Abstract:
: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.
journal_name
Int J Sports Medjournal_title
International journal of sports medicineauthors
Ebben WP,Feldmann CR,Dayne A,Mitsche D,Alexander P,Knetzger KJdoi
10.1055/s-2008-1038785subject
Has Abstractpub_date
2009-01-01 00:00:00pages
1-8issue
1eissn
0172-4622issn
1439-3964journal_volume
30pub_type
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journal_title:International journal of sports medicine
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journal_title:International journal of sports medicine
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:International journal of sports medicine
pub_type: 杂志文章,评审
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journal_title:International journal of sports medicine
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pub_type: 临床试验,杂志文章,随机对照试验
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