Effect of slipper wearing and carrying positions of infant on dynamic stability and kinetic variable during level walking

Abstract

Recently though various hip seats for carrying infant of women was designed and developed, then, wearing slipper may restrain the movement of bare foot. The study was undertaken to investigate the dynamic stability and kinetic variables according to between position of carrying infant and wearing slipper. Adult female (n=10) and under one year age of infant (n=10) participated in the study. Extrapolated center of mass, center of pressure, ground reaction force (GRF), and leg stiffness of gait characteristics using 3-dimensional cinematography and GRF were analyzed. Dynamic stability according to position of carrying infant and wearing slipper was not significant. While when carried an infant against normal gait showed significant difference in breaking force, leg stiffness and loading rate (P<0.001). Of which breaking force and vertical impulse were more increased when the back-carried against fore-carried of trunk. Thus it resulted in transformation on types of impulse transfer to leg and COG of women’s carrying infant, which may be strategy for securing a dynamic stability. Therefore experts related with exercise rehabilitation should understand sufficiently on gait characteristics of women with diseases on muscular-skeletal system and perform effective rehabilitation and treatment.

Effect of lower limb kinetic on carrying infant by hip seat carrier during high heel gait

“…When compared main effect on carrying infant during gait of women, carrying infant more increased 1st PVF, 2nd PVF, and leg stiffness than normal gait, and decreased medial-lateral COP, which was due to added weight of infant and was similar with result of Ryew and Hyun (2018) which increased impulse type during carrying infant.…”

“…Thus human can adapt various surface environments with bipedal gait, but backpacking of bag and carrier in condition of increased velocity of COG before foot breaking may cause falling injury with difficulty of counteraction of angular momentum (Ko et al, 2017). Particularly women after baby delivering frequently carries an infant on baby carrier, type of which modifies impulse type transferring to leg and COG through increasing of load rate, leg stiffness, maximum vertical GRF and anterior-posterior GRF (Ryew and Hyun, 2018).…”