ﺗﺄﺛﯿﺮ ﻫﺸﺖ ﻫﻔﺘﻪ ﺗﻤﺮﯾﻦ ﺗﻨﺎوﺑﯽ ﺑﺎ و ﺑﺪون ﻣﺤﺪودﯾﺖ ﺟﺮﯾﺎن ﺧﻮن در ﺷﺪتﻫﺎي ﻣﺨﺘﻠﻒ ﺑﺮ ﻋﻤﻠﮑﺮد اﺳﺘﻘﺎﻣﺘﯽ، ﻗﺪرت و ﺳﻄﺢ ﺳﺮﻣﯽ ﻣﺎﯾﻮاﺳﺘﺎﺗﯿﻦ در ﻣﺮدان ورزﺷﮑﺎر

The Effects of Eight Weeks Interval Training with and Without Blood Flow Restriction at Different Intensities on Endurance Performance, Strength and Serum Level of Myostatin in Male Athletes

ﺳﺎﺑﻘﻪ و ﻫﺪف: اﯾﺠﺎد ﻣﺤﺪودﯾﺖ ﺟﺮﯾﺎن ﺧﻮن ﺑﻪ ﻋﻨﻮان ﯾﮏ روش ﻣﮑﻤﻞ در ﺑﻬﺒﻮد ﺷﺎﺧﺺﻫﺎي آﻣﺎدﮔﯽ ﺟﺴﻤﺎﻧﯽ ﻣﻄﺮح ﺷﺪه اﺳﺖ. ﺑﺎ اﯾﻦ ﺣﺎل، ﺗﺄﺛﯿﺮ ﺳﻮدﻣﻨﺪي اﯾﻦ روش ﺑﻪ ﻫﻤﺮاه ﺗﻤﺮﯾﻨﺎت ﺗﻨﺎوﺑﯽ دوﯾﺪن ﮐﻤﺘﺮ ﻣﻮرد ﺗﻮﺟﻪ ﻗﺮار ﮔﺮﻓﺘﻪ اﺳﺖ. ﻫﺪف از ﻣﻄﺎﻟﻌﻪ ﺣﺎﺿﺮ، ﺑﺮرﺳﯽ اﺛﺮ ﻫﺸﺖ ﻫﻔﺘﻪ ﺗﻤﺮﯾﻦ ﺗﻨﺎوﺑﯽ ﺑﺎ و ﺑﺪون ﻣﺤﺪودﯾﺖ ﺟﺮﯾﺎن ﺧﻮن در ﺷﺪتﻫﺎي ﻣﺨﺘﻠﻒ ﺑﺮ ﻋﻤﻠﮑﺮد اﺳﺘﻘﺎﻣﺘﯽ، ﻗﺪرت و ﺳﻄﺢ ﺳﺮﻣﯽ ﻣﺎﯾﻮاﺳﺘﺎﺗﯿﻦ در ﻣﺮدان ورزﺷﮑﺎر ﺑﻮد. ﻣﻮاد و روﺷﻬﺎ: 32 ورزﺷﮑﺎر ﺟﻮان )ﺳﻦ= 19/6±0/49 ﺳﺎل، وزن= 59/3±6/44 ﮐﯿﻠﻮﮔﺮم( ﺑﻪ ﻃﻮر ﺗﺼﺎدﻓﯽ ﺑﻪ ﭼﻬﺎر ﮔﺮوه ﺗﻘﺴﯿﻢ ﺷﺪه و ﻫﺮ ﮔﺮوه ﺑﺮاﺳﺎس درﺻﺪي از ﺣﺪاﮐﺜﺮ ﺳﺮﻋﺖ ﻫﻮازي ﺑﻪ ﺗﻤﺮﯾﻦ ﭘﺮداﺧﺘﻨﺪ: ﮔﺮوهﻫﺎي ﺗﻨﺎوﺑﯽ ﺑﺎ ﺷﺪت ﮐﻤﺘﺮ )85 درﺻﺪ ﺣﺪاﮐﺜﺮ ﺳﺮﻋﺖ ﻫﻮازي( ﺑﺎ )8 ﻧﻔﺮ( و ﺑﺪون )8 ﻧﻔﺮ( ﻣﺤﺪودﯾﺖ ﺟﺮﯾﺎن ﺧﻮن، ﮔﺮوه ﺗﻨﺎوﺑﯽ ﺷﺪت ﺑﺎﻻ )100 درﺻﺪ ﺣﺪاﮐﺜﺮ ﺳﺮﻋﺖ ﻫﻮازي( )8 ﻧﻔﺮ( و ﮔﺮوه ﮐﻨﺘﺮل )8 ﻧﻔﺮ(. آزﻣﻮدﻧﯽﻫﺎ 24 ﺟﻠﺴﻪ )3 ﺟﻠﺴﻪ در ﻫﻔﺘﻪ( ﺗﻤﺮﯾﻦ اﻧﺠﺎم دادﻧﺪ و ﻫﺮ ﺟﻠﺴﻪ ﺷﺎﻣﻞ دورهﻫﺎي ﺗﮑﺮاري دوﯾﺪن )2 دﻗﯿﻘﻪ( روي ﻧﻮارﮔﺮدان ﺑﺎ ﯾﮏ دﻗﯿﻘﻪ اﺳﺘﺮاﺣﺖ ﺑﯿﻦ ﺗﮑﺮارﻫﺎ ﺑﻮد. ﻗﺒﻞ و ﭘﺲ از دوره ﺗﻤﺮﯾﻨﯽ ﻧﻤﻮﻧﻪﻫﺎي ﺧﻮﻧﯽ ﺟﻤﻊآوري و آزﻣﻮنﻫﺎي ﻣﻮرد ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﺷﺪ. از روش ﺗﺠﺰﯾﻪ و ﺗﺤﻠﯿﻞ وارﯾﺎﻧﺲ ﺑﺎ اﻧﺪازهﮔﯿﺮي ﻣﮑﺮر ﺑﺮاي ﺑﺮرﺳﯽ ﺗﻔﺎوت ﺑﯿﻦ ﮔﺮوهﻫﺎ اﺳﺘﻔﺎده ﮔﺮدﯾﺪ. ﺳﻄﺢ ﻣﻌﻨﯽداري آﻣﺎري 0/05 ≤P در ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﺷﺪ. ﯾﺎﻓﺘﻪﻫﺎ: ﺗﻔﺎوت ﻣﻌﻨﯽداري ﺑﯿﻦ ﮔﺮوهﻫﺎ در ﻗﺪرت ﻋﻀﻼت ﭘﺎ، ﻋﻤﻠﮑﺮد اﺳﺘﻘﺎﻣﺘﯽ و ﺳﻄﺢ ﺳﺮﻣﯽ ﻣﺎﯾﻮاﺳﺘﺎﺗﯿﻦ ﻣﺸﺎﻫﺪه ﮔﺮدﯾﺪ )0/05

Background and Purpose: Blood flow restriction has been suggested as a complementary method to improving physical fitness indicators. However, the efficacy of this method along with interval running training has received less attention. The aim of this study was to examination the effects of eight weeks interval-training with and without blood flow restriction (BFR) at different intensities on endurance performance, strength and serum level of Myostatian in male athletes. Methodology: Thirty two young athletes (19.6 ± 0.49 years; 59.3 ± 6.44 kg) were selected and randomly divided into four groups and training based percent of maximal aerobic speed (MAS): 85% MAS with (N=8) and without (N=8) BFR, 100% MAS (N=8) and control (N=8). The participants completed 24 training sessions (3 sessions per week) comprised of repeated bouts of 2 min running on a treadmill interspersed by 1-min recovery. Blood sampling and tests were taken before and after training period. The one-way repeated-measures ANOVA was used to determine difference between groups. The significance level was set at P ≤ 0.05. Results: There were significant difference in leg muscle strength, endurance performance and serum level of Myostatin between groups. Leg muscle strength significantly increased only in group 85%+BFR and endurance performance significantly increased in 85% with BFR and 100 groups, so, serum level of Myostatin significantly decreased in 85% with BFR and 100 groups. Conclusion: The results suggest that low intensity interval running with BFR can improves simultaneously both aerobic fitness and muscle strength in athletes and more benefit have in compare to high intensity interval training.