Low resonance frequency vibration affects strength of paretic and non-paretic leg differently in patients with stroke

J. Tihanyi, R. Di Giminiani, T. Tihanyi, G. Gyulai, L. Trzaskoma, M. Horváth

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The objective of the study was to investigate the chronic effect of low frequency whole body vibration (WBV) on isometric and eccentric strength of knee extensors with different force exertion capacity. It was hypothesized that (1) four-week WBV intervention with the low frequency domain would enhance muscle strength and (2) the improvement would be more pronounced in the weaker muscle. To test our hypothesis twenty patients with acute stroke were recruited. Ten patients were randomly assigned to vibration and the remaining ten patients served for control.The patients in the vibration group received WBV with 20 Hz frequency three times per week standing on a vibration platform in half squat position meanwhile flexing and extending the joints and placing the weight from one leg to the other. Knee extensor strength was determined under isometric and eccentric contraction before and after WBV intervention. Myoelectrical activity (EMG) of the vastus lateralis muscle was also measured.Significant improvement was revealed in the vibration group only. The maximum isometric torque and EMG activity increased significantly for both paretic and non-paretic leg, but the improvement was threefold greater in the vibration group. No significant alteration was found in rate of torque development. Maximum eccentric torque and EMG increased significantly for the paretic leg only. Mechanical work enhanced significantly in the paretic side only.The results of our study indicate that the selection of the effective vibration frequency depends upon the physical condition of neuromuscular system. Low vibration frequency intervention can increase the strength in weak muscles due to neuromuscular impairment and restricted physical activity.

Original languageEnglish
Pages (from-to)172-182
Number of pages11
JournalActa Physiologica Hungarica
Volume97
Issue number2
DOIs
Publication statusPublished - Jun 1 2010

Fingerprint

Vibration
Leg
Stroke
Torque
Muscles
Knee
Isometric Contraction
Quadriceps Muscle
Muscle Strength
Joints
Exercise
Weights and Measures

Keywords

  • chronic effect
  • EMG
  • isometric and eccentric contraction
  • knee extensor strength
  • knee extensors
  • patients with stroke
  • vastus lateralis muscle
  • whole body vibration

ASJC Scopus subject areas

  • Physiology (medical)

Cite this

Low resonance frequency vibration affects strength of paretic and non-paretic leg differently in patients with stroke. / Tihanyi, J.; Di Giminiani, R.; Tihanyi, T.; Gyulai, G.; Trzaskoma, L.; Horváth, M.

In: Acta Physiologica Hungarica, Vol. 97, No. 2, 01.06.2010, p. 172-182.

Research output: Contribution to journalArticle

Tihanyi, J. ; Di Giminiani, R. ; Tihanyi, T. ; Gyulai, G. ; Trzaskoma, L. ; Horváth, M. / Low resonance frequency vibration affects strength of paretic and non-paretic leg differently in patients with stroke. In: Acta Physiologica Hungarica. 2010 ; Vol. 97, No. 2. pp. 172-182.
@article{a5db2c5040414509b60d891df73f62ea,
title = "Low resonance frequency vibration affects strength of paretic and non-paretic leg differently in patients with stroke",
abstract = "The objective of the study was to investigate the chronic effect of low frequency whole body vibration (WBV) on isometric and eccentric strength of knee extensors with different force exertion capacity. It was hypothesized that (1) four-week WBV intervention with the low frequency domain would enhance muscle strength and (2) the improvement would be more pronounced in the weaker muscle. To test our hypothesis twenty patients with acute stroke were recruited. Ten patients were randomly assigned to vibration and the remaining ten patients served for control.The patients in the vibration group received WBV with 20 Hz frequency three times per week standing on a vibration platform in half squat position meanwhile flexing and extending the joints and placing the weight from one leg to the other. Knee extensor strength was determined under isometric and eccentric contraction before and after WBV intervention. Myoelectrical activity (EMG) of the vastus lateralis muscle was also measured.Significant improvement was revealed in the vibration group only. The maximum isometric torque and EMG activity increased significantly for both paretic and non-paretic leg, but the improvement was threefold greater in the vibration group. No significant alteration was found in rate of torque development. Maximum eccentric torque and EMG increased significantly for the paretic leg only. Mechanical work enhanced significantly in the paretic side only.The results of our study indicate that the selection of the effective vibration frequency depends upon the physical condition of neuromuscular system. Low vibration frequency intervention can increase the strength in weak muscles due to neuromuscular impairment and restricted physical activity.",
keywords = "chronic effect, EMG, isometric and eccentric contraction, knee extensor strength, knee extensors, patients with stroke, vastus lateralis muscle, whole body vibration",
author = "J. Tihanyi and {Di Giminiani}, R. and T. Tihanyi and G. Gyulai and L. Trzaskoma and M. Horv{\'a}th",
year = "2010",
month = "6",
day = "1",
doi = "10.1556/APhysiol.97.2010.2.3",
language = "English",
volume = "97",
pages = "172--182",
journal = "Physiology International",
issn = "2498-602X",
publisher = "Akademiai Kiado",
number = "2",

