ارائه روش تمريني مقاومتي -لاكتيكي و مقايسه تاثير آن با تمرين مقاومتي سنتي بر هايپرتروفي عضلاني در بدنسازان حرفه اي

Presentation of Lacto-Resistance Training Method and Comparing Its Effect on Muscle Hypertrophy with Traditional Resistance Training In Professional Bodybuilders

ﻣﻘﺪﻣﻪ و ﻫﺪف : دﺳﺘﮑﺎري ﻣﺘﻐﯿﺮ ﻫﺎي ﺗﻤﺮﯾﻦ ﺑﺎ ﻫﺪف اﻓﺰاﯾﺶ ﻫﺮ ﭼﻪ ﺑﯿﺸﺘﺮ اﺳﺘﺮس ﻣﺘﺎﺑﻮﻟﯿﮏ ﻋﻀﻠﻪ ﻣﯽ ﺗﻮاﻧﺪ ﺑﻪ ﻫﺎﯾﭙﺮﺗﺮوﻓﯽ ﻋﻀﻼﻧﯽ ﻣﻨﺠﺮ ﺷﻮد. ﻫﺪف از ﭘﮋوﻫﺶ ﺣﺎﺿﺮ، اراﺋﻪ و ﺑﺮرﺳﯽ اﺛﺮ4 ﻫﻔﺘﻪ ﺗﻤﺮﯾﻦ ﻣﻘﺎوﻣﺘﯽ ﺑﺎ روش ﻣﻘﺎوﻣﺘﯽ-ﻻﮐﺘﯿﮑﯽ ﺑﺮ ﻫﺎﯾﭙﺮﺗﺮوﻓﯽ ﻋﻀﻠﻪ راﺳﺖ راﻧﯽ و ﻣﻘﺎﯾﺴﻪ آن ﺑﺎ ﺗﻤﺮﯾﻦ ﻣﻘﺎوﻣﺘﯽ-ﺳﻨﺘﯽ ﺑﻮد. ﻣﻮاد و روش ﻫﺎ: ﺑﯿﺴﺖ و ﭼﻬﺎر ﺑﺪﻧﺴﺎز ﺣﺮﻓﻪ اي ﻣﺮد ﺑﺮاﺳﺎس ﺳﻄﺢ ﻣﻘﻄﻊ ﻋﻀﻠﻪ راﺳﺖ راﻧﯽ ﻫﻤﺴﺎن ﺳﺎزي و ﺑﻄﻮر ﺗﺼﺎدﻓﯽ در ﺳﻪ ﮔﺮوه ﺗﻤﺮﯾﻦ ﻣﻘﺎوﻣﺘﯽ-ﻻﮐﺘﯿﮑﯽ)8=n( ، ﻣﻘﺎوﻣﺘﯽ-ﺳﻨﺘﯽ)n=8(وﮐﻨﺘﺮل)n=8( ﺗﻘﺴﯿﻢ ﺷﺪﻧﺪ. ﻣﻘﺎﯾﺴﻪ اﺳﺘﺮس ﻣﺘﺎﺑﻮﻟﯿﮏ دو ﻧﻮع ﺗﻤﺮﯾﻦ از روش ﮐﻨﺘﺮل ﻻﮐﺘﺎت و اوره ﺧﻮن ﺑﻌﺪ از اﻧﺠﺎم ﺣﺮﮐﺖ اﺳﮑﻮات در ﯾﮏ ﺟﻠﺴﻪ ﻣﺠﺰا ﮐﻨﺘﺮل ﺷﺪ. ﺳﻄﺢ ﻣﻘﻄﻊ ﻋﻀﻠﻪ راﺳﺖ راﻧﯽ ﺑﺎ ﺳﻮﻧﻮﮔﺮاﻓﯽ و ﻗﺪرت ﺑﺎ ﻓﺮﻣﻮل ﯾﮏ ﺗﮑﺮار ﺑﯿﺸﯿﻨﻪ ﻗﺒﻞ و ﺑﻌﺪ از اﻧﺠﺎم 4 ﻫﻔﺘﻪ ﺗﻤﺮﯾﻦ ﻣﻘﺎوﻣﺘﯽ ارزﯾﺎﺑﯽ و ﺗﻔﺎوت ﻫﺎي درون و ﺑﯿﻦ ﮔﺮوﻫﯽ ﺑﺎ آزﻣﻮن ﺗﺤﻠﯿﻞ ﮐﻮوارﯾﺎﻧﺲ ﺗﺤﻠﯿﻞ ﺷﺪﻧﺪ. ﯾﺎﻓﺘﻪﻫﺎ: ﺳﻄﻮح ﻻﮐﺘﺎت ﺧﻮن ﺑﻌﺪ از اﺟﺮاي ﺣﺮﮐﺖ اﺳﮑﻮات در دو ﮔﺮوه ﻣﻘﺎوﻣﺘﯽ-ﻻﮐﺘﯿﮑﯽ (10/76±1/35) و ﻣﻘﺎوﻣﺘﯽ-ﺳﻨﺘﯽ (7/70±1/16) ﺑﻄﻮر ﻣﻌﻨﯽ دار ﻧﺴﺒﺖ ﺑﻪ ﺳﻄﺢ ﭘﺎﯾﻪ اﻓﺰاﯾﺶ ﯾﺎﻓﺖ و ﺗﻐﯿﯿﺮات ﻻﮐﺘﺎت ﺑﯿﻦ دو ﮔﺮوه ﻣﻌﻨﯽ دار ﺑﻮد (0/05 < P). ﺑﻌﺪ از 4 ﻫﻔﺘﻪ ﺗﻤﺮﯾﻦ ﻣﻘﺎوﻣﺘﯽ ﺗﻐﯿﯿﺮات در ﺳﻄﺢ ﻣﻘﻄﻊ ﻋﻀﻠﻪ راﺳﺖ راﻧﯽ ﺗﻨﻬﺎ در ﮔﺮوه ﻣﻘﺎوﻣﺘﯽ-ﻻﮐﺘﯿﮑﯽ ﻧﺴﺒﺖ ﺑﻪ ﺳﻄﻮح ﭘﺎﯾﻪ (0/05 < P) و ﮔﺮوه ﮐﻨﺘﺮل ﺗﻔﺎوت ﻣﻌﻨﯽ دار داﺷﺖ (0/05 < P). ﯾﮏ ﺗﮑﺮار ﺑﯿﺸﯿﻨﻪ در ﺣﺮﮐﺖ اﺳﮑﻮات در ﻫﺮ دو ﮔﺮوه ﺗﺠﺮﺑﯽ ﻧﺴﺒﺖ ﺑﻪ ﺣﺎﻟﺖ ﭘﺎﯾﻪ اﻓﺰاﯾﺶ ﻣﻌﻨﯽ دار داﺷﺖ (0/01 < P) و ﻣﻘﺎدﯾﺮ آن در ﮔﺮوه ﻣﻘﺎوﻣﺘﯽ-ﻻﮐﺘﯿﮑﯽ ﺑﯿﺸﺘﺮ از ﮔﺮوه ﺳﻨﺘﯽ و ﺗﻔﺎوت ﺑﯿﻦ دو ﮔﺮوه ﻧﯿﺰ ﻣﻌﻨﯽ دار ﺑﻮد (0/05 < P). ﻧﺘﯿﺠﻪ ﮔﯿﺮي: اﻧﺠﺎم ﺗﻤﺮﯾﻦ ﻣﻘﺎوﻣﺘﯽ ﺑﻪ روش ﻣﻘﺎوﻣﺘﯽ-ﻻﮐﺘﯿﮑﯽ، اﺳﺘﺮس ﻣﺘﺎﺑﻮﻟﯿﮏ ﺑﯿﺸﺘﺮي ﻧﺴﺒﺖ ﺑﻪ ﺗﻤﺮﯾﻦ ﻣﻘﺎوﻣﺘﯽ-ﺳﻨﺘﯽ اﯾﺠﺎد ﻣﯽ ﮐﻨﺪ و اﺛﺮات آن در ﻫﺎﯾﭙﺮﺗﺮوﻓﯽ ﻋﻀﻼﻧﯽ و اﮐﺘﺴﺎب ﻗﺪرت ﭼﺸﻤﮕﯿﺮ ﺗﺮ از ﺗﻤﺮﯾﻦ ﻣﻘﺎوﻣﺘﯽ-ﺳﻨﺘﯽ اﺳﺖ.

