The modified gait patterns during stepping on slippery floor

Upon encountering a wet or contaminated floor, people often modify their ga it and posture to prevent themselves from slipping. This study was conducte d to investigate the modification of gait patterns in healthy young adults as they approached and stepped on a slippery floor. Ten females and twelve males were instructed to walk at two different pacer speeds, 90 and 120step s/min, guided by a metronome, on a walkway with two forceplates placed at t he center. During the step immediately prior to stepping on a forceplate wi th or without slippery disturbance, temporo-spatial parameters, selected ki nematic parameters, and foot-floor reaction forces were evaluated in each c adence. The results showed that modifications of gait patterns for slip per turbation included shorter step length, increases of flexion angles of hip and knee joints, increases of plantarflexion angles of ankle joint with fla ttened foot, and decreases of the forward and backward ground reaction forc es. However, it was found that such modifications for slip perturbation did not seem to efficiently prevent people from falling.