fa بررسی رابطه دامنه حرکتی مفاصل و زمان شناهای 50، 100 و 200 متر قورباغه در پسران شناگر نخبه 13-12 ساله شرکت کننده در مسابقات کشوری در سال 1395 شهر تهران: یک مطالعه توصیفی تربيت بدني تربيت بدني پژوهشي Research <strong><span style="font-family:b nazanin;"><span style="font-size:12.0pt;">چکیده</span></span></strong><strong><span style="font-family:b nazanin;"><span style="font-size:12.0pt;"></span></span></strong><br> <strong><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">زمینه و هدف: </span></span></strong><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">از آنجایی‌که یافتن رابطه دامنه حرکتی مفاصل و زمان شنا مهم است، لذا هدف مطالعه حاضر تعیین رابطه دامنه حرکتی مفاصل و زمان 50، 100 و 200 متر قورباغه در پسران شناگر نخبه 13-12 ساله بود. </span></span><br> <strong><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">مواد و روش&shy;ها:</span></span></strong><span style="font-family:b nazanin;"><span style="font-size:12.5pt;"> در این مطالعه توصیفی، از </span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">111 </span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">شناگر</span></span> <span style="font-family:b nazanin;"><span style="font-size:12.5pt;">نخبه</span></span> <span style="font-family:b nazanin;"><span style="font-size:12.5pt;">پسر</span></span> <span style="font-family:b nazanin;"><span style="font-size:12.5pt;">13-12 ساله، شرکت کننده در مسابقات قهرمانی کشور در سال 1395 شهر تهران، </span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">31 نفر در 50 متر قورباغه، 29 نفر در 100 متر قورباغه و 23 نفر در 200 متر قورباغه انتخاب شدن</span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">د. </span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">دامنه حرکتی مفاصل</span></span> <span style="font-family:b nazanin;"><span style="font-size:12.5pt;">براساس</span></span> <span style="font-family:b nazanin;"><span style="font-size:12.5pt;">فرم </span></span><span dir="LTR"><span style="font-family:bnazanin;"><span style="font-size:10.5pt;">&nbsp;Rydkov</span></span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">، اندازه&shy;گیری</span></span> <span style="font-family:b nazanin;"><span style="font-size:12.5pt;">شد</span></span><span dir="LTR"><span style="font-family:b nazanin;"><span style="font-size:10.5pt;">.</span></span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;"> برای بررسی رابطه متغیرها </span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">ضریب همبستگی </span></span><span dir="LTR"><span style="font-family:bnazanin;"><span style="font-size:10.5pt;">Pearson</span></span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;"> استفاده شد. </span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;"></span></span><br> <strong><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">یافته&shy;ها:</span></span></strong><span style="font-family:b nazanin;"><span style="font-size:12.5pt;"> در شنای 50 متر قورباغه، باز شدن بیش از حد شانه با رکورد (390/0-=</span></span><span dir="LTR"><span style="font-family:times new roman,serif;"><span style="font-size:10.5pt;">r</span></span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">، 030/0=</span></span><span dir="LTR"><span style="font-family:times new roman,serif;"><span style="font-size:10.5pt;">P</span></span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">) رابطه منفی معنی&shy;دار داشت. در</span></span> <span style="font-family:b nazanin;"><span style="font-size:12.5pt;">شنای 100 متر قورباغه، دور شدن پنجه از ساق با رکورد (384/0-=</span></span><span dir="LTR"><span style="font-family:times new roman,serif;"><span style="font-size:10.5pt;">r</span></span></span><span style="font-family:times new roman,serif;"><span style="font-size:12.5pt;">، </span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">040/0=</span></span><span dir="LTR"><span style="font-family:times new roman,serif;"><span style="font-size:10.5pt;">P</span></span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">) رابطه منفی معنی&shy;دار داشت و در شنای 200 متر، خم شدن گردن به جلو با رکورد (446/0-=</span></span><span dir="LTR"><span style="font-family:times new roman,serif;"><span style="font-size:10.5pt;">r</span></span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">، 033/0=</span></span><span dir="LTR"><span style="font-family:times new roman,serif;"><span style="font-size:10.5pt;">P</span></span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">) و باز شدن بیش از حد شانه با رکورد (467/0-=</span></span><span dir="LTR"><span style="font-family:times new roman,serif;"><span style="font-size:10.5pt;">r</span></span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">، 025/0=</span></span><span dir="LTR"><span style="font-family:times new roman,serif;"><span style="font-size:10.5pt;">P</span></span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">) رابطه منفی معنی&shy;دار داشت؛ در حالی&shy;که خم شدن ران با رکورد (414/0=</span></span><span dir="LTR"><span style="font-family:times new roman,serif;"><span style="font-size:10.5pt;">r</span></span></span><span style="font-family:times new roman,serif;"><span style="font-size:12.5pt;">،</span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;"> 049/0=</span></span><span