability exercises for 6 weeks. Analysis of covariance (ANCOVA) and paired t-tests were used to compare between groups and within groups.&nbsp;<br> <strong>Results</strong>: The results of the paired t-test showed a significant effect of training programs on changes in upper and lower limb function in both experimental and control groups (P&le;0.05); however, a significant difference was observed between the pre-test and post-test in both control and experimental group. The test was not observed in the Q angle (P>0.05). The results of ANCOVA test showed that after controlling the effect of the pre-test, a significant difference was observed in lateral jump (P&le;0.05) between the experimental and control groups. However, no difference was observed between the two groups in the changes of closed kinetic chain upper extremity stability test (CKCUEST), square jump, and Q angle (P>0.05).<br> <strong>Conclusion</strong>: Considering the nature of Kyokushin and the research results, it is suggested that people working in Kyokushin do not feel the need for core stability exercises separately.</span></span></div> <span style="font-size:11pt"><span style="line-height:115%"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:"Times New Roman",serif"></span></span></span></span></span></span> Core stability, Function, Kyokushin-karate, Lower limp alignment, Q angle 95 104 http://ptj.uswr.ac.ir/browse.php?a_code=A-10-542-3&slc_lang=en&sid=1 Mohammad Rahimi mohammad.rahimi@sru.ac.ir 0000-0003-3810-8626 Yes Department of Corrective Exercises and Sport Injuries, Faculty of Sport Sciences, Shahid Rajaee Teacher Training University, Tehran, Iran. Hadi Samadi hadi.samadi@gmail.com 0000-0002-0618-2437 No Department of Corrective Exercises and Sport Injuries, Faculty of Sport Sciences, Shahid Rajaee Teacher Training University, Tehran, Iran. Afsane Rahnama afsanerahnama.ar@gmail.com 0000-0002-0535-660X No Department of Corrective Exercises and Sport Injuries, Faculty of Sport Sciences, Shahid Rajaee Teacher Training University, Tehran, Iran. Zohre Nikzade Abbasi karen.zk94@gmail.com 0000-0002-0535-660X No Department of Corrective Exercises and Sport Injuries, Faculty of Sport Sciences, Shahid Rajaee Teacher Training University, Tehran, Iran.