تاثیر یک وهله خستگی عمومی بر میزان هماهنگی و تغییرپذیری بین مفاصل ناحیۀ تنه قایقرانان نخبه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری بیومکانیک ورزشی، دانشکده تربیت ‌بدنی و علوم ورزشی دانشگاه آزاد تهران مرکزی، تهران، ایران

2 استاد تمام بیومکانیک ورزشی، گروه بیومکانیک و آسیب شناسی ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه خوارزمی، تهران، ایران.

3 استادیار بیومکانیک ورزشی، دانشگاه فرهنگیان، تهران، ایران

4 استادیار، دانشکده تربیت بدنی و علوم ورزشی دانشگاه آزاد تهران مرکزی، تهران، ایران

چکیده

مقدمه و اهداف
هماهنگی بین مفاصل و عضلات سبب اعمال و پخش مناسب نیرو بر ستون فقرات کمری و مفاصل می­شود. از طرفی دیگر، خستگی ناشی از قایقرانی که با تغییراتی در مکانیک پارو زدن نیز همراه است، به­دلیل چرخه­ای و تکراری بودن موجب تغییراتی در الگوی هماهنگی و تغییرپذیری مفاصل می ­شود. هدف تحقیق حاضر تعیین اثر یک وهله خستگی عمومی بر میزان هماهنگی و تغییرپذیری بین مفاصل ناحیۀ تنه (ناحیۀ کمری-پشتی ستون فقرات و ران-لگن) قایقرانان نخبه بود.
مواد و روش ها
14 قایقران تیم ملی مردان در تحقیق کنونی نیمه ­آزمایشگاهی شرکت کردند. برای ایجاد خستگی عمومی ناشی از فعالیت تا حد واماندگی از تمرین قایقرانی روی ارگومتر استفاده شد. متغیرهای مرتبط با هماهنگی و تغییرپذیری بین مفاصل با استفاده از دستگاه واحدهای اندازه‌گیری اینرسی و مشخصات کینماتیکی حرکت در سه صفحۀ ساجیتال، فرونتال و هوریزنتال محاسبه شد. از آزمون شاپیرو-ویلک برای تعیین وضعیت نرمال بودن توزیع داده ­ها و از آزمون آماری تی وابسته برای مقایسه متغیرهای وابسته در سطح معنا­داری P≤0/05  استفاده شد.
یافته­ ها
نتایج نشان داد که یک وهله خستگی عمومی تغییر معنا­داری بر میزان تغییرپذیری مفاصل ران-لگن در صفحۀ ساجیتال (0/009=P با اندازه اثر 0/933) دارد. یک وهله خستگی عمومی تغییر معنا­داری بر میزان هماهنگی مفاصل کمری-پشتی و ران-لگن در صفحات ساجیتال، فرونتال و هوریزانتال ایجاد نمی‌کند (0/05>P). همچنین تغییر معنا­داری بر میزان تغییرپذیری مفاصل کمری-پشتی در صفحات ساجیتال، فرونتال و هوریزانتال و مفاصل ران-لگن در صفحات فرونتال و هوریزانتال قایقرانان نخبه ایجاد نمی‌کند (0/05>P).
نتیجه­ گیری
با توجه به نتایج به­ دست ­آمده، می­توان افزایش تغییرپذیری مفاصل ناحیه تنه را به­عنوان ریسک ­فاکتوری بر عملکرد قایقرانان حرفه­ای قلمداد کرد که پتانسیل بروز آسیب ­های مختلفی همچون کمردرد در بین ورزشکاران این رشته ورزشی را موجب می­شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effects of One Stage of Exhaustive Global Fatigue on Coordination and Variability of the Joints of the Trunk in Elite Rowers

نویسندگان [English]

  • Azam Daneshvar 1
  • Heydar Sadeghi 2
  • Zohre Borhani Kakhki 3
  • Mehdi Taghva 4
1 PhD Candidate in Sports Biomechanics, Faculty of Sports Sciences and Physical Education, Central branch of Azad University, Tehran, Iran
2 Full Professor of Sport Biomechanics, Department of Sport Biomechanics and Sport Injuries, Faculty of Physical Education and Sport Science, Kharazmi University, Tehran, Iran. Full Professor of Sport Biomechanics, Research Institute
3 Assistant Professor of Sport Biomechanics, Farhangian University, Tehran, Iran.
4 Assistant Professor, Faculty of Sports Sciences and Physical Education, Central branch of Azad University, Tehran, Iran
چکیده [English]

Background and Aims: The coordination between joints and muscles cause suitable production and distribution of force on the lumbar spine and joints. Fatigue induced by rowing, which is also associated with changes in paddling mechanics, can cause changes in coordination and variability patterns of segments due to its cyclic and periodic nature. The main objective of the present study was to investigate the effects of one stage of exhaustive global fatigue on coordination and coordination variability of the joints of the trunk in elite rowers
Materials and Methods: A total of 14 male rowers of the national team participated in current quasi-experimental study. Participants were tested during a rowing exercise on a Concept 2 ergometer performed until task failure. The variables of the coordination and variability between the joints were recorded using the inertial measurement unit device and the kinematic data of motion were calculated in sagittal, frontal, and horizontal planes. Shapiro-Wilk test was used to ensure the normal distribution of data. Paired t-test was run to compare variables at p≤0.05 level.
Results: The results showed a significant difference in the effects of one stage of exhaustive global fatigue on coordination variability of the joints (hip- lumbar) in sagittal planes (P=0.009 of effect size 0.93). There were no significant differences in the effects of one stage of exhaustive global fatigue on coordination variability of the joints (thoracic-lumbar and hip- lumbar) in the sagittal, frontal, and horizontal plates (p≤0.05). Moreover, no significant differences were observed for coordination variability of the thoracic-lumbar joints in the sagittal, frontal, and horizontal plates and hip-lumbar joints in the frontal and horizontal plates (p≤0.05).
Conclusion: Overall, it seems that increased trunk joint variability observed in the present study can have negative effects on the performance of professional rowers and increases the risk of various injuries, such as low back pain.

کلیدواژه‌ها [English]

  • Rowing
  • Fatigue
  • Coordination
  • Variability
  • Trunk

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دوماهنامه علمی - پژوهشی طب توانبخشی
دوره 10، شماره 1
فروردین و اردیبهشت 1400
صفحه 158-167

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سابقه مقاله

  • تاریخ دریافت: 22 فروردین 1399
  • تاریخ بازنگری: 17 خرداد 1399
  • تاریخ پذیرش: 18 خرداد 1399
  • تاریخ اولین انتشار: 01 فروردین 1400

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