scholarly journals Effects of Vibration Intensity, Exercise, and Motor Impairment on Leg Muscle Activity Induced by Whole-Body Vibration in People With Stroke

2015 ◽  
Vol 95 (12) ◽  
pp. 1617-1627 ◽  
Author(s):  
Lin-Rong Liao ◽  
Gabriel Y.F. Ng ◽  
Alice Y.M. Jones ◽  
Raymond C.K. Chung ◽  
Marco Y.C. Pang
Keyword(s):  
Muscle Activity ◽  
High Intensity ◽  
Whole Body Vibration ◽  
Motor Impairment ◽  
Chronic Stroke ◽  
Whole Body ◽  
Emg Activity ◽  
Body Vibration ◽  
Low Intensity ◽  
Leg Muscle

Background Whole-body vibration (WBV) has increasingly been used as an adjunct treatment in neurological rehabilitation. However, how muscle activation level changes during exposure to different WBV protocols in individuals after stroke remains understudied. Objective The purpose of this study was to examine the influence of WBV intensity on the magnitude of biceps femoris (BF) and tibialis anterior (TA) muscle activity and its interaction with exercise and with severity of motor impairment and spasticity among individuals with chronic stroke. Methods Each of the 36 individuals with chronic stroke (mean age=57.3 years, SD=10.7) performed 8 different static exercises under 3 WBV conditions: (1) no WBV, (2) low-intensity WBV (frequency=20 Hz, amplitude=0.60 mm, peak acceleration=0.96g), and (3) high-intensity WBV (30 Hz, 0.44 mm, 1.61g). The levels of bilateral TA and BF muscle activity were recorded using surface electromyography (EMG). Results The main effect of intensity was significant. Exposure to the low-intensity and high-intensity protocols led to a significantly greater increase in normalized BF and TA muscle electromyographic magnitude in both legs compared with no WBV. The intensity × exercise interaction also was significant, suggesting that the WBV-induced increase in EMG activity was exercise dependent. The EMG responses to WBV were similar between the paretic and nonparetic legs and were not associated with level of lower extremity motor impairment and spasticity. Limitations Leg muscle activity was measured during static exercises only. Conclusions Adding WBV during exercise significantly increased EMG activity in the TA and BF muscles. The EMG responses to WBV in the paretic and nonparetic legs were similar and were not related to degree of motor impairment and spasticity. The findings are useful for guiding the design of WBV training protocols for people with stroke.

Leg Muscle Activity during Whole-Body Vibration in Individuals with Chronic Stroke

2014 ◽  
Vol 46 (3) ◽  
pp. 537-545 ◽  
Author(s):  
LIN-RONG LIAO ◽  
FREDDY M. H. LAM ◽  
MARCO Y. C. PANG ◽  
ALICE Y. M. JONES ◽  
GABRIEL Y. F. NG
Keyword(s):  
Muscle Activity ◽  
Whole Body Vibration ◽  
Chronic Stroke ◽  
Whole Body ◽  
Body Vibration ◽  
Leg Muscle

scholarly journals Cardiovascular Stress Induced by Whole-Body Vibration Exercise in Individuals With Chronic Stroke

2015 ◽  
Vol 95 (7) ◽  
pp. 966-977 ◽  
Author(s):  
Lin-Rong Liao ◽  
Gabriel Y.F. Ng ◽  
Alice Y.M. Jones ◽  
Marco Y.C. Pang
Keyword(s):  
Blood Pressure ◽  
Oxygen Consumption ◽  
High Intensity ◽  
Whole Body Vibration ◽  
Chronic Stroke ◽  
Community Dwelling ◽  
Whole Body ◽  
Exercise Session ◽  
Body Vibration ◽  
Low Intensity

Background Although whole-body vibration (WBV) has sparked tremendous research interest in neurorehabilitation, the cardiovascular responses to WBV in people with stroke remain unknown. Objective The aim of this study was to determine the acute effects of different WBV protocols on oxygen consumption (V̇o2), heart rate (HR), rate of perceived exertion (RPE), blood pressure (BP), and rate-pressure product (RPP) during the performance of 6 different exercises among people with chronic stroke (time since onset ≥6 months). Design A repeated-measures design was used. Methods Each of the 48 participants experienced all 3 WBV protocols in separate sessions: (1) no WBV, (2) low-intensity WBV (peak acceleration=0.96 unit of gravity of Earth [g]), and (3) high-intensity WBV (1.61g). The order in which they encountered the WBV protocols was randomized, as was the order of exercises performed during each session. Oxygen consumption, HR, and RPE were measured throughout the study. Blood pressure and RPP were measured before and after each session. Results Low-intensity and high-intensity WBV induced significantly higher V̇o2 by an average of 0.69 and 0.79 mL/kg/min, respectively, compared with the control condition. These protocols also increased HR by an average of 4 bpm. The 2 WBV protocols induced higher RPE than the control condition during static standing exercise only. Although the diastolic and systolic BP and RPP were increased at the end of each exercise session, the addition of WBV had no significant effect on these variables. Limitations The results are generalizable only to ambulatory and community-dwelling people with chronic stroke. Conclusions Addition of high- and low-intensity WBV significantly increased the V̇o2 and HR, but the increase was modest. Thus, WBV should not pose any substantial cardiovascular hazard in people with chronic stroke.

