Yong-Jun Cha

Dr. Yong-Jun Cha

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Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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29 July 2013 in Clinical Rehabilitation
Verified
Journal Article
Closed access
HLHye Young Lee
Hye Young Lee
YCYong-Jun Cha
Yong-Jun Cha
Kyoung KimKyoung Kim
Kyoung Kim
To investigate the effect of feedback respiratory training on pulmonary function of children with cerebral palsy. Randomized controlled experimental study. Outpatient rehabilitation hospital. Twenty-two children with cerebral palsy were randomly assigned to two groups: the experimental group (feedback respiratory training) and the control group. Feedback respiratory training and comprehensive rehabilitation therapy were performed by children in the experimental group. Comprehensive rehabilitation therapy was performed by children in the control group. Children in both groups received training three times per week for a period of four weeks. Forced vital capacity, forced expiratory volume at one second, peak expiratory flow, vital capacity, tidal volume, inspiratory reserve volume and expiratory reserve volume were assessed before and after four weeks training period. Significant improvements in pulmonary function were observed after training in the experimental group (P < 0.05). Greater gains were observed in the experimental group than in the control group (P < 0.05). Values of forced vital capacity increased by 50%, forced expiratory volume at one second increased by 40% as a result of training in the experimental group. The control group showed no significant changes in pulmonary function after training (P > 0.05). Participation in feedback respiratory training resulted in improvement of pulmonary function of children with cerebral palsy.

3 August 2017 in Journal of Back and Musculoskeletal Rehabilitation
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Journal Article
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MKMi-Sun Kim
Mi-Sun Kim
YCYong-Jun Cha
Yong-Jun Cha
JCJongduk Choi
Jongduk Choi
BACKGROUND: Forward head posture (FHP) causes changes in the strengths and rigidities of cervical muscles. OBJECTIVE: The aim of this study was to investigate correlations between FHP and respiratory functions and the muscle activities of respiratory accessory muscles in young adults in their 20s. METHODS: A volunteer sample of 33 healthy young adults participated in this study. Craniovertebral angle (CVA), cranial rotational angle (CRA), vital capacity (VC), forced vital capacity (FVC), forced expiratory volume at 1 second (FEV1), peak expiratory flow (PEF), maximal voluntary ventilation (MVV), and sternocleidomastoid (SCM) and upper trapezius activity ratios were measured. RESULTS: Significant positive correlations were found between CVA and VC, FVC, FEV1, PEF, and MVV, and a significant negative correlation was found between CVA and SCM activity ratio. Significant negative correlations existed between CRA and VC and FVC, and significant positive correlations between CRA and SCM and upper trapezius activity ratios. CONCLUSION: FHP may act to lower respiratory functions, and thus, the maintenance of correct head posture is required to prevent such functional reductions.


1 January 2013 in Journal of Physical Therapy Science
Verified
Journal Article
Closed access
DYDoo Han Yoo
Doo Han Yoo
YCYong-Jun Cha
Yong-Jun Cha
SKSu Kyoung Kim
Su Kyoung Kim
JLJae-Shin Lee
Jae-Shin Lee

9 November 2017 in Assistive Technology
Verified
Journal Article
Closed access
YCYoon-Hee Choi
Yoon-Hee Choi
JKJung-Doo Kim
Jung-Doo Kim
JLJun-Ho Lee
Jun-Ho Lee
YCYong-Jun Cha
Yong-Jun Cha
This study examined whether the walking and balance ability of adult patients with chronic hemiplegic stroke are associated differentially with the degree of gain after two types of gait intervention. Twenty-four subjects with hemiplegic stroke were enrolled in this randomized study. Each subject participated in one of two gait intervention strategies: gait training with auditory feedback caused by active weight bearing on the paralyzed side (experimental group; EG), or general gait intervention over the ground (control group; CG). The walking and balance abilities were assessed before and after gait intervention. Significant improvements in the 10-m walking test, functional gait assessment (FGA) score, and center of pressure (COP) path length were observed after gait training in both groups (p < 0.05). The EG showed a larger increase in the 10-m walking test, FGA score, and COP path length in the state of eyes opened and closed than the CG (18.2%, 27.0%, 24.8%, and 18.2%, respectively). The auditory feedback caused by active weight bearing on the paralyzed side appeared to be a more effective approach for improving the walking and balance ability in adult patients with hemiplegic stroke during walking training than general gait intervention.

1 January 2015 in Journal of Physical Therapy Science
Verified
Journal Article
Open access
NKNan-Hyang Kim
Nan-Hyang Kim
YCYong-Jun Cha
Yong-Jun Cha
[Purpose] The purpose of the present study was to examine the effect of intensive gait training using a constrained induced movement therapy (CIMT) technique applied to the non-paretic upper extremity on the balance ability of stroke patients. [Subjects and Methods] Twenty stroke patients were randomly assigned to an experimental group or a control group. The experimental group received gait training with CIMT for 30 minutes per session, three sessions per week for four weeks, and the control group received gait training alone. [Results] The experimental group showed improvements in dynamic balance and the degree of improvement in this group was greater than that observed in the control group. Furthermore, the experimental group showed improvements in movement distances to the paretic side. On the other hand, the control group showed no significant improvements in balance indices after the intervention. [Conclusion] Gait training of stroke patients using CIMT techniques should be regarded as a treatment that can improve the balance of stroke patients.