Research on quality of life detailed by scientists at Wyle Laboratories, Inc.
2007 NOV 13 -- A report, 'Vibration exposure and biodynamic responses during whole-body vibration training,' is newly published data in Medicine and Science In Sports & Exercise. "Excessive, chronic whole-body vibration (WBV) has a number of negative side effects on the human body, including disorders of the skeletal, digestive, reproductive, visual, and vestibular systems. Whole-body vibration training (WBVT) is intentional exposure to WBV to increase leg muscle strength, bone mineral density, health-related quality of life, and decrease back pain," scientists in the United States report. "The purpose of this study was to quantitatively evaluate vibration exposure and biodynamic responses during typical WBVT regimens Healthy men and women (N=16) were recruited to perform slow, unloaded squats during WBVT (30 Hz; 4 mm(p-p)), during which knee flexion angle (KA), mechanical impedance, head acceleration (Ha(rms)), and estimated vibration dose value (eVDV) were measured. WBVT was repeated using two forms of vibration: 1) vertical forces to both feet simultaneously (VV), and 2) upward forces to only one foot at a time (RV) Mechanical impedance varied inversely with KA during RV (effect size, eta(p)(2): 0.668, p<0.01) and VV (eta(p)(2): 0.533, p<0.05). Ha(rms) varied with KA (eta(p)(2): 0.686, p<0.01) and is greater during VV than during RV at all KA (p <0.01). The effect of KA on Ha(rms) is different for RV and VV (eta(p)(2): 0.567, p<0.05). The eVDV associated with typical RV and VV training regimens (30 Hz, 4 mm(p-p), 10 min.d(-1)) exceeds the recommended daily vibration exposure as defined by ISO 2631-1 (p <0.01) ISO standards indicate that 10 min.d(-1) WBVT is potentially harmful to the human body; the risk of adverse health effects may be lower during RV than VV and at half-squats rather than full-squats or upright stance," wrote A.F. Abercromby and colleagues, Wyle Laboratories, Inc. The researchers concluded: "More research is needed to explore the long-term health hazards of WBVT." Abercromby and colleagues published their study in Medicine and Science In Sports & Exercise (Vibration exposure and biodynamic responses during whole-body vibration training. Medicine and Science In Sports & Exercise, 2007;39(10):1794-800). For additional information, contact A.F. Abercromby, Wyle Laboratories, Inc., Houston, TX 77058 USA.. The publisher's contact information for the journal Medicine and Science In Sports & Exercise is: Lippincott Williams & Wilkins, 530 Walnut St., Philadelphia, PA 19106-3621, USA. Keywords: United States, Houston, Quality of Life. This article was prepared by Life Science Weekly editors from staff and other reports. Copyright 2007, Life Science Weekly via NewsRx.com.
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