پاسخ عوامل همورئولوژیکی به یک وهله فعالیت ورزشی شدید در زمان های مختلف روز

نوع مقاله : مقاله پژوهشی Released under (CC BY-NC 4.0) license I Open Access I

نویسندگان

1 گروه علوم ورزشی، دانشکده ادبیات و علوم انسانی، دانشگاه ولی عصر (عج) رفسنجان، رفسنجان، ایران

2 استاد فیزیولوژی ورزشی، دانشکده علوم ورزشی و تندرستی، دانشگاه شهید بهشتی، تهران، ایران

3 دانشیار فیزیولوژی ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه علامه طباطبائی، تهران، ایران.

چکیده

هدف: هدف از این مطالعه بررسی تأثیر فعالیت ورزشی در زمان­های مختلف روز بر متغیرهای همورئولوژیکی بود. روش شناسی: به همین منظور، 15 مرد سالم (میانگین± انحراف معیار: سن، 2.3±24.7 سال، وزن، 7.3±65.2 کیلوگرم، قد، 10.2±171.1 سانتی متر) به طور داوطلبانه در تحقیق حاضر شرکت کردند. همه آزمودنی­ها در چهار ساعت مختلف روز (08:00، 12:00، 16:00، 20:00) و به فاصله 3 روز یک پروتکل تمرین هوازی را بر روی چرخ کارسنج انجام دادند. در هر جلسه، آزمودنی­ها پس از گرم کردن، پروتکل دوچرخه سواری را به مدت 30 دقیقه با شدتی معادل 90 درصد HRmax انجام دادند. ضربان قلب و میزان درک فشار در طول 30 دقیقه تمرین ثبت شد. در هر کارآزمایی، دو نمونه خون وریدی (ml10) قبل و بلافاصله بعد از ورزش گرفته شد. نمونه‌های خون برای متغیرهای همورئولوژیکی (ویسکوزیته خون، ویسکوزیته پلاسما، هماتوکریت، فیبرینوژن، آلبومین و پروتئین تام) مورد بررسی قرار گرفتند. یافته­ها: نتایج نشان داد که زمان روز بر پاسخ ویسکوزیته خون (056/0=P)، ویسکوزیته پلاسما در گرادیان سرعت 12 (070/0=P)، هماتوکریت (152/0=P)، فیبرینوژن (078/0=P)، ، میزان رسوب گلبول قرمز (461/0=P) ضربان قلب (838/0=P) و میانگین فشار خون شریانی (581/0=P) اثر معنی‌داری نداشت. با این حال، زمان روز بر پاسخ‌ ویسکوزیته پلاسما (045/0=P، گرادیان سرعت 60)، پروتئین تام (014/0=P) و دمای بدن (035/0=P) به تمرین استقامتی تأثیر معنی­داری گذاشت. نتیجه‌گیری: با توجه به یافته‌های تحقیق حاضر می‌توان نتیجه گرفت که به جزء ویسکوزیته پلاسما در گرادیان بالا، پاسخ متغیرهای همورئولوژیک به یک جلسه فعالیت استقامتی وامانده ساز ارتباطی با زمان انجام فعالیت ورزشی ندارد. بنابراین به نظر می­رسد افراد سالم احتمالا می­توانند بدون نگرانی از وضعیت خونی خود در زمان­های مختلف روز به فعالیت ورزشی بپردازند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

The response of hemorheological factors to intense physical exercise at different times of the day

نویسندگان [English]

  • Iman Fathi 1
  • Sajad Ahmadizad 2
  • Minoo Basami 3
1 Assistant Professor, Department of Sport Sciences, Faculty of Literature and Humanities, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
2 Professor, Faculty of Sport Sciences and Health, Shahid Beheshti University, Tehran, Iran.
3 Associate Professor, Faculty of Physical Education and Sport Sciences, Allameh Tabataba'i University, Tehran, Iran.
چکیده [English]

Aim:   The purpose of this study was to investigate the effect of exercise at different times of day on hemorheological variables. Methods: For this reason, fifteen healthy male subjects (Mean±SD: age, 24.7±2.3 years, weight, 65.2±7.3 kg, height, 171.1±10.2 cm) participated in the present study voluntarily. All subjects performed an aerobic exercise protocol on a cycle ergometer at intervals of 3 days and at four different times of day (08:00, 12:00, 16:00 and, 20:00). In each session, subjects performed the cycling protocol for 30 minutes at an intensity corresponding to 90% of HRmax after warming up. Heart rate and rate of perceived exertion were recorded during 30 minutes of exercise. In each trial, two venous blood samples (10 ml) were taken before and immediately after exercise. Blood samples were analyzed for hemorheological variables (blood viscosity, plasma viscosity, hematocrit, fibrinogen, albumin and, total protein). Results: statistical analysis of data revealed no significant effect of time of day on responses of blood viscosity (P=0.056), plasma viscosity at a shear rate of 12 (P=0.070), hematocrit (P=0.152), fibrinogen (P=0.078), erythrocyte sedimentation rate (P=0.461), heart rate (P=0.838) and mean arterial blood pressure (P=0.581). However, time of day significantly affected responses of plasma viscosity (P=0.045, shear rate of 60), total protein (P=0.014), and body temperature (P=0.035) to endurance exercise. Conclusions: According to the findings of the present study, it could be concluded that except for plasma viscosity at the high shear rate, responses of hemorheological variables to exhaustive endurance exercise are not related to the time of day that exercise is performed.  Therefore, it seems that healthy people can probably exercise at different times of the day without worrying about their blood status.  

کلیدواژه‌ها [English]

  • Fibrinogen
  • Time of day
  • Hematocrit
  • Cardiovascular disease

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مطالعات کاربردی تندرستی در فیزیولوژی ورزش
دوره 10، شماره 1
فروردین 1402
صفحه 154-168

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  • تاریخ دریافت: 06 آذر 1401
  • تاریخ بازنگری: 19 اسفند 1401
  • تاریخ پذیرش: 19 اسفند 1401

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