تاثیر آنی گرم کردن با ارتعاش کل بدن بر دقت بازسازی نیروی عضلات اکستانسور زانو در افراد جوان سالم

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کمیته پژوهشی دانشجویان، دانشجوی کاشناسی ارشد فیزیوتراپی، دانشکده علوم توانبخشی، دانشگاه علوم پزشکی شهید بهشتی، تهران، ایران

2 استادیار گروه فیزیوتراپی، مرکز تحقیقات فیزیوتراپی و دانشکده علوم توانبخشی، دانشگاه علوم پزشکی شهید بهشتی، تهران، ایران

3 استاد گروه فیزیوتراپی، مرکز تحقیقات فیزیوتراپی و دانشکده علوم توانبخشی، دانشگاه علوم پزشکی شهید بهشتی، تهران، ایران

4 استاد آمار زیستی، گروه علوم پایه، دانشکده علوم توانبخشی، دانشگاه علوم پزشکی شهید بهشتی، تهران، ایران

چکیده

مقدمه و اهداف
امروزه از گرم کردن برای کاهش ریسک آسیب و افزایش عملکرد افراد قبل از انجام تمرین استفاده می شود. ارتعاش عمومی بدن یکی از روش های نوین گرم کردن محسوب می شود که به طور روز افزونی مورد توجه قرار گرفته است. علی رغم ازدیاد کاربرد این روش، اثرات ناشی از آن بر روی حس عمقی به خوبی مشخص نشده است. هدف از تحقیق حاضر بررسی اثرات آنی گرم کردن با ارتعاش عمومی بدن بر روی حس نیرو به عنوان شاخص مهمی از حس عمقی است.
مواد و روش ها
در این کارآزمایی بالینی کنترل شده 44 نفر (25 مرد و 19 زن) از دانشجویان سالم دانشکده توانبخشی علوم پزشکی شهید بهشتی به طور تصادفی در دو گروه ارتعاش عمومی بدن (فرکانس 30 هرتز و آمپلی تود 4 میلی متر) و گروه کنترل (دستگاه ارتعاش عمومی بدن خاموش) قرارگرفتند. نمونه ها در 5 دوره یک دقیقه ای با یک دقیقه استراحت بینشان بر روی دستگاه، اسکوات دینامیک انجام دادند و میزان خطای بازسازی نیرو عضلات اکستانسور زانو قبل و بعد از انجام مداخله مورد ارزیابی قرار گرفت. برای بررسی درک افراد از حس نیرویشان از خطای مطلق، متغیر و ثابت استفاده گردید.
یافته ها
میزان خطای مطلق و متغیر نیرو در هر دو گروه قبل و بعد از مداخله افزایش معناداری را نشان داد (0٫01P< و 009/0P=)، اما این افزایش خطا بین دو گروه تفاوت معناداری نداشت و میزان خطای ثابت نیرو قبل و بعد از مداخله در هر گروه و در بین گروه ها تفاوت معناداری را نشان نداد (0٫05P>).
نتیجه گیری
به نظر می‌رسد که اثرات آنی این روش گرم کردن سبب کاهش دقت حس نیرو می شود که می تواند به دلیل خستگی ناشی از انجام پنج دوره یک دقیقه ای اسکوات دینامیک و متعاقباً عدم تطابق مکانیسم های محیطی و مرکزی درک حس نیرو باشد و این امر باید در تجویز پروتکل مناسب گرم کردن مورد توجه قرار گیرد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Immediate Effect of Warm up by Whole Body Vibration on Accuracy of Force Reproduction of Knee Extensor Muscle in Young Healthy People

نویسندگان [English]

  • Javad Ahmadi 1
  • Sedigheh Sadat Naimi 2
  • Minoo Khalkhali Zavieh 2
  • Khosro Khademi Kalantari 3
  • Alireza Akbarzadeh Baghban 4
1 Student Research Committee, MSc student in Physical Therapy, Department of Physiotherapy, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2 Assistant Professor, Physiotherapy Research Center, Department of Physiotherapy, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3 Professor, Physiotherapy Research Center, Department of Physiotherapy, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4 Professor, Department of Basic Sciences, School of Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
چکیده [English]

Background and Aim: Warm up is used for reducing risk of injury and increasing performance prior to practice. Whole body vibration is one of the new methods of warm up that has increasingly been taken into consideration. Despite increased application of this method, its effect on proprioception is not well-known. The aim of the present study was to investigate the effects of whole body vibration on the accuracy of force reproduction as a key indicator of proprioception.
Materials and Methods: In the current randomized control trial, 44 participants (25 males and 19 females, with 22.02±2.75 years of age and BMI: 21.92 ± 2.33 kg/m2) selected from healthy students of Shahid Beheshti University of Medical Sciences, Tehran, were randomly assigned into two groups: whole body vibration (frequency of 30 Hz and amplitude of 4 mm) and control group (vibration plate inactivated). Participants performed dynamic squats in five minutes with one minute rest interval between each performance on the machine and accuracy of force reproduction of knee extensor muscle was evaluated before and after the intervention. The absolute error, constant error, and variable error were measured to evaluate the participants’ errors in their realization of force sense.
Results: Absolute error and variable error of force in both groups showed significant increase after intervention (P<0/01, P=0/009), but there were no significant difference between the two groups, and constant error of force showed no significant difference before and after intervention in each group and between the two groups (P>0/05).
Conclusion: According to the results, it seems that immediate effect of this method of warm up reduces accuracy of force production which can be due to fatigue caused by dynamic squat performed five times at one-minute which consequently led to incorrect matching between peripheral and central mechanisms of realization of the force sense. This point should be considered when prescribing the appropriate protocol of warm up.

کلیدواژه‌ها [English]

  • Warm up
  • Whole Body Vibration
  • Accuracy of force reproduction
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