Title: Transmission of whole body vibration and its effect on muscle activation
Authors: Tankisheva-Stoykova, Ekaterina
Jonkers, Ilse
Boonen, Steven
Delecluse, Christophe
van Lenthe, Harry
Druyts, Hans
Spaepen, Pieter
Verschueren, Sabine # ×
Issue Date: Sep-2013
Publisher: National Strength and Conditioning Association
Series Title: Journal of Strength and Conditioning Research vol:27 issue:9 pages:2533-2541
Abstract: The aim of current study was to measure the transmission of whole-body vibration through the entire body and to relate this to body posture and induced muscular activation. Eight clinically healthy subjects performed 3 static body postures-high squat (135°), deep squat (110°), and erect stance, whereas vibration transmission was assessed over a wide range of accelerations (from 0.33 to 7.98 g) and frequencies (from 30 to 50 Hz). To assess the vibration transmission, 9 triaxial accelerometers were attached from the ankle up to the head and the root mean square of acceleration signal of each site-specific body point was calculated. Additionally, muscle activity from 7 lower limb muscles was recorded. The results showed a significant attenuation of the platform accelerations transmitted from the feet to the head. Compared with erect stance, knee bent posture significantly diminished vibration transmission at the hip, spine, and the head (p < 0.05). Vibration transmission to the spine was significantly lower in deep vs. high squat (p < 0.05), suggesting that further knee bending may reduce the risk of overloading the spine. Vibration increased the muscle activity in most leg and hip muscles during both squat postures, although, on average, no clear dose-response relationship between the acceleration and/or frequency and muscle response was found. The muscular activation of vastus medialis and rectus femoris showed clear negative correlation to the vibration transmission at the sternum. The specific vibration parameters used in the present study can be considered as safe and suitable for a training program. Moreover, the present results contribute to optimize the most advantageous whole-body vibration protocol and to determine the beneficial effects on muscle and bone.
ISSN: 1064-8011
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Research Group for Musculoskeletal Rehabilitation
Human Movement Biomechanics Research Group
Gerontology and Geriatrics
Physical Activity, Sports & Health Research Group
Biomechanics Section
Technologiecluster Werktuigkundige Industriƫle Ingenieurstechnieken
Mechanical Engineering Technology TC, Technology Campus Geel
× corresponding author
# (joint) last author

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