چکیده:
<em>Introduction:</em> 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).<br /> <em>Material & Methods:</em> 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.<br /> <em>Results:</em> 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.<br /> <em>Conclusions:</em> 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.
خلاصه ماشینی:
Effects of Heavy Duty versus traditional resistance training on thigh muscle cross-sectional area Javad Mokaram Bakhtajerdi1 and Mehrzad Moghadasi2* Received: 10 February 2018/ Accepted: 27 May 2018 (1) Department of Exercise physiology, Marvdasht branch, Islamic Azad University, Marvdasht, Iran.
com Abstract Introduction: Heavy Duty resistance training (HD) is a new method that might improve muscle strength and hypertrophy.
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).
Results: The results showed that maximum strength in each station was increased after HD and TRT (P Keywords: Heavy Duty resistance training, Traditional resistance training, Muscle hypertrophy, Growth hormone.
A high training volume is associated with an augmented anabolic hormone response to exercise (14,15) that thought to provide an enhanced stimulus for muscle hypertrophy (16,17).
By our knowledge, there is no study that was performed to examine the effect of HD versus traditional resistance training (TRT) on muscle cross-sectional area (CSA) and its related hormones.
Thus in the present study, we compared the effects of HD versus TRT on thigh muscle CSA and growth hormone (GH) in untrained healthy men.
(2009) show that strength training with responsible for the higher increase of thigh muscle CSA in HD method compared to the TRT method.
Elevations in ostensibly anabolic hormones with resistance exercise enhance neither training-induced muscle hypertrophy nor strength of the elbow flexors.
The effect of resistive exercise rest interval on hormonal response, strength, and hypertrophy with training.