Int J Sports Med 2009; 30(1): 1-8
DOI: 10.1055/s-2008-1038785
Training & Testing

© Georg Thieme Verlag KG Stuttgart · New York

Muscle Activation during Lower Body Resistance Training

W. P. Ebben1 , C. R. Feldmann1 , A. Dayne1 , D. Mitsche1 , P. Alexander1 , K. J. Knetzger1
  • 1Exercise Science, Marquette University, Milwaukee, Wisconsin, United States
Further Information

Publication History

accepted after revision June 10, 2008

Publication Date:
30 October 2008 (online)


This study evaluated the biceps femoris (BF), rectus femoris (RF), and vastus lateralis (VL) activation and activation ratios of a variety of resistance training exercises characterized by knee extension, and determined if subject strength or gender affects these variables. The exercises evaluated included the leg extension, squat, deadlift, lunge, and step up. Subjects included 20 athletes and recreationally active college students. Electromyography (EMG) of the muscles expressed as a percentage of maximum voluntary isometric contraction (MVIC), as well as the BF to RF and BF to VL EMG ratio, were determined for each exercise. There was no significant interaction between gender and exercise type for the RMS EMG of the BF (p = 0.67), RF (p = 0.53), or VL (p = 0.06). Main effects were found for the RMS EMG of the BF (p = 0.00), RF (p = 0.00), and VL (p = 0.00), as well as the RMS EMG of the BF to RF activation ratio (p = 0.00) and BF to VL activation ratios (p = 0.003), between exercises. Peak RMS EMG was also assessed. Post hoc analysis identified specific differences in muscle activation and ratios between exercises. Clinicians should consider the magnitude of muscle activation and activation ratios when prescribing hamstring and quadriceps exercises.


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Dr. PhD William Patrick Ebben

Marquette University
Exercise Science

PO Box 1881

Milwaukee, Wisconsin 53201

United States

Phone: + 1 41 42 88 56 07

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