آثار مصرف صبحانه ایزوانرژتیک با شاخص گلیسمی بالا و پایین قبل از فعالیت تناوبی شدید بر هومئوستاز گلوکز و اکسیداسیون سوبسترا

قلیزاده, مهدی; رحمانی نیا, فرهاد; سیاه کوهیان, معرفت

doi:10.22124/jme.2017.3380

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

نویسندگان

¹ دانشجوی دکتری بیوشیمی و متابولیسم ورزشی

² استاد دانشگاه گیلان

³ استاد دانشگاه محقق اردبیلی

https://doi.org/10.22124/jme.2017.3380

چکیده

هدف: هدف از تحقیق حاضر بررسی آثار مصرف صبحانه ایزوانرژتیک با شاخص گلیسمی بالا و پایین بر هومئوستاز گلوکز و اکسیداسیون سوبسترا در طول فعالیت تناوبی شدید در مردان تمرین کرده میباشد
روش‌شناسی: 8 نفر از دانشجویان مرد رشته تربیت بدنی با سن 9/0± 4/23 سال، وزن 38/4±21/76 کیلوگرم، حداکثراکسیژن مصرفی 1/1 ± 7/53 میلی لیتر بر کیلوگرم بر دقیقه، در دو مرحله آزمایش با فاصله 7 روز و 60 دقیقه بعد از مصرف صبحانه ایزوانرژتیک(819 کیلوکالری)، فعالیت تناوبی شدید را روی چرخ کارسنج انجام دادند. نمونههای خونی برای بررسی گلوکز، انسولین وگلوکاگون پلاسما، جمعآوری و میزان اکسیداسیون چربی و کربوهیدرات در طول فعالیت از طریق معادلههای تنفسی ارزیابی شدند.
یافته‌ها: افزایش غلظت گلوکز پلاسما (از 86 به 127 میلی گرم بر دسی لیتر) در دوره پس از صرف غذا و افت ناگهانی غلظت گلوکز در اوایل فعالیت تناوبی شدید (به 79 میلی گرم بر دسی لیتر) در گروه شاخص گلیسمی بالا (HGI) نشان دادند؛ برعکس این، غلظت گلوکز در گروه شاخص گلیسمی پایین (LGI) به هنگام فعالیت، تقریبا در حالت پایدار با کمی افزایش باقی مانده است(86 به 89 میلی مول بر دسی لیتر)(05/0 P< ). ناحیه زیرمنحنی گلوکز و انسولین در گروه HGI به ترتیب (08/1درصد) و (37/1درصد) بیشتر از گروه LGI بوده و همچنین، در طول فعالیت مقدار اکسیداسیون چربی در گروه LGI بیشتر از گروه HGI بوده است (2/5 گرم به 3 گرم) (05/0 P<).
نتیجه‌گیری: : HGI موجب ایجاد هایپرگلیسمی و هایپرانسولینمی در دوره پس از صرف غذا شده و بیشتر بودن سطح انسولین در قبل از فعالیت، موجب افت ناگهانی گلوکز خون در طول فعالیت تناوبی شدید شده است؛ولی LGI به علت انسولینمی کمتر موجب حفظ بهتر گلوکز خون و هومئوستاز گلوکز و افزایش اکسیداسیون چربی در طول فعالیت تناوبی شدید شده است.
واژگان کلیدی: شاخص گلیسمی(GI)، هومئوستاز گلوکز، اکسیداسیون سوبسترا، فعالیت تناوبی شدید (HIIE).

کلیدواژه‌ها

عنوان مقاله [English]

Effects of high and low-glycemic index isoenergetic breakfast on glucose homeostasis and substrate oxidation during high intensity intermittent exercise

نویسندگان [English]

M Gholizadeh ¹
F Rahmani nia ²
M SiahKuhian ³

¹ Ph.D Student in Exercise Biochemistry and Metabolism

² Professor, University of Guilan

³ Professor, University of Mohaghegh Ardabili

چکیده [English]

Aim: Most studies have used moderate or low intensity endurance exercise to examine the effect of food intake with high and low glycemic index on metabolic responses and oxidation of substrates. However, the effect of glycemic index on high intensity intermittent exercise, which is a major characteristic of many sports, has not been studied. The purpose of the present study was to investigate the effect of high-glycemic (HGI) and low-glycemic (LGI)index isoenergetic breakfast on glucose homeostasis and substrate oxidation during high intensity intermittent exercise (HIIE).
Method: Eight male students with age 23.4 ± 0.9 years, weight 76/21± 4/38 kg, maximal oxygen uptake 53.7±1.0ml/kg/min, participated in two expermintal trials separated by 7 days. At each trial, 60 minutes after consumption isoenergitic breakfast (819 kcal), high intensity intermittent exercise (HIIE) was performed. Blood samples were evaluated for plasma glucose, insulin and glucagon, total fat and carbohydrate oxidation, evaluated by through respiratory equations.
Results: The results showed that in the postprandial period, increase in plasma glucose concentrations in HGI (from 86 to 127mg/dl) (P <0.05). In HGI, glucose concentration decreases rapidly in the early period of HIIE (to 79 mg/dl), but remains almost stable in LGI (P <0.05). AUG of glucose and insulin in HGI were higher (1.08%) than LGI (1.37%), respectively. The oxidation of fat during activity in LGI (2.5 g) was higher than that of HGI (3 g) (p <0.05).
Conclusion: HGI causes hyperglycemia and hyperinsulinemia in the postprandial period, and higher levels of insulin before exercise can lead to a sudden drop in blood glucose over the course of the activity, but LGI, due to lower insulinemia, helps to maintain better blood glucose and glucose homeostasis during HIIE.
Keywords: Glycemic Index (GI), Glucose homeostasis, Substrate Oxidation, High Intensity Intermittent Exercise (HIIE)

کلیدواژه‌ها [English]

Keywords: Glycemic Index (GI)
Glucose homeostasis
Substrate Oxidation
High Intensity Intermittent Exercise (HIIE)

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سوخت و ساز و فعالیت ورزشی

آثار مصرف صبحانه ایزوانرژتیک با شاخص گلیسمی بالا و پایین قبل از فعالیت تناوبی شدید بر هومئوستاز گلوکز و اکسیداسیون سوبسترا

مراجع

مراجع

دوره 7، شماره 2
آذر 1396
صفحه 136-154

آثار مصرف صبحانه ایزوانرژتیک با شاخص گلیسمی بالا و پایین قبل از فعالیت تناوبی شدید بر هومئوستاز گلوکز و اکسیداسیون سوبسترا

مراجع

مراجع

دوره 7، شماره 2آذر 1396صفحه 136-154

دوره 7، شماره 2
آذر 1396
صفحه 136-154