بررسي اثر فعاليت ورزشي هوازي بر سيستم عصبي خودكار قلبي با استفاده از روش ژئومتريكي Poincare plot

The Effect of Aerobic Exercise on Cardiac Autonomic Nervous System Using Poincare's Geometric Method

ﺳﺎﺑﻘﻪ و ﻫﺪف: روش ژﺋﻮﻣﺘﺮﯾﮑﯽ دﯾﻨﺎﻣﯿﮏ ﻏ ﯿﺮﺧﻄﯽ ﺑﺮرﺳﯽ ﺗﻐﯿﯿﺮﭘﺬﯾﺮي ﺿﺮﺑﺎن ﻗﻠﺐ ﻧﺴﺒﺖ ﺑﻪ روشﻫﺎي ﺧﻄﯽ از ﻗﺒﯿﻞ روش زﻣﺎن ﻣﺤﻮر و ﻓﺮﮐﺎﻧﺲ ﻣﺤﻮر ﺗﻐﯿﯿﺮﭘﺬﯾﺮي ﺿﺮﺑﺎن ﻗﻠﺐ اﻃﻼﻋﺎت ارزﺷﻤﻨﺪي از ﺳﺎﺧﺘﺎر ﭘﺎﺳﺦ ﭘﺬﯾﺮي ﺳﯿﺴﺘﻢ اﺗﻮﻧﻮم ﻗﻠﺒﯽ اراﺋﻪ ﻣﯽﻧﻤﺎﯾﺪ. ﻫﺪف از اﯾﻦ ﭘﮋوﻫﺶ، ﺑﺮرﺳﯽ اﺛﺮ ﯾﮏ دوره ﻣﺘﻮاﻟﯽ ﻓﻌﺎﻟﯿﺖ ورزﺷﯽ ﻫﻮازي ﺑﺮ ﺗﻐﯿﯿﺮﭘﺬﯾﺮي ﺿﺮﺑﺎن ﻗﻠﺐ ﺑﺎ اﺳﺘﻔﺎده از روش ﻏﯿﺮﺧﻄﯽ اﺣﺘﻤﺎل ﺗﮑﺮار ﺗﻮاﻟﯽ ﻫﺎي ﻫﻢ ﺷﮑﻞ در ﻣﺮدان ﺟﻮان داﻧﺸﮕﺎﻫﯽ ﻣﯽﺑﺎﺷﺪ. ﻣﻮاد و روشﻫﺎ:28 ﻣﺮد ﺟﻮان داﻧﺸﮕﺎﻫﯽ ﺑﻪ ﻃﻮر ﺗﺼﺎدﻓﯽ در ﮔﺮوه ﻫﺎي ﭘﮋوﻫﺶ) ﮔﺮوه ﮐﻨﺘﺮل؛ ﮔﺮوه ﺗﻤﺮﯾﻦ ﻫﻮازي( ﺗﻘﺴﯿﻢﺑﻨﺪي ﮔﺮدﯾﺪﻧﺪ. در دوره ﭘﯿﺶ آزﻣﻮن و ﺑﻌﺪ از ﻣﺪاﺧﻠﻪ ﺗﻤﺮﯾﻦ ﻫﻮازي، ﺗﻤﺎﻣﯽ ﭘﺎراﻣﺘﺮﻫﺎي ﺗﻐﯿﯿﺮﭘﺬﯾﺮي ﺿﺮﺑﺎن ﻗﻠﺐ ﺑﺎ روش زﻣﺎﻧﯽ و ﺗﻮاﻟﯽﻫﺎي ﺿﺮﺑﺎن ﻗﻠﺐ اﻧﺪازه ﮔﯿﺮي ﮔﺮدﯾﺪ. ﺳﭙﺲ اﻧﺤﺮاف ﻣﻌﯿﺎر ﺗﻮاﻟﯽ ﻫﺎي ﺛﺒﺖ ﺷﺪه ﺑﺎ اﺳﺘﻔﺎده از روشPoincare plotﺗﻔﺴﯿﺮ ﮔﺮدﯾﺪ. ﺑﻪ ﻣﻨﻈﻮر ﻣﻘﺎﯾﺴﻪ ﺗﻔﺎوتﻫﺎ در ﻣﺮاﺣﻞ ﭘﮋوﻫﺶ، از آزﻣﻮنﻫﺎي ﺗﯽ ﻣﺴﺘﻘﻞ و ﻫﻤﺒﺴﺘﻪ اﺳﺘﻔﺎده ﮔﺮدﯾﺪ. ﯾﺎﻓﺘﻪﻫﺎ :اﻧﺤﺮاف ﻣﻌﯿﺎر آﻧﯽ اﯾﻨﺘﺮوال ﺿﺮﺑﻪ ﺑﻪ ﺿﺮﺑﻪ ﺗﻐﯿﯿﺮﭘﺬﯾﺮي ﺿﺮﺑﺎن ﻗﻠﺐ(SD1) ﻧﺴﺒﺖ ﺑﻪ ﮔﺮوه ﮐﻨﺘﺮل(01/ 0=p) و ﭘﯿﺶ آزﻣﻮن(01/ 0=p) و اﻧﺤﺮاف ﻣﻌﯿﺎر ﻣﺪاوم اﯾﻨﺘﺮوال ﺿﺮﺑﻪ ﺑﻪ ﺿﺮﺑﻪ ﺗﻐﯿﯿﺮﭘﺬﯾﺮي ﺿﺮﺑﺎن ﻗﻠﺐ(SD2) ﻧﺴﺒﺖ ﺑﻪ ﮔﺮوه ﮐﻨﺘﺮل(0/01=p) و ﭘﯿﺶ آزﻣﻮن(0/02= p) اﻓﺰاﯾﺶ ﻣﻌﻨﯽدارﯾﺪاﺷﺖ.ﺑﻌﺪ از ﺗﺒﺪﯾﻞ ﺑﻪ ﺣﺎﻟﺖ ﻧﺮﻣﺎل SD1nﻧﺴﺒﺖ ﺑﻪ ﮔﺮوه ﮐﻨﺘﺮل90/02=p)اﻓﺰاﯾﺶ ﻣﻌﻨﯽدار و ﻧﺴﺒﺖ ﺑﻪ ﭘﯿﺶ آزﻣﻮن(0/08=p) اﻓﺰاﯾﺶ ﻏﯿﺮﻣﻌﻨﯽداري داﺷﺖ، SD2nﻧﺴﺒﺖ ﺑﻪ ﮔﺮوه ﮐﻨﺘﺮل(0/04=p) اﻓﺰاﯾﺶ ﻣﻌﻨﯽ دارو ﻧﺴﺒﺖ ﺑﻪ ﭘﯿﺶ آزﻣﻮن(0/02=p) اﻓﺰاﯾﺶ ﻏﯿﺮﻣﻌﻨﯽداري داﺷﺖ. ﻣﻘﺎﯾﺴﻪ ﻧﺴﺒﺖ اﻧﺤﺮاف ﻣﻌﯿﺎر آﻧﯽ ﺑﻪ اﻧﺤﺮاف ﻣﻌﯿﺎر ﻣﺪاوم(SD1/SD2) ﻧﺴﺒﺖ ﺑﻪ ﮔﺮوه ﮐﻨﺘﺮل و ﭘﯿﺶ آزﻣﻮن ﺗﻔﺎوت ﻣﻌﻨﯽداري را ﻧﺸﺎن ﻧﺪاد. ﻧﺘﯿﺠﻪﮔﯿﺮي:اﺟﺮاي ﻣﻨﻈﻢ و ﻣﺪاوم ﻓﻌﺎﻟﯿﺖ ورزﺷﯽ ﻫﻮازي ﺑﺎ ﺷﺪت ﻣﺘﻮﺳﻂ ﺳﺒﺐ ﺑﻬﺒﻮد ﭘﺎﺳﺦ ﭘﺬﯾﺮي ﻋﺼﺒﯽ ﻗﻠﺒﯽ در ﻣﺮدان ﺟﻮان داﻧﺸﮕﺎﻫﯽ ﻣﯽﮔﺮدد.

