تاثیر کشش استاتیک و دینامیک بر پایداری دینامیک موضعی جابجایی زاویه ای مفاصل اندام تحتانی مردان فعال حین رکاب زدن

نویسندگان

1 استادیار، گروه بیومکانیک ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه خوارزمی

2 استاد تمام، گروه بیومکانیک ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه خوارزمی

3 استادیار، گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه خوارزمی

چکیده

مقدمه و اهداف
مطالعات گذشته در زمینه تاثیر کشش های استاتیک و دینامیک بر عملکرد متعاقب نتایج متناقضی ارائه داده اند. هدف این مطالعه بررسی تاثیر کشش استاتیک و دینامیک عضلات بر پایداری دینامیک موضعی جابجایی زاویه ای مفاصل اندام تحتانی مردان جوان سالم فعال در حین رکاب زدن  با استفاده از روشهای نوین تحلیل غیر خطی بود. مواد و روش­ها
تعداد 15 دانشجوی پسر تربیت بدنی و علوم ورزشی از دانشگاه خوارزمی به صورت داوطلبانه در این مطالعه شرکت کردند. آزمودنیها در طی دو روز با اختلاف 48 ساعت در هر مراجعه به آزمایشگاه مراجعه کردند و در حالتهای بدون کشش و پس از گذشت 2، 5 و 10 دقیقه از کشش استاتیک و دینامیک اطلاعات کینماتیکی اندام تحتانی آنها در 30 سیکل رکاب زدن دوچرخه ثابت در شدت کار 70 دور بر دقیقه توسط دوربین تحلیل حرکت با فرکانس 50 هرتز ثبت شد. اطلاعات جابجایی زاویه­ای مفاصل ران، زانو و مچ پا برای ساختن سری زمانی و محاسبه نمای لیاپانوف استخراج شدند.
یافته‌ها
نتایج آزمون تحلیل واریانس با اندازه گیری تکراری نشان داد که تفاوت معنی داری در نمای لیاپانوف جابجایی زاویه ای مفاصل ران، زانو و مچ پا در وهله های 2، 5 و 10 دقیقه بعد از کشش استاتیک و دینامیک وجود ندارد (05/0<P).
نتیجه‌گیری
با توجه به نتایج احتمالا می توان از هر دو نوع کشش استاتیک و دینامیک در برنامه گرم کردن پیش از رکاب زدن روی دوچرخه ثابت به منظور تمرین یا انجام بازتوانی استفاده کرد.

کلیدواژه‌ها

عنوان مقاله [English]

The Effects of Static and Dynamic Stretching on Local Dynamic Stability of Lower Extremity Joints’ Angular Displacement in Active Males during Cycling

نویسندگان [English]

  • Ali Abbasi 1
  • Heydar Sadeghi 2
  • Mehdi Zamanian 3
1 Assistant Professor, Sport Biomechanics Department, Faculty of Physical Education & Sport Sciences, Kharazmi University, Tehran, Iran
2 Full Professor, Sport Biomechanics Department, Faculty of Physical Education & Sport Sciences, Kharazmi University, Tehran, Iran
3 Assistant professor, Faculty of engineering, Kharazmi University, Kharazmi University, Karaj, Iran
چکیده [English]

Background and Aim: The previous studies on the effect of statics and dynamics stretching on forthcoming performance have reported various results. The purpose of the present study was to examine the effects of static and dynamic stretching types of muscles on local dynamic stability in angular displacement of the lower extremity joints in active males during cycling using innovative nonlinear analysis methods.
Materials and Methods: A total of 15 male university students of physical education and sport sciences at Kharazmi University voluntarily participated in the current study. Participants referred to the laboratory twice on two days seperated by a 48-hour interval, and the lower extremity kinematics data was collected from 30 pedaling cycles on the stationary cycle in 70 RPM in conditions of of without stretching, and 2, 5, and 10 minutes after stretching by means of motion analysis camera in 50 Hz frequency. The angular displacement of hip, knee, and ankle joints were extracted by constructing time series and Lyapunov Exponent (LyE) calculation.
Results: The results of repeated measure ANOVA did not show any significant differences in angular displacement LyE in hip, knee, and ankle joints 2, 5, and 10 minutes post stretching (P>0.05).
Conclusion: Considering the results, both static and dynamic stretching types can be used in warm up programs before pedaling on stationary cycle for the pruposes of training or rehabilitation.

کلیدواژه‌ها [English]

  • Static stretching
  • Dynamic stretching
  • local dynamic stability
  • Lyapunov exponent
  • cycling

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دوماهنامه علمی - پژوهشی طب توانبخشی
دوره 5، شماره 1
فروردین و اردیبهشت 1395
صفحه 145-155

فایل ها

سابقه مقاله

  • تاریخ دریافت: 10 تیر 1394
  • تاریخ بازنگری: 23 شهریور 1394
  • تاریخ پذیرش: 08 آذر 1394
  • تاریخ اولین انتشار: 01 فروردین 1395

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