نتایج جستجو برای: body vibration

تعداد نتایج: 779469  

Journal: :Ergonomics 2010
William D R Baker Neil J Mansfield

Standing people are exposed to whole-body vibration in many environments. This paper investigates the effects of horizontal whole-body vibration and standing posture on task performance. Sixteen participants were exposed to random vibration (up to 4 Hz) whilst performing a timed pegboard task in two standing postures. Objective and subjective indicators of performance were used. Time taken to c...

Journal: :Age and ageing 2015
Heather Corrie Katherine Brooke-Wavell Neil J Mansfield Alison Cowley Robert Morris Tahir Masud

BACKGROUND whole-body vibration training may improve neuromuscular function, falls risk and bone density, but previous studies have had conflicting findings. OBJECTIVE this study aimed to evaluate the influence of vertical vibration (VV) and side-alternating vibration (SV) on musculoskeletal health in older people at risk of falls. DESIGN single-blind, randomised, controlled trial comparing...

Background and purpose: Vibration caused by ventilation systems in buildings is one of the harmful physical factors that can cause harm to residents. Therefore, measuring and controlling vibration is important. Materials and Methods:  In the first step of the study, the vibration accelerometer was placed on the base of a fan where the vibrations were sent toward the duct wall. A vibration asse...

Journal: :Journal of strength and conditioning research 2013
Pedro J Marín Azael J Herrero John G Milton Tom J Hazell David García-López

Whole-body vibration (WBV) training has exercisers perform static and dynamic resistance training exercises on a ground-based platform. Exposure to WBV exposure has demonstrated benefits and no effect on lower body strength, power, and performance. The aim of this study was to determine if WBV exposure (50 Hz, 2.51 mm) has any potentiating effects postexercise by measuring the kinematic variabl...

ژورنال: مجله طب نظامی 2020

Background and Aim: Little attention has been paid to the effects of combined exposure to noise and vibration. Exposure to noise and vibration can effect stress hormones and may lead to high blood pressure and cardiovascular disorders. This study aims to investigate the effects of noise and vibration on urinary Metanephrine and Normetanephrine among men. Methods: In this experimental study, 30 ...

Journal: :Journal of sports science & medicine 2004
Brendan Humphries Geoff Warman Jason Purton Tim L A Doyle Eric Dugan

At present there appears to be a need for research conducted on the effects of vibration on the contractile ability of skeletal muscle tissue. The aim of this study was to address this issue by examining the effects of a superimposed muscle/tendon vibration at 50.42±1.16 Hz (acceleration 13.24 ± 0.18ms(-2): displacement ≈5mm) on muscular activation and maximal isometric contraction. Sixteen par...

Background. Fatigue has an undesirable effect on the continued exercise performance and decreases athlete's activity. Fast lactic acid disposed is high of importance for athletes. Objectives. Therefore, the present article determines the effects of the different frequencies of whole-body vibration after a strenuous activity on blood lactic acid. Methods. 60 athletes were chosen from sel...

Journal: :American journal of physical medicine & rehabilitation 2004
Ilse J W van Nes Alexander C H Geurts Henk T Hendricks Jacques Duysens

The short-term effects of whole-body vibration as a novel method of somatosensory stimulation on postural control were investigated in 23 chronic stroke patients. While standing on a commercial platform, patients received 30-Hz oscillations at 3 mm of amplitude in the frontal plane. Balance was assessed four times at 45-min intervals with a dual-plate force platform, while quietly standing with...

2011
G. Sica J. Woodcock E. Peris Z. Koziel A. Moorhouse D. Waddington

The University of Salford has derived an exposure-response relationship for vibration in residential environments. Vibration measurements have been used for assessing the human exposure alongside a social study questionnaire based on face-to-face interviews for quantifying the human response. This paper deals with the exposure side of the study. In order to cover the wide range of exposures aff...

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