dir="LTR"><span style="font-family:times new roman,serif;"><span style="font-size:10.5pt;">P</span></span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">) رابطه مثبت معنی&shy;دار داشت. بین 50، 100 و 200 متر قورباغه تفاوت معنی&shy;داری مشاهده نشد (05/0</span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;"><</span></span><span dir="LTR"><span style="font-family:times new roman,serif;"><span style="font-size:10.5pt;">P</span></span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">)</span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">. </span></span><br> <span style="font-family:b nazanin;"><span style="font-size:12.5pt;">&nbsp;<strong>نتیجه&shy;گیری:</strong> تحقیق حاضر نشان داد بین دامنه حرکتی مفاصل و زمان 50، 100 و 200متر قورباغه رابطه معنی&shy;دار وجود دارد. لذا، پیشنهاد می&shy;شود که مربیان هنگام انتخاب شناگران نوجوان به نتایج مطالعات در این زمینه توجه کنند، تا با انتخاب و جایگزینی مناسب شناگران مستعد، در وقت و هزینه صرفه&shy;جویی کنند و موفقیت بیش</span></span><span dir="LTR"><span style="font-family:times new roman,serif;"><span style="font-size:10.5pt;">‌</span></span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">تری در رسیدن به اوج عملکرد ورزشی کسب کنند.</span></span><br> <strong><span style="font-family:b nazanin;"><span style="font-size:12.5pt;">واژه‌های کلیدی:</span></span></strong><span style="font-family:b nazanin;"><span style="font-size:12.5pt;"> دامنه حرکتی مفاصل، زمان عملکرد، شنای قورباغه، پسران، شناگر نخبه</span></span><span style="font-family:b nazanin;"><span style="font-size:12.5pt;"></span></span> <pre> <strong>Background and Objectives:</strong> Finding the relationship between the joints range of motion and swimming time is important, so the aim of the present study was to investigate the relationship between the joints range of motion and time of 50, 100 and 200m breaststroke swimming in 12-13 years elite swimmer boys. </pre> <pre> <strong>Materials and Methods: </strong>In this descriptive study, subjects were selected from 111 elite swimmers, 12-13 years old, participated in the national championship of the country selection in 2016 in Tehran, 31 participants in 50m breaststroke, 29 participants in 100m breaststroke and 23 participants in 200m breaststroke. Joints range of motion was measured by Rydkov questionnaires. Pearson᾽s correlation coefficient was used to examine the relationship between the variables. </pre> <strong>Results: </strong>There was a significant negative relationship between shoulder hyperextension and time (r=-0.390, p=0.030) in 50m breaststroke. There was a significant negative relationship between ankle plantar flexion and time (r=-0.384, p=0.040) in 100m breaststroke. There were significant negative relationships between neck flexion and time (r=-0.446, p=0.033) and shoulder hyperextension and time (r=-0.467, p=0.025); whereas there was a significant positive relationship between hip flexion and time (r=0.414, p=0.049) in 200m breaststroke. There was no significant difference between 50, 100 and 200m breaststroke swimming (p>0.05).<br> <strong>Conclusion: </strong>The results showed that there was a significant relationship between the joints range of motion and 50, 100 and 200m breaststroke time. So, it is recommended that coaches pay attention to the studies in this field for choosing swimmers at the early teens to save time and money through &nbsp;proper choice and substitution of talented swimmers and gain more success in reaching the peak of athletic performance.<br> &nbsp;<br> <strong>Key words</strong>: Joints range of motion, Performance time, Breaststroke swimming, Boys, Elite Swimmer<br> <strong>Funding:</strong> This study did not have any funds.<br> <strong>Conflict of interest:</strong> None declared.<br> <strong>Ethical approval:</strong> The Ethics Committee of the Sport Sciences Research Institute of IRAN (IR.SSRI.REC.1397.353) has approved this protocol. <span dir="RTL"></span><br> &nbsp;<br> <strong>How to cite this article</strong>: PourRahim Ghouroghchi A, Pahlevani M. The Investigation of Relationship Between the Joints Range of Motion and Time of 50, 100 and 200m Breaststroke Swimming in 12-13 Years Elite Swimmer Boys Participated in the National Championship of the Country Selection in 2016 in Tehran. <em>J Rafsanjan</em> <em>Univ Med Sci</em> 2019; 18 (2): 161-76 [Farsi]<br> &nbsp; دامنه حرکتی مفاصل, زمان عملکرد, شنای قورباغه, پسران, شناگر نخبه Joints range of motion, Performance time, Breaststroke swimming, Boys, Elite Swimmer 161 176 http://journal.rums.ac.ir/browse.php?a_code=A-10-3759-1&slc_lang=fa&sid=1 A. PourRahim Ghouroghchi آمنه پوررحیم قورقچی amenehpoorrahim@yahoo.com 6900319475328460033545 6900319475328460033545 Yes Professor Assistant, Department of Sport Physiology, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran. استادیار گروه فیزیولوژی ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه محقق اردبیلی، اردبیل، ایران. M. Pahlevani مهدی پهلوانی 6900319475328460033546 6900319475328460033546 No MSc in sport biomechanics, Department of Sport Science, Islamic Azad University, Sarab Branch, Sarab, Iran. کارشناس ارشد بیومکانیک ورزشی گروه تربیت بدنی و علوم ورزشی، دانشگاه آزاد اسلامی واحد سراب، سراب، ایران.