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

Seung-Hyun Hyun1, Che-Cheong Ryew1

  • 1Department of Kinesiology, College of Natural Science, Jeju National University, Jeju, Korea.

Insights

Wearing high heels while carrying an infant alters leg mechanics, increasing leg stiffness and forces. This posture change may enhance stability but could lead to fatigue and increased fall risk.

Area of Science:

  • Biomechanics
  • Human Movement Analysis
  • Ergonomics

Background:

  • High heels and carrying infants individually affect the center of gravity.
  • The combined effect on leg mechanics, particularly leg stiffness, during gait is not well understood.

Purpose of the Study:

  • To investigate the interaction effect of carrying an infant using a hip seat carrier on leg mechanics during high heel gait.
  • To analyze changes in ground reaction forces, center of pressure, and leg stiffness.

Main Methods:

  • Nine adult females and nine infants participated.
  • Infants were positioned on the rear of the trunk while participants wore 6 cm high heel shoes.
  • Leg mechanics were analyzed using ground reaction force variables, extrapolated center of mass (XCoM) theta, and leg stiffness.

Main Results:

  • Carrying an infant in high heels significantly increased the first and second peak vertical forces (PVF) and leg stiffness compared to normal gait.
  • Medial-lateral center of pressure and XCoM theta were decreased.
  • The combined condition induced postural adjustments for stability, potentially reducing impulse.

Conclusions:

  • High heel gait combined with carrying an infant may lead to accumulated leg fatigue and an increased risk of falling injuries.
  • Understanding these biomechanical mechanisms is crucial for clinicians and exercise rehabilitation specialists to develop appropriate exercise guidelines.

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