Background and Purpose: Nonlinear dynamic geometric methods of heart rate variability over linear methods such as time and frequency-domain provides valuable information about the response of the cardiac autonomic system. The aim of this study was to investigate the effect of a consecutive course of aerobic exercise on heart rate variability using a nonlinear method with the possibility of repeating similar sequences of heart rate in young college men. Methodology: 28 young college men were randomly divided into research groups (control group; aerobic exercise group). In the pre-test period and after the aerobic exercise intervention, all parameters of heart rate variability were measured by time-domain method and heart rate sequences. The standard deviation of the recorded sequences was then interpreted using the Poincare plot method. In order to compare the differences in the research stages, independent and paired t-tests were used. Results: Immediate interval standard deviation of heart rate variability (SD1) increased significantly compare to the control group (p = 0.01) and pretest (p = 0.01) and continuous interval standard deviation of heart rate variable (SD2) increased significantly compared to the control group (p = 0.01) and pre-test (p = 0.02). After conversion to normal, SD1n compared to the control group (p = 0.02) increased significantly and There was a non-significance increases compared to the pre-test (p = 0.08), SD2n had a significant increase compared to the control group (p = 0.04) and a significant increase compared to the pre-test (p = 0.02). Comparing the ratio of the instantaneous standard deviation to the continuous standard deviation (SD1 / SD2) with respect to the control and pretest groups did not show a significant difference (p≥0.05). Conclusion: Regular and continuous performance of moderate-intensity aerobic exercise improves cardiac neuroresponsibility in young college men.