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Jafarnezhadgero, AmirAli, Sadri, Amirhosein, Bahrami Sharif, Mohammad Mahdi, Alipour Sarinasirloo, Milad. (1398). Comparison of the EMG Frequency Spectrum of Lower Limb Muscles during Weight Training with Traditional and Novel Equipment. سامانه مدیریت نشریات علمی, 3(2), 19-31.
AmirAli Jafarnezhadgero; Amirhosein Sadri; Mohammad Mahdi Bahrami Sharif; Milad Alipour Sarinasirloo. "Comparison of the EMG Frequency Spectrum of Lower Limb Muscles during Weight Training with Traditional and Novel Equipment". سامانه مدیریت نشریات علمی, 3, 2, 1398, 19-31.
Jafarnezhadgero, AmirAli, Sadri, Amirhosein, Bahrami Sharif, Mohammad Mahdi, Alipour Sarinasirloo, Milad. (1398). 'Comparison of the EMG Frequency Spectrum of Lower Limb Muscles during Weight Training with Traditional and Novel Equipment', سامانه مدیریت نشریات علمی, 3(2), pp. 19-31.
Jafarnezhadgero, AmirAli, Sadri, Amirhosein, Bahrami Sharif, Mohammad Mahdi, Alipour Sarinasirloo, Milad. Comparison of the EMG Frequency Spectrum of Lower Limb Muscles during Weight Training with Traditional and Novel Equipment. سامانه مدیریت نشریات علمی, 1398; 3(2): 19-31.

Comparison of the EMG Frequency Spectrum of Lower Limb Muscles during Weight Training with Traditional and Novel Equipment

Journal of Advanced Sport Technology
مقاله 3، دوره 3، شماره 2، اسفند 2019، صفحه 19-31    اصل مقاله (903.5 K)
نوع مقاله: Original research papers
نویسندگان
AmirAli Jafarnezhadgero1؛ Amirhosein Sadri2؛ Mohammad Mahdi Bahrami Sharif2؛ Milad Alipour Sarinasirloo2
1Department of Physical Education and Sport Science, Faculty of Educational Science and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
2Department of Physical Education and Sport Sciences, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran.
چکیده
Many practitioners and trainers advise designing and executing resistance training programs that include free weights and machines for strength training.  The aim of the present study was to compare the frequency spectrum of lower limb muscles during weight training with traditional and novel equipment. Fourteen healthy power lifters (age: 26±7 years) were participated in this study. A portable EMG system with six pairs of bipolar surface electrodes was used to record the electrical activity of the selected lower limb muscles at a sampling frequency of 1200 Hz. Participants had enough experience to perform Free Weights Squat, Smith Machine Squat, Smith Machine Squat with one leg and the Dead lift movements. Participants carried out each movement, 5 times at an intensity equal to 50% of one-repetition-maximum level. The results showed higher median frequency of the vastus lateralis muscle during free weight single-leg squat than those that in the free weight squat (p=0.001) and dead lift (p=0.000) movements in lifting phase. Also, the median frequency of vastus lateralis muscle in single-limb squat with smith machine was significantly higher than that in the dead lift movement (p=0.021). The median frequency spectrum of the gastrocnemius muscle in the free weight squat movement showed a significant increase during the downward phase relative to the free weight single-leg squat movement (p=0.039).  In order to strengthen vastus lateralis muscle in athletes or individuals with weak vastus lateralis muscle, free weight single-leg squat movement is more effective than those that in the other movements.
 
 
کلیدواژه‌ها
Keywords: Frequency spectrum؛ Lower limb؛ Squat؛ Smith machine؛ Dead lift
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