پاسخ حاد شاخصهای پلاکتی به دو نوع انقباض همتنش و همجنبش درونگرایی در مردان سالم

طهماسبی, وریا; احمدی زاد, سجاد; هوانلو, فریبرز; اشرف جمشیدی, علی

doi:10.48308/joeppa.1391.98710

پاسخ حاد شاخصهای پلاکتی به دو نوع انقباض همتنش و همجنبش درونگرایی در مردان سالم

نوع مقاله : علمی - پژوهشی

نویسندگان

¹ دانشگاه شهید بهشتی

² دانشگاه علوم پزشکی تهران

10.48308/joeppa.1391.98710

چکیده

چکیدههدف: با توجه به اهمیت پاسخهای حاد شاخصهای پلاکتی به انواع انقباض عضلانی که پاسخ های هورمونی و الگوهای فعال سازی عصبی-عضلانیمتفاوتی نیز دارند، مطالعه حاضر جهت بررسی پاسخ حاد شاخصهای پلاکتی به انواع مختلف انقباضات درون گرای هم تنش و هم جنبش پس از26 سال) دو جلسه فعالیت مقاومتی هم تنش و هم جنبش /9±١/ فعالیت و دوره ریکاوری 1 ساعته طراحی شد. روش شناسی: ده مرد سالم ( ٧بر روی عضلات چهار سر هر دو پا را با استفاده از دستگاه بایودکس 4 (MVIT70 با شدت حدود 40 % حداکثر گشتاور ارادی ایزومتریک (5) در قبل، بلافاصله بعد و انتهای 1 ساعت ml) پیشرفته انجام دادند، که هر جلسه با یک ساعت ریکاوری همراه بود. نمونه های خون سیاهرگیپهنای ،(MPV) میانگین حجم پلاکتی ،(PLC-R%) درصد پلاکت های بزرگ ،(PLT) ریکاوری گرفته شد و برای اندازه گیری شمارش پلاکتیو غلظت لاکتات مورد استفاده قرار گرفت. تغییرات حجم پلاسما با استفاده از مقادیر هماتوکریت و هموگلوبین در انتهای (PDW) توزیع پلاکتیو PDW ، تصحیح شده PLT هر جلسه فعالیت محاسبه شد. نتایج: اگرچه هر دو جلسه حاد بدون در نظر گرفتن نوع انقباض با افزایش معنادارپس از فعالیت و در دوره %PLC-R . این افزایش موقتی بود و در انتهای ریکاوری به سطوح قبل از فعالیت بازگشت .(P< همراه بود ( 0.05 MPVبا در نظر گرفتن نوع انقباض تفاوت معناداری MPV و PLC-R ، تصحیح شده PLT افزایش .(P> ریکاوری تغییر معناداری نشان نداد ( 0.05نتیجه گیری: .(P< تصحیح نشده بودند که تغییرات آنها در پاسخ به نوع انقباض متفاوت بود ( 0.05 PLT و PDW و تنها (P> نشان نداد ( 0.05در مقایسه با فعالیت هم جنبش درون گرا همراه بود و نتایج نشان داد پس PDW و PLT در کل فعالیت درون گرای هم تنش با سطوح بالاتری ازاز فعالیت هم جنبش درون گرا در حجم تمرینی یکسان در مقایسه با انقباض هم تنش میزان افزایش برخی شاخص های مهم پلاکتی وترومبوسیتوزیز کمتر است.

کلیدواژه‌ها

عنوان مقاله [English]

Acute responses of platelet indices to concentric isotonic and isokinetic contractions in healthy men Abstract

چکیده [English]

Purpose: Because acute responses of platelet indices to different muscle contraction modes are importance and different muscle contraction models also have different hormonal and neuromuscular responses present study was designed to investigate the effects of different concentric isotonic and isokinetic contraction and th recovery (Ih-rec) periods on platelet indices. Methods: Ten healthy male subjects (26.9 ±1.7 years) completed two Isotonic and isokinetic contraction test trials with one week interval at an intensity corresponding to 40% of maximal voluntary isometric torque at 70 (MVIT 70) on two legs quadriceps muscle using Biodex Systems Pro 4 which was followed by th recovery. Venous blood samples (5 ml) were obtained before, immediately after exercise and at the end of recovery and were analyzed for platelet count (PLT), Large platelet count rate (PLC-R), mean platelet volume (MPV). platelet wide distribution (PDW) using cell counter Sysmex K-1000 and Lactate concentration using enzymatic methods. Plasma volume changes were estimated from hemoglobin and hematocrit readings before and after each exercise trial. Results: Although both exercise trials without considering type of contraction were followed by a significant increase in corrected PLT. PDW. and MPV (P<0.05). These increases were transient and decreased to pre- exercise level at the end of recovery. PLC-R after exercise and 1h-rec had no significant changes (P>0.05). There was no different between two type of contraction for corrected PLT. PLC-R and MPV (P>0.05) and only PDW and uncorrected PLT increases was different for two type of contraction (P<0.05). Conclusion: In general concentric isotonic exercise is followed by higher levels of PLT and PDW in comparison to concentric isokinetics exercise and results showed that after concentric isokinetic contraction with same training volume in comparison with isotonic contraction rate of some platlet incides increase and thrombocytosis is lower.

کلیدواژه‌ها [English]

platelet count
average platelet volume
platelet distribution width
resistance activity
Thrombosis

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