Exposure to foot-transmitted vibration (FTV) can lead to pain and numbness in the toes and feet, increased cold sensitivity, blanching in the toes, and joint pain. Prolonged exposure can result in a clinical diagnosis of vibration-induced white foot (VIWFt). Data on the biomechanical
response of the feet to FTV is limited; therefore, this study seeks to identify resonant frequencies for different anatomical locations on the human foot, while standing in a natural position. A laser Doppler vibrometer was used to measure vertical (z-axis) vibration on 21 participants at
24 anatomical locations on the right foot during exposure to a sine sweep from 10–200 Hz with a peak vertical velocity of 30 mm/s. The most notable differences in the average peak frequency occur between the toes (range: 99–147 Hz), midfoot (range: 51–84 Hz)
and ankle (range: 16–39 Hz).
Practitioner Summary: The biomechanical response of the human foot exposed to foot-transmitted vibration, when standing in a natural position, was measured for 21 participants. The foot does not respond uniformly; the toes, midfoot, and ankle
regions need to be considered independently in future development of isolation strategies and protective measures.
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Document Type: Research Article
Bharti School of Engineering, Laurentian University, Sudbury, Canada;
Department of Mechanics, Politecnico di Milano, Lecco, Italy;
Centre for Research in Occupational Safety and Health, Laurentian University, Sudbury, Canada;
May 4, 2019
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