مطالعات طب ورزشی

تأثیر ویبراسیون کل بدن بر مقاومت مکانیکی استخوان ران و درشت‌نی رت اوراکتومی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار بیومکانیک ورزشی، دانشگاه شهید بهشتی

2 استاد فیزیوتراپی، دانشگاه تربیت‌مدرس

3 استاد بیومکانیک ورزشی، دانشگاه بوعلی‌سینا

4 استاد فیزیولوژی ورزشی، دانشگاه بوعلی‌سینا

چکیده
هدفاینپژوهش،تعیینتأثیرویبراسیونبادامنةمختلفوفرکانسثابتبررویاستخوانران و درشت‌نیرتاوراکتومیبود. 23 سررتاوراکتومیدردوگروهتمرینی ویبراسیونبادامنةپایین (تعداد= نُه) ودامنةبالا   (تعداد= نُه) وگروه شم(تعداد= پنج) تقسیمشدند.شش سر رتسالمبدونجراحینیزدرگروهکنترلجایگرفتند. گروه‌هایتمرینیبه‌مدت هشت هفتهرویدستگاهویبراسیونبازمانپیش‌روندة سه تا پنج دقیقه، تناوبدو تا هفت بار تکراروزماناستراحت یک دقیقهقرارداده شدند. شاخص‌هایمقاومتمکانیکی سفتی، استرس،انرژیجذب‌شدهودرصدجابه‌جاییاستخوانران و درشت‌نی،باآزمونخمشسه‌نقطه‌ایپسازاتمامپروتکلویبراسیونکلبدنارزیابیشدند.شاخصمکانیکیسختی استخوانبینگروهتمرینی دامنه بالا (HA)) 024/0(P= و گروه تمرینی دامنه پایین (LA) (006/0(P=درمقایسهباگروهشم در استخوان ران و درشت نیافزایشمعناداری رانشانداد. شاخصاسترسبینگروهتمرینیHA  )000/0(P= و گروه تمرینی) LA 001/0(P=نسبت بهگروهشم، در استخوان درشت‌نیافزایشمعناداری رانشانداد. شاخص انرژی جذب‌شده فقط در گروه تمرینی) LA 006/0(P=باگروهشم در استخوان درشت نیافزایشمعناداری رانشانداد. افزایش معناداری بین گروه کنترل نسبت به گروه شم، در شاخص‌های ذکرشده نیز مشاهده شد )011/0P=، 000/0P=،014/0(P=. یافته‌هایاینپژوهشنشاندادکهویبراسیونبادامنةپاییناثر بیشتریبرافزایشمقاومتمکانیکیاستخوانداشتهاست؛ .همچنین، پاسخارتعاشاتمکانیکیبرپارامترهایمکانیکیاستخواندرشت‌نیبیشتربودهاست و ارتعاشات کل بدن توانسته است مقاومت مکانیکی استخوان را در شرایط اوراکتومی به سطح استخوان سالم نزدیک کند.

 

کلیدواژه‌ها

عنوان مقاله English

The Effect of Whole Body Vibration on the Mechanical Properties of the Femur and Tibia in Ovariectomized Rats

نویسندگان English

  • Hoda Mozayani 1
  • Giti Torkaman 2
  • Mehrdad Anbarian 3
  • Ali Heydarian-pour 4
1 Assistant Professor of Sport Biomechanics, Shahid Beheshti University
2 Professor of Physiotherapy, Tarbiat Modares University
3 Professor of Sport Biomechanics, Bu-Ali Sina University
4 Professor of Sport Physiology, Bu-Ali Sina University
چکیده English

The aim of this study was to determine the effect of whole-body vibration at a constant frequency and different amplitude in femur and tibia bones in ovariectomized rats. 23 ovariectomized rats divided into two exercise groups (n=9) and a SHAM group (n=5). Six healthy and non-surgical rats formed the control group. Rats in exercise and SHAM groups were placed on vibration platform for 8 weeks on the progressive time 2-5 minutes, 3-7 set and 1-minute inter-set rest time. Mechanical properties including stiffness, stress, and energy absorption and displacement percentage of the femoral and tibial were evaluated with three-point bending test after the period of the study. Stiffness index between training groups HA (P=0.024) and LA group (P=0.006) in femur and tibia compared with the sham group showed a significant increase. Stress index significantly increased between HA groups (P=0.000) and LA group (P=0.001) relative to the sham group in tibia. Energy absorb in just LA group (P=0.006) with the sham group showed a significant increase in tibia. Significantly increased control group compared to the sham was also observed in the indices (P=0.014, 0.000, 0.011) Our findings indicate a positive effect of whole-body vibration on the mechanical properties of the bone in both low and high amplitude conditions, but it was more effective in low-amplitude than high-amplitude condition. Also, whole-body vibration training is more effective to mechanical properties of tibia. Mechanical properties of bone in ovariectomized rats were close to control group level during whole body vibration.
 

کلیدواژه‌ها English

  • Bone Strength
  • Whole Body Vibration
  • Rats
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مطالعات طب ورزشی
دوره 10، شماره 23
شهریور 1397
صفحه 17-32

  • تاریخ دریافت 16 فروردین 1395
  • تاریخ بازنگری 09 بهمن 1395
  • تاریخ پذیرش 10 بهمن 1395

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