Resumo

ALVAREZ, Michelín et al. Effect of posture and shoe use on vibration transmission to ankle, knee and hip during whole-body vibration. Rev.fac.ing.univ. Antioquia [online]. 2010, n.53, pp.135-144. ISSN 0120-6230.

Whole-body vibration (WBV) is a novel therapy that has been under study as a therapeutic intervention. Vibration stimuli exert positive effects on leg strength, bone mineral density, and blood irrigation. However, an effective range of vibration parameters has not yet been determined, and a number of previous studies report controversial results. Dissimilarities could be partially resolved if the real stimuli magnitude is known, but to date, studies have not presented data regarding effective vibration intensity received at a specific training site. This study focuses on vibration magnitude and transmissibility assessment at the ankle, knee, and hip, and evaluates the influence of shoes, posture, and vibration frequency on the amount of stimuli transmitted to the body. We designed a measurement system to evaluate vibration transmission. Vibration magnitude assessment at each body zone was obtained from eight young healthy subjects. Results indicate that shoe use is an important variable in vibration damping, although there was important intersubject variability, participant posture modification during vibration exposure resulted in different vibration doses among subjects.

Palavras-chave : acceleration; stimuli; vibration.

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