TY - JOUR
T1 - Muscle activity, cross-sectional area, and density following passive standing and whole body vibration
T2 - A case series
AU - Masani, Kei
AU - Alizadeh-Meghrazi, Milad
AU - Sayenko, Dimitry G.
AU - Zariffa, Jose
AU - Moore, Cameron
AU - Giangregorio, Lora
AU - Popovic, Milos R.
AU - Craven, B. Catharine
N1 - Publisher Copyright:
© The Academy of Spinal Cord Injury Professionals, Inc. 2014.
PY - 2014/9/1
Y1 - 2014/9/1
N2 - Objective: To investigate the effects of intermittent passive standing (PS) and whole body vibration (WBV) on the electromyography (EMG) activity, cross-sectional area, and density of lower extremity muscles in individuals with chronic motor complete spinal cord injury (SCI). Design: Case series. Methods: Seven adult men with chronic (≥2 years), thoracic motor complete (AIS A-B) SCI completed a 40- week course of thrice-weekly intermittent PS-WBV therapy, in a flexed knee posture (160°), for 45 minutes per session at a frequency of 45 Hz and 0.6-0.7 mm displacement using the WAVE® Pro Plate, with an integrated EasyStand™ standing frame. EMG was measured in major lower extremity muscles to represent muscle activity during PS-WBV. The cross-sectional area and density of the calf muscles were measured using peripheral quantitative computed tomography at the widest calf cross-section (66% of the tibia length) at preand post-intervention. All measured variables were compared between the pre- and post-intervention measurements to assess change after the PS-WBV intervention. Results: PS-WBV acutely induced EMG activity in lower extremity muscles of SCI subjects. No significant changes in lower extremity EMG activity, muscle cross-sectional area, or density were observed following the 40-week intervention. Conclusions: Although acute exposure to PS-WBV can induce electrophysiological activity of lower extremity muscles during PS in men with motor complete SCI, the PS-WBV intervention for 40 weeks was not sufficient to result in enhanced muscle activity, or to increase calf muscle cross-sectional area or density.
AB - Objective: To investigate the effects of intermittent passive standing (PS) and whole body vibration (WBV) on the electromyography (EMG) activity, cross-sectional area, and density of lower extremity muscles in individuals with chronic motor complete spinal cord injury (SCI). Design: Case series. Methods: Seven adult men with chronic (≥2 years), thoracic motor complete (AIS A-B) SCI completed a 40- week course of thrice-weekly intermittent PS-WBV therapy, in a flexed knee posture (160°), for 45 minutes per session at a frequency of 45 Hz and 0.6-0.7 mm displacement using the WAVE® Pro Plate, with an integrated EasyStand™ standing frame. EMG was measured in major lower extremity muscles to represent muscle activity during PS-WBV. The cross-sectional area and density of the calf muscles were measured using peripheral quantitative computed tomography at the widest calf cross-section (66% of the tibia length) at preand post-intervention. All measured variables were compared between the pre- and post-intervention measurements to assess change after the PS-WBV intervention. Results: PS-WBV acutely induced EMG activity in lower extremity muscles of SCI subjects. No significant changes in lower extremity EMG activity, muscle cross-sectional area, or density were observed following the 40-week intervention. Conclusions: Although acute exposure to PS-WBV can induce electrophysiological activity of lower extremity muscles during PS in men with motor complete SCI, the PS-WBV intervention for 40 weeks was not sufficient to result in enhanced muscle activity, or to increase calf muscle cross-sectional area or density.
KW - Muscle
KW - Spinal cord injury
KW - Whole body vibration
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U2 - 10.1179/2045772314Y.0000000255
DO - 10.1179/2045772314Y.0000000255
M3 - Article
C2 - 25059652
AN - SCOPUS:84907428637
VL - 37
SP - 575
EP - 581
JO - Journal of Spinal Cord Medicine
JF - Journal of Spinal Cord Medicine
SN - 1079-0268
IS - 5
ER -