Hye-Seon Jeon

Yonsei University, Sŏul, Seoul, South Korea

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Publications (52)33.84 Total impact

  • Jeong-Soo Kim · Sun-Young Kang · Hye-Seon Jeon ·
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    ABSTRACT: The body-weight-support treadmill (BWST) is commonly used for gait rehabilitation, but other forms of BWST are in development, such as visual-deprivation BWST (VDBWST). In this study, we compare the effect of VDBWST training and conventional BWST training on spatiotemporal gait parameters for three individuals who had hemiparetic strokes. We used a single-subject experimental design, alternating multiple baselines across the individuals. We recruited three individuals with hemiparesis from stroke; two on the left side and one on the right. For the main outcome measures we assessed spatiotemporal gait parameters using GAITRite, including: gait velocity; cadence; step time of the affected side (STA); step time of the non-affected side (STN); step length of the affected side (SLA); step length of the non-affected side (SLN); step-time asymmetry (ST-asymmetry); and step-length asymmetry (SL-asymmetry). Gait velocity, cadence, SLA, and SLN increased from baseline after both interventions, but STA, ST-asymmetry, and SL-asymmetry decreased from the baseline after the interventions. The VDBWST was significantly more effective than the BWST for increasing gait velocity and cadence and for decreasing ST-asymmetry. VDBWST is more effective than BWST for improving gait performance during the rehabilitation for ground walking.
    Physiotherapy Theory and Practice 10/2015; 31(7):466-473. DOI:10.3109/09593985.2015.1037875
  • Myung-Sook Ko · Jung-Hee Doo · Jeong-Soo Kim · Hye-Seon Jeon ·
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    ABSTRACT: Aim: The aim of this study was to examine the effects of whole body vibration (WBV) training and conventional physical therapy on spatiotemporal gait parameters, functional mobility and activities of daily living (ADL) in children with cerebral palsy (CP). Methods: A pretest–posttest control group design was used. In this 3-week trial, 24 children with spastic CP were randomly selected to either continue their physical therapy or to receive WBV in addition to their physical therapy programme. Gait analyses, the Timed Up and Go (TUG) test and the Functional Independence Measure for Children (WