title: Medium term comparison of shock attenuating insoles using a spectral analysis technique.
abstract: In view of the current interest in skeletal shock and the damage it could cause, this paper illustrates the value of a new device for measuring shock transients reliably during gait. Four orthotic insoles were tested (Viscolas, PPT, Plastazote and Gait Aid) during walking on a timed oval course at intervals during 1 month using the J.P. Biomechanics Shock Meter. The 'shock factor' for each insole was recorded and the data show that Viscolas and Gait Aid do not appear to deteriorate in use whereas PPT and Plastazote do. Viscolas and PPT perform well; Viscolas is just superior; Plastazote (after 2 days) and Gait Aid both perform poorly. It is suggested that manufacturers should acknowledge the effect of use on the insole properties because this information is of paramount interest to the users of their products.
authors.affiliation: Orthotics and Disability Research Centre, Derbyshire Royal Infirmary, Derby, UK.
authors.forename: D J
authors.initials: DJ
authors.lastname: Pratt
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D004867:Equipment Design; D005260:Female; D005583:Fourier Analysis; D005684:Gait; D006801:Humans; D008297:Male; D008422:Materials Testing; D009989:Orthotic Devices; D012775:Shoes