heel height
and cognitive process ( Shumway-Cook & Horak , 1986 ). Experienced wearers were found to adapt to walking regularity more flexibly under cognitive load than HHS novices ( Schaefer & Lindenberger , 2013 ). Significant different muscle efforts were exerted in HHS experts compared with novices ( Stefanyshyn et al ., 2000 ). Studies have shown that wearing experience can influence the ankle ROM and muscle strength . A more supinated position was found in HHS experts compared with novices . The higher ankle ROM of inversion and plantarflexion might affect efficient force conduction on foot arch and increase the risk of anterior talofibular ligament sprains in experienced HHS wearer ( Ebbeling , Hamill & Crussemeyer , 1994 ; Kim , Lim & Yoon , 2013 ). The long-term adaptation of the supinated position in HHS experts would shorten the length of muscle fibers , decrease the amount of cross
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