نوع مقاله : مقاله پژوهشی Released under CC BY-NC 4.0 license I Open Access I
نویسندگان
1 دانشجوی کارشناسی‌ارشد فیزیولوژی ورزشی، واحد بروجرد، دانشگاه آزاد اسلامی، بروجرد، ایران
2 استادیار گروه تربیت بدنی، دانشکدۀ علوم انسانی، دانشگاه لرستان، خرم‌آباد، ایران
3 استادیار، گروه فیزیولوژی ورزش، دانشگاه آزاد اسلامی، ,واحد بروجرد، بروجرد، ایران
چکیده
هدف از پژوهش حاضر بررسی تغییرات اجرای حرکت پویا به‌دنبال توالی‌ای از اعمال پیشآمادگی متفاوت بود. دوازده آزمودنی زن سالم، فعال و غیرورزشکار (سن: 1±16سال، قد: 34/6±162 سانتیمتر، وزن: 21/9±60 کیلوگرم) داوطلبانه انتخاب شدند. آزمودنیها در دو پروتکل پیشآمادگی به فاصلۀ یک هفته شرکت کردند. پروتکل اول شامل اجرای 5 تکرار با 50 درصد و 2 تکرار با 75 درصد یک تکرار بیشینه حرکت اسکات و پروتکل دوم شامل اجرای 5 تکرار با 60 درصد و 2 تکرار با 90 درصد یک تکرار بیشینه جهت پیشآمادگی بود. آزمودنیها آزمونهای سارجنت و بوسکو 5، 15، 30 و 60 ثانیهای را انجام دادند. نتایج نشان داد پروتکل دوم در هر پنج آزمون تغییرات بیشتر و معناداری نسبت به پروتکل اول ایجاد کرد (01/0P<). درصد تغییرات یا اختلاف بین دو گروه به‌ترتیب در آزمون سارجنت (05/19)، پرش بوسکو 5 ثانیهای (20/15)، 15 ثانیهای (58/14)، 30 ثانیهای (37/11) و 60 ثانیهای (06/11) کمتر بود. به‌طور کلی می‌توان نتیجه گرفت احتمالاً در اجرای پروتکلهای پیشآمادگی هرچه شدت بیشتر باشد، اجرای پویای پیایند بهتر خواهد بود و به‌نظر میرسد اثر پروتکلهای پیشآمادگی با گذشت زمان کاهش مییابد.
کلیدواژه‌ها
عنوان مقاله [English]
Effect of two Different Preconditioning Protocols on Muscular Power Output
نویسندگان [English]
- Zeinab Veyspour 1
- Vahid Valipour Dehnou 2
- Ahmad Hematfar 3
1 MSc Student, Department of Exercise Physiology, Islamic Azad University, Boroujerd Branch, Boroujerd, Iran
2 Assistant Professor, Department of Physical Education and Sport Sciences, Faculty of Humanities, Lorestan University, Khorramabad, Iran
3 Assistant Professor, Department of Exercise Physiology, Islamic Azad University, Boroujerd Branch, Boroujerd, Iran
چکیده [English]
The ability to optimize muscular power output is considered as a basis for successful performance in the most sports. The aim of this study was to investigate changes in dynamic exercise performance following a sequence of preconditioning isometric muscle actions. Twelve nonathlete, active female volunteers (age: 16±1 yr, height: 162±6.34 cm, weight: 60±9.21 kg) participated in the present study. After the familiarization period (2 weeks), participants underwent one repetition maximum (1 RM) testing for the back squat exercise. Then, subjects participated in two preconditioning protocols at interval of 1 week. First protocol was included 15 minutes warm-up (jogging, active stretch, 5 repetitions back squat with %50 1RM and 2 repetitions back squat with %75 1RM) for preconditioning. Second protocol was included 15 minutes warm-up (jogging, active stretch, 4 repetitions back squat with %50 1RM, 1 repetition back squat with %75 1RM and 1 repetition back squat with %90 1RM) for preconditioning. After each protocol, subjects performed vertical jump, bosco 5, 15, 30 and 60 seconds tests. Paired-samples t-test and independent samples t-test were used to identify any significant differences and statistical significance was set at p< 0.05. Results: In all 5 tests, second protocol had better and significant (p< 0.01) results than first protocol. Percent changes were 19.05, 15.20, 14.58, 11.37 and 11.06 in vertical jump, bosco 5, 15, 30 and 60 seconds tests, respectively. Conclusion: possibly, in performing preconditioning protocols, the higher the intensity, the better the consequent dynamic performance and it seems that the effect of preconditioning protocols reduce over time.
کلیدواژه‌ها [English]
- sport performance
- postactivation potentiation
- anaerobic power
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