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Type :thesis
Subject :GV Recreation Leisure
Main Author :Khalila Liyana Koderi
Title :The effects of stance width on muscle activation and number of repetitions completed during Romanian deadlift
Place of Production :Tanjong Malim
Publisher :Fakulti Sains Sukan dan Kejurulatihan
Year of Publication :2019
Notes :pedagogi
Corporate Name :Universiti Pendidikan Sultan Idris
PDF Guest :Click to view PDF file
PDF Full Text :The author has requested the full text of this item to be restricted.

Abstract : Universiti Pendidikan Sultan Idris
The  purpose  of  the  study  was  to  determine  the  effects  of  stance-width  on  muscle  activation and number of repetitions completed during narrow, shoulder-width and wide stance during  Romanian deadlift (RDL) exercise. Thirty recreationally active, resistance trained  men,  aged   19-23  years  old  were  randomly  recruited  based  on  volunteerism  as participants  in  this   study.  The  participants  were  assigned  to  perform  the  RDL  with narrow, shoulder-width and  wide stances while carrying 80% of one repetition maximum loading. Muscle activation was measured  using electromyography (EMG) method at the vastus lateralis, biceps femoris, gluteus maximus and  multifidus muscles. The EMG data were reported in concentric and eccentric values. The participants  were given three trials, and the number of repetitions and EMG of most successful set were taken to  be analyzed. One way repeated measure Analysis of Variances (ANOVA) was conducted to determine and  compare the muscle activation and number of repetitions between the three stances. Analysis of  concentric phase showed significant main effects were found in the gluteus maximus, F(2, 58) =  338.97; p = 0.000, and erector spinae muscle, F(2, 58) = 302.19, p = 0.000.  Similar  to  the  concentric  phase,  analysis  of  eccentric  phase  showed  significant  main  effects  were  found  in  the  gluteus  maximus  activation,  F(2,  58)  =  204.982;  p  =  0.000, and erector spinae muscle, F(2, 58) = 215.184, p = 0.000. Analysis of number of repetitions  that can be completed by the participants showed significant main effects, F(2, 28)  =  37.152;  p   =  0.000.  In  conclusion,  different  stance-width  used  did  affect  muscle activation and  performance during RDL exercise. As the implication of this study, as can be seen in the EMG and  number of repetitions data, performing wide and shoulder width stance are recommended as these  stances allowed participants to perform better, without putting more stress on the lower back.  

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