اثر سه دوره زمانی(10.5 و15 ثانیه) انقباض ایستا در روش PNF بردامنه کشش عضلات همسترینگ مردان غیر ورزشکار

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشگاه شهید بهشتی

2 دانشگاه آزاد اسلامی

چکیده

هدف تحقیق حاضر مقایسه اثر سه دوره زمانی 10،5و15 ثانیه انقباض ایستا در روش کششی انقباض آرام- برگشت- حفظ- استراحت (SRHR)بر کشش عضلات همسترینگ مردان غیر ورزشکار بود. روش تحقیق: به همین منظور تعداد 30مرد غیر ورزشکار با میانگین(سن :2/1 ± 20 سال قد:1/5 ±171 سانتیمتر و توده بدن: 6/3 ± 68 کیلو گرم) بصورت تصادفی در یکی از گروه های تجربی سه گانه به ترتیب با 10،5و15 ثانیه MVIC قرار گرفتند. اندازه گیری های دامنه کشش عضلات همسترینگ در پیش و پس آزمون، با استفاده از آزمون SLR و بوسیله گونیامتر اجرا گردید. برنامه های تمرین شامل اجرای یک نوبت با سه تکرار تمرین کششی(PNF- SRHR)در هر نوبت بود که حجم آن در پایان برنامه تمرین به سه نوبت با سه تکرار افزایش یافت. آزمودنی ها سه جلسه در هفته و به مدت 6 هفته تمرین کردند. پس از دوره تمرین ، مجددا از آزمودنی ها آزمون SLR بعمل آمد. در این تحقیق برای تجزیه و تحلیل داده ها از روش های آماری کلموگروف اسمیرنف t وابسته و تحلیل واریانس یک طرفه (ANOVA)استفاده شد. نتایج نشان داد اگر چه دامنه کشش عضلات همسترینگ در هر سه گروه به صورت معنی دار در پس آزمون نسبت به پیش آزمون افزایش یافته است. اما بین گروه ها تفاوت معنی داری مشاهده نشد. یعنی با طولانی تر شدن زمان MVIC افزایش بیشتری در انعطاف پذیری مشاهده نشد.

کلیدواژه‌ها


عنوان مقاله [English]

The effects of three time periods (5, 10 and 15 seconds) of isometric contraction in PNF method on range of hamstring stretch in non-athletes men

نویسندگان [English]

  • Khosro Ebrahim 1
  • Maryam Nourshahi 1
  • Abdolhossein Taheri 2
  • Mahmood Nikseresht 2
1
2
چکیده [English]

Purpose: The purpose of this study was to investigative the effects of three time periods of 5, 10,
and 15 seconds of maximum voluntary isometric contraction (MVIC) in the slow-reversal-holdrelax
stretching technique on hamstring flexibility in non-athletes men. Methods: Thirty nonathlete
men (Mean±SD; age, 20±2.1years; body mass, 68±6.3 kg; height, 171±5.1 cm) were
randomly assigned to one of the three training groups: 5s-MVIC, 10s-MVIC, and 15s-MVIC.
Measurements of hamstring stretch were performed at the beginning and at the end of six weeks of
training by researcher using a goniometer and SLR test. Training program included one set of
stretch training (SRHR-PNF) with three repetitions per set and three sessions per week for 6 week.
The training increased to three sets with three repetitions at the end of the program. At the end of
training period, rate of hamstring stretch was measured using SLR test. Data were analyzed using
dependent t-test and one-way ANOVA. Results: Data analysis showed significant increases in
hamstring flexibility for three groups. However, no significant difference between groups was
found (P0.05). Conclusions: according to the findings of the present study it could be concluded
that a longer MVIC time dose not lead to a greater increase in flexibility

کلیدواژه‌ها [English]

  • MVIC
  • PNF
  • SLR test
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  • تاریخ دریافت: 27 اردیبهشت 1394
  • تاریخ بازنگری: 05 خرداد 1403
  • تاریخ پذیرش: 11 دی 1399
  • تاریخ اولین انتشار: 11 دی 1399
  • تاریخ انتشار: 01 مرداد 1388