PNF and Movement 2022; 20(1): 19-29
Comparison of Kinematic Data during Walking between Healthy People and Persons with Mild Intellectual Disability
Da-Hyeon Jin, P.T., B.S.⋅Young-In Hwang, PT, Ph.D1.
Department of Physical Therapy, Graduate School, Hoseo University
1Department of Physical Therapy, College of Life and Health Science,
Smart Healthcare Convergence Research Center, Hoseo University
Correspondence to: Young-In Hwang (
Received: December 9, 2021; Revised: January 9, 2022; Accepted: January 17, 2022; Published online: April 30, 2022.
© Korea Proprioceptive Neuromuscular Facilitation Association. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Purpose: The purpose of this study was to analyze the gait patterns of adults with intellectual disability and healthy adults based on collected kinematic data on the lower extremities and to investigate the gait patterns of intellectually disabled people by comparing the differences between the two groups.
Methods: The participants were divided into in one group of healthy adults (n = 9) and one group with mild intellectual disabilities (n = 9). 3D motion analysis (Myomotion) was used to collect kinematic data from each group while the participants walked 3 times over 10 m. As a statistical method, each group’s kinematic data during walking was analyzed and compared using an independent sample t-test.
Results: Comparing the kinematic data of the lower extremities during walking between the group with mild intellectual disability and the healthy group, there were significant differences between the two groups in the hip and ankle joints in the stance and swing phases.
Conclusion: The analysis suggests that people with intellectual disabilities have kinematic differences compared with healthy people. Based on the results of this study, it is necessary to conduct further research on rehabilitation programs for joint stabilization, exercise for increasing joint range of motion, muscle strengthening exercise, and proprioception training for people with intellectual disabilities with insufficient physical function.
Keywords: Gait pattern, Intellectual disability, Kinematic data

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