Effects of Heavy Duty versus traditional resistance training on thigh muscle cross-sectional area
الموضوعات : Journal of Physical Activity and HormonesJavad Mokaram Bakhtajerdi 1 , Mehrzad Moghadasi 2
1 - Department of Exercise physiology, Marvdasht branch, Islamic Azad University, Marvdasht, Iran.
2 - Head of research committee of Fars Sport Medicine Association
الکلمات المفتاحية: Growth hormone, Heavy Duty resistance training, Traditional resistance training, Muscle hypertrophy,
ملخص المقالة :
Introduction: Heavy Duty resistance training (HD) is a new method that might improve muscle strength and hypertrophy. The effect of this method on thigh muscle hypertrophy is not well-known. The purpose of the present study was to examine the effects of HD versus traditional resistance training (TRT) on thigh muscle cross-sectional area (CSA). Material & Methods: Twenty untrained healthy men (age: 25.6 ± 2.0 mean ± SD) volunteered to participate in this study. The subjects were divided into HD group (n=10) or TRT group (n=10) randomly. The subjects in HD and TRT executed five resistance exercises selected to stress the thigh muscle groups in the following order: leg press, squat, leg extension, prone leg curl, and dead lift. HD and TRT consisted of 50-60 min of station weight training per day, 3 days a week, for 8 weeks. TRT training was performed in 5 stations and included 4 sets with 6-12 maximal repetitions at 70-80% of 1-RM in each station with 2-3 minute of rest. HD training was performed in 5 stations and included 4 sets with 6-10 maximal repetitions at 70% of 1-RM in each station with 10 second of rest. Thigh muscle CSA and grow hormone (GH) were measured before and after the intervention. Results: The results showed that maximum strength in each station was increased after HD and TRT (P<0.05). Thigh muscle CSA also was increased after HD and TRT; however the increase in thigh muscle CSA was higher in HD than TRT. For GH no significant differences were observed after the HD and TRT methods. Conclusions: In summary, HD method is better than TRT method for thigh muscle CSA however no significant differences were found for GH level after these resistance training methods.
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