نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه بیرجند عضو هیأت علمی دانشکده علوم ورزشی
2 دانشیار فیزیولوژی ورزشی، دانشکده علوم ورزشی، دانشگاه خوارزمی، تهران، ایران.
چکیده
زمینه و هدف: غوطه وری در آب سرد روشی برای بازگشت به حالت اولیه از مسابقه یا تمرین می باشد. اثربخشی کوتاه مدت غوطه وری بر بازگشت به حالت اولیه در مطالعات بسیاری بررسی شده و نتایج منفاوتی گزارش شده است؛ با این حال ابعاد سازش گونه آن تا حد زیادی مورد غفلت واقع شده است. بنابراین هدف پژوهش حاضر، بررسی اثرات غوطه وری در آب با دمای سرد و معتدل طولانی مدت پس از تمرین، بر سازگاری های تمرین مقاومتی می باشد. روش تحقیق: 32 موش صحرایی نر نژاد اسپراگ - داولی (8 هفته ای) به طور تصادفی به چهار گروه مساوی شامل کنترل (22/50±208/52 گرم)، تمرین مقاومتی (26/70±208/87 گرم)، تمرین مقاومتی و غوطه وری در آب با دمای ˚C 27 (208/37±16/30 گرم) و تمرین مقاومتی و غوطه وری در آب با دمای ˚C 14 (218/75±33/20 گرم) تقسیم شدند. تمرین به مدت 8 هفته، 3 روز در هفته، با 3 نوبت 5 تکراری بالا رفتن از نردبان اجرا شد و مقاومت از طریق اتصال کیسه محتوی وزنه به دم حیوان اعمال گردید. در انتهای هر جلسه، موشهای گروه 3 و 4 به ترتیب درون استخر آبی با دمای ˚C27 و ˚C14 به مدت 6 دقیقه قرار گرفتند. حداکثر قدرت بالا رفتن موش از نردبان در شروع و در جلسه آخر اندازه گیری شد. 24 ساعت پس از جلسه تمرینی آخر و پس از بی هوشی، عضله نعلی و خم کننده دراز انگشتان (FHL) موش ها برداشته و وزن شد. بافت چربی زیر جلدی شکمی- کشاله ای نیز به سرعت جدا و بلافاصله وزن شد. داده ها با استفاده از روش آنالیز واریانس یکطرفه و در سطح معنی داری 0/05>p مورد تجزیه و تحلیل قرار گرفت. یافته ها: نتایج نشان داد که میزان وزن چربی زیر جلدی - شکمی (0/01=p)، وزن نسبی عضلات نعلی و FHL (p=0/01) و حداکثر قدرت بالا رفتن از نردبان (0/001=p) در گروه ها بطور معنی داری از نظر آماری با یکدیگر متفاوت هستند؛ به گونه ای که در تمامی موارد، این شاخص ها در گروه تمرین مقاومتی و غوطهوری در آب معتدل، بهبودی بیشتری دارد. نتیجه گیری: غوطه وری در آب معتدل (با دمای ˚C27) می تواند بر سازگاریهای طولانی مدت تمرین مقاومتی در موش ها اثرگذار باشد؛ استفاده از این دما برای مداخلات غوطه وری ورزشکاران پیشنهاد می گردد.
کلیدواژه‌ها
عنوان مقاله [English]
Effect of moderate and cold-water immersion on strength and muscular weight changes following resistance training in Rats
نویسندگان [English]
- Mohsen Mohammadnia Ahmadi 1
- Hamid Rajabi 2
1
2 Associate Professor, Faculty of Sport Sciences, Kharazmi University, Tehran, Iran.
چکیده [English]
Background and Aim: Nowadays, cold-water immersion (CWI) has been established as a promising means to support recovery in high performance sports after highly intensive training bouts or competitions. There are many studies about effectiveness of acute CWI to support recovery after strenuous exercise, but the overall results seem to be conflicting. However, adaptational aspect has been widely neglected. Therefore, we analyzed the effects of immersion in cold and moderate water after resistance training on the some adaptations of strength training. Materials and Methods: In all, 32 male Sprague-Dawley rats (8-weeks) were assigned randomly into 4 equal groups including control (208.50±22.50 g), resistance training (208.87±26.70 g), resistance training + moderate water immersion (208.37±16.30 g.) and resistance training + cold water immersion (218.75±33.20 g) groups. The resistance training consisted of climbing (5 reps/3 sets) a ladder (120 cm) carrying load (equal to a percent of body weight) suspended from the tail. At last set (during 6 minute), rats in immersion water groups, immersed within container consisted water with 27˚C and 14˚C respectively. This process repeated 3 times a day during 8 weeks. At the first and last session, ladder climbing strength maximal was measured. Immediately after euthanasia (24 h after final training session), the flexor hallucis longus (FHL) and soleus muscles and subcutaneous-inguinal fat tissue was exposed and weighed. The data was analyzed with the one-way ANOWA method and significance level considered if pResults: Results showed that subcutaneous-inguinal fat (p=0.01), FHL and soleus weight (p=0.01) and maximal strength of ladder climbing (p=0.001) were significantly different in all studied group; so the best improvement was obvious at the resistance + moderate water immersion group. Conclusion: It is concluded that immersion in moderate water have a better impact on the strength training adaptations in rats.
کلیدواژه‌ها [English]
- Water immersion
- resistance training
- Muscle hypertrophy
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