scholarly journals WHOLE-BODY-VIBRATION--INDUCED INCREASE IN LEG MUSCLE ACTIVITY DURING DIFFERENT SQUAT EXERCISES

2006 ◽  
Vol 20 (1) ◽  
pp. 124-129 ◽  
Author(s):  
MACHTELD ROELANTS ◽  
SABINE M.P. VERSCHUEREN ◽  
CHRISTOPHE DELECLUSE ◽  
ORON LEVIN ◽  
VALÉRE STIJNEN
Keyword(s):  
Muscle Activity ◽  
Whole Body Vibration ◽  
Whole Body ◽  
Body Vibration ◽  
Leg Muscle

scholarly journals Whole-Body-Vibration–Induced Increase in Leg Muscle Activity During Different Squat Exercises

2006 ◽  
Vol 20 (1) ◽  
pp. 124 ◽  
Author(s):  
Machteld Roelants ◽  
Sabine M.P. Verschueren ◽  
Christophe Delecluse ◽  
Oron Levin ◽  
Valère Stijnen
Keyword(s):  
Muscle Activity ◽  
Whole Body Vibration ◽  
Whole Body ◽  
Body Vibration ◽  
Leg Muscle

The effects of whole-body vibration on upper- and lower-body EMG during static and dynamic contractions

2007 ◽  
Vol 32 (6) ◽  
pp. 1156-1163 ◽  
Author(s):  
Tom J. Hazell ◽  
Jennifer M. Jakobi ◽  
Kenji A. Kenno
Keyword(s):  
Muscle Activity ◽  
Muscle Activation ◽  
Biceps Brachii ◽  
Vastus Lateralis ◽  
Whole Body Vibration ◽  
Stimulus Frequency ◽  
Whole Body ◽  
Emg Activity ◽  
Lower Body ◽  
Body Vibration

Whole-body vibration (WBV) training uses a vertically oscillating platform and reports suggest that this perturbation elicits reflexive muscle contractions that augment muscle activity and contribute to increased strength. No WBV study has measured both upper- and lower-body muscle activation. The purpose of this study was to determine the optimal WBV stimulus (frequency × amplitude) to increase electromyography (EMG) in upper- and lower-body muscles for three distinctive unloaded actions: isometric semi-squat, dynamic leg squats, and static and dynamic bilateral bicep curls. Surface EMG was measured for the vastus lateralis (VL), biceps femoris (BF), biceps brachii (BB), and triceps brachii (TB) in 10 recreationally active male university students (24.4 ± 2.0 years; mean ± SD) when WBV was administered at 2 and 4 mm and at 25, 30, 35, 40, and 45 Hz. EMG changes are reported as the difference between WBV and no WBV EMG root mean square expressed as a percentage of maximum voluntary exertion (%MVE). In static semi-squat, WBV increased muscle activity 2.9%–6.7% in the VL and 0.8%–1.2% in the BF. During dynamic squatting, WBV increased muscle activity in the VL by 3.7%–8.7% and in the BF by 0.4%–2.0%. In a static biceps curl, WBV had no effect on BB EMG, but did increase TB activity 0.3%–0.7%. During dynamic biceps curls, WBV increased BB EMG activity by 0.6%–0.8% and TB activity by 0.2%–1.0%. The higher WBV amplitude (4 mm) and frequencies (35, 40, 45 Hz) resulted in the greatest increases in EMG activity.

Effects of Whole Body Vibration on the Horse: Actual Vibration, Muscle Activity, and Warm-up Effect

2017 ◽  
Vol 51 ◽  
pp. 54-60 ◽  
Author(s):  
Heinz Hans Florian Buchner ◽  
Lisa Zimmer ◽  
Louisa Haase ◽  
Justine Perrier ◽  
Christian Peham
Keyword(s):  
Muscle Activity ◽  
Whole Body Vibration ◽  
Whole Body ◽  
Warm Up ◽  
Body Vibration
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