The muscle activation of the erector spinae during hyperextension with and without the pelvis restrained

The purpose of this study was to determine if pelvic restraint during hyperextension on a variable angle Roman chair (VARC) changes the muscle activation of the erector spinae musculature. Seventy volunteers (18–35 years) performed hyperextension exercises on the VARC with and without the pelvis res...

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Bibliographic Details
Published in:Physical therapy in sport 2002-11, Vol.3 (4), p.165-174
Main Authors: Benson, Michael E., Smith, Darla R., Bybee, Ronald F.
Format: Article
Language:English
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Summary:The purpose of this study was to determine if pelvic restraint during hyperextension on a variable angle Roman chair (VARC) changes the muscle activation of the erector spinae musculature. Seventy volunteers (18–35 years) performed hyperextension exercises on the VARC with and without the pelvis restrained. Surface electromyography (EMG) was used to measure the muscle activation of the erector spinae at the third lumbar vertebra (L3). Total root mean square (RMS) for eccentric and concentric phases were amplitude normalized to a maximal voluntary isometric contraction (MVIC). A post test questionnaire was used to determine the subjective feeling of localized fatigue. The EMG data were analyzed with a Multivariate Hotelling's T2 test and univariatet -tests. The questionnaire data were analyzed using McNemar's test. Alpha was set at 0·05. A statistically significant (p
ISSN:1466-853X
1873-1600
DOI:10.1054/ptsp.2002.0118