بررسي رابطه دامنه حركتي مفاصل و زمان شناهاي 50، 100 و 200 متر قورباغه در پسران شناگر نخبه 13-12 ساله شركت كننده در مسابقات كشوري در سال 1395 شهر تهران: يك مطالعه توصيفي

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

زمينه و هدف: از آنجايي‌كه يافتن رابطه دامنه حركتي مفاصل و زمان شنا مهم است، لذا هدف مطالعه حاضر تعيين رابطه دامنه حركتي مفاصل و زمان 50، 100 و 200 متر قورباغه در پسران شناگر نخبه 13-12 ساله بود. مواد و روش­ ها: در اين مطالعه توصيفي، از 111 شناگر نخبه پسر 13-12 ساله، شركت كننده در مسابقات قهرماني كشور در سال 1395 شهر تهران، 31 نفر در 50 متر قورباغه، 29 نفر در 100 متر قورباغه و 23 نفر در 200 متر قورباغه انتخاب شدند. دامنه حركتي مفاصل براساس فرم Rydkov، اندازه­ گيري شد. براي بررسي رابطه متغيرها ضريب همبستگي Pearson استفاده شد. يافته ­ها: در شناي 50 متر قورباغه، باز شدن بيش از حد شانه با ركورد (r=-0.390, p=0.030) رابطه منفي معني­دار داشت. در شناي 100 متر قورباغه، دور شدن پنجه از ساق با ركورد(r=-0.384, p=0.040) رابطه منفي معني­دار داشت و در شناي 200 متر، خم شدن گردن به جلو با ركورد (r=-0.446, p=0.033) و باز شدن بيش از حد شانه با ركورد (r=-0.467, p=0.025); رابطه منفي معني­دار داشت؛ در حالي­كه خم شدن ران با ركورد (r=0.414, p=0.049) رابطه مثبت معني­دار داشت. بين 50، 100 و 200 متر قورباغه تفاوت معني­داري مشاهده نشد (0/05

Background and Objectives: 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. Materials and Methods: 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. Results: 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). Conclusion: 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 proper choice and substitution of talented swimmers and gain more success in reaching the peak of athletic performance.