Presentation Mark Lake.pdf

The use of plantar pressure measurements in foot function and footwear research In C. Payton (ed.). Biomechanical evaluation of movement (2008) Dr. Mark Lake Liverpool John Moores University, U.K. Overview ? The importance of sampling rate – Links to high speed kinematics – Links to risk of injury – Links to characterising the foot ? Also spatial resolution can be important – Soccer boot research – Kinetics of sprinting ? New applications – Dynamic balance and stability using moving platform Sampling rate can be important Biomechanical variables linked with injury risk from prospective studies Stress fractures in the military: Irene Davis et al., University of Deleware. Found that tibial shock and ‘free’ moment measures from the force platform were the best predictors of the injured group. RSscan International The footscan plate is bild togeter 3m EVA + footscan plate + 2m EVA Tine Willems et al. (2005) Pressure mat variables were among the most predictive for risk of lower leg pain. Increased medial pressure in the forefoot and increased lateral roll-off. Also, Youri Thijs, Ph.D. presentation: velocity of pressure transitions Plantar pressure profile: barefoot running Time (ms) V e r t i c a l F o r c e ( N ) * * * * High speed 3D kinematics Predicting the rate of internal rotation of the tibia Recording plantar loading at high sampling rates allows the potential to predict rapid movement characteristics of foot and leg. The primary causes of many running injuries remain to be established Certain knee injuries and other chronic lower limb problems have been linked to excessive magnitudes or rates of internal rotation of the tibia just after ground impact (Bellchamber and van den Bogert, 2000; McClay and Manal, 1997) Barefoot Shod Insole Pressure Interfaces (500Hz) Coupled, rapid movements of the foot and tibia to attenuate loads. Rates of movement very likely to be important – need for high speed data capture In addition, transvers