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Electromyographic activity of the trunk extensor muscles: Effect of varying hip position and lumbar posture during Roman chair exercise  John M. Mayer,

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Presentation on theme: "Electromyographic activity of the trunk extensor muscles: Effect of varying hip position and lumbar posture during Roman chair exercise  John M. Mayer,"— Presentation transcript:

1 Electromyographic activity of the trunk extensor muscles: Effect of varying hip position and lumbar posture during Roman chair exercise  John M. Mayer, DC, PhD, Joe L. Verna, DC, Todd M. Manini, MS, Vert Mooney, MD, James E. Graves, PhD  Archives of Physical Medicine and Rehabilitation  Volume 83, Issue 11, Pages (November 2002) DOI: /apmr Copyright © 2002 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

2 Fig. 1 Diagram of the angle settings on the VARC. Figure shows subject at 45° of trunk extension with the VARC positioned at 45°. Archives of Physical Medicine and Rehabilitation  , DOI: ( /apmr ) Copyright © 2002 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

3 Fig. 2 Dynamic trunk extension exercise on a VARC with surface electrodes attached to the subject. Archives of Physical Medicine and Rehabilitation  , DOI: ( /apmr ) Copyright © 2002 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

4 Fig. 3 Trunk extensor muscle surface electromyographic activity during Roman chair exercise: effect of hip position. Values are means ± SEs (N=12). Legend: ●, internal hip rotation; ●, external hip rotation. *Internal hip rotation is greater than external hip rotation (P≤.05). Archives of Physical Medicine and Rehabilitation  , DOI: ( /apmr ) Copyright © 2002 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

5 Fig. 4 Trunk extensor muscle surface electromyographic activity during Roman chair exercise: effect of lumbar posture. Values are means ± SEs (N=12). Legend: ●, biphasic posture; ●, nonbiphasic posture. *Biphasic greater than nonbiphasic (P≤.05). Archives of Physical Medicine and Rehabilitation  , DOI: ( /apmr ) Copyright © 2002 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

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