}

TY - JOUR

T1 - Low resonance frequency vibration affects strength of paretic and non-paretic leg differently in patients with stroke

AU - Tihanyi, J.

AU - Di Giminiani, R.

AU - Tihanyi, T.

AU - Gyulai, G.

AU - Trzaskoma, L.

AU - Horváth, M.

PY - 2010/6/1

Y1 - 2010/6/1

N2 - The objective of the study was to investigate the chronic effect of low frequency whole body vibration (WBV) on isometric and eccentric strength of knee extensors with different force exertion capacity. It was hypothesized that (1) four-week WBV intervention with the low frequency domain would enhance muscle strength and (2) the improvement would be more pronounced in the weaker muscle. To test our hypothesis twenty patients with acute stroke were recruited. Ten patients were randomly assigned to vibration and the remaining ten patients served for control.The patients in the vibration group received WBV with 20 Hz frequency three times per week standing on a vibration platform in half squat position meanwhile flexing and extending the joints and placing the weight from one leg to the other. Knee extensor strength was determined under isometric and eccentric contraction before and after WBV intervention. Myoelectrical activity (EMG) of the vastus lateralis muscle was also measured.Significant improvement was revealed in the vibration group only. The maximum isometric torque and EMG activity increased significantly for both paretic and non-paretic leg, but the improvement was threefold greater in the vibration group. No significant alteration was found in rate of torque development. Maximum eccentric torque and EMG increased significantly for the paretic leg only. Mechanical work enhanced significantly in the paretic side only.The results of our study indicate that the selection of the effective vibration frequency depends upon the physical condition of neuromuscular system. Low vibration frequency intervention can increase the strength in weak muscles due to neuromuscular impairment and restricted physical activity.

AB - The objective of the study was to investigate the chronic effect of low frequency whole body vibration (WBV) on isometric and eccentric strength of knee extensors with different force exertion capacity. It was hypothesized that (1) four-week WBV intervention with the low frequency domain would enhance muscle strength and (2) the improvement would be more pronounced in the weaker muscle. To test our hypothesis twenty patients with acute stroke were recruited. Ten patients were randomly assigned to vibration and the remaining ten patients served for control.The patients in the vibration group received WBV with 20 Hz frequency three times per week standing on a vibration platform in half squat position meanwhile flexing and extending the joints and placing the weight from one leg to the other. Knee extensor strength was determined under isometric and eccentric contraction before and after WBV intervention. Myoelectrical activity (EMG) of the vastus lateralis muscle was also measured.Significant improvement was revealed in the vibration group only. The maximum isometric torque and EMG activity increased significantly for both paretic and non-paretic leg, but the improvement was threefold greater in the vibration group. No significant alteration was found in rate of torque development. Maximum eccentric torque and EMG increased significantly for the paretic leg only. Mechanical work enhanced significantly in the paretic side only.The results of our study indicate that the selection of the effective vibration frequency depends upon the physical condition of neuromuscular system. Low vibration frequency intervention can increase the strength in weak muscles due to neuromuscular impairment and restricted physical activity.

KW - chronic effect

KW - EMG

KW - isometric and eccentric contraction

KW - knee extensor strength

KW - knee extensors

KW - patients with stroke

KW - vastus lateralis muscle

KW - whole body vibration

UR - http://www.scopus.com/inward/record.url?scp=77954484947&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77954484947&partnerID=8YFLogxK

U2 - 10.1556/APhysiol.97.2010.2.3

DO - 10.1556/APhysiol.97.2010.2.3

M3 - Article

C2 - 20511126

AN - SCOPUS:77954484947

VL - 97

SP - 172

EP - 182

JO - Physiology International

JF - Physiology International

SN - 2498-602X

IS - 2

ER -