Background & Purpose: Manipulating of training variables with the aim to augment muscle metabolic stress could result in muscle hypertrophy.The purpose of the current study was to present a lacto-resistance training method and to compare its effect on rectus femoris muscle hypertrophy with traditional resistance training. Methodology: Twenty- four male professional bodybuilders were randomly divided into three groups based on muscle cross-section area: lacto-resistance (n=8), traditional-resistance (n=8) and control (n=8). The comparison of metabolic stress between two types of exercise was done using monitoring blood lactate and urea following squat exercise. Muscle cross-section area and strength were measured by sonography and one repetition maximum (1RM), respectively, before and after 4 weeks of resistance training. Analysis of covariance was used to evaluate inter – and intra groups differences. Results: Compared to the baseline values, blood lactate levels significantly increased following squat exercise in both lacto-resistance (10.76±1.35) and traditional–resistance (7.70±1.16) groups, and the changes in blood lactate was significant between two groups (P˂0.05). After 4 weeks of resistance training, the changes in rectus femoris muscle cross-section had a significant difference only in lacto-resistance group in comparison to its own baseline values (P˂0.05) and the control group (P˂0.05). Compared to the baseline values, 1RM measured in squat exercise significantly increased in both experimental groups (P˂0.01), the difference between groups was significant, and lacto-resistance group had higher values than those from the traditional-resistance group (P˂0.05). Conclusion: Compared to the traditional resistance training, Lacto-resistance training induces a higher metabolic stress and its effects on muscle hypertrophy and strength are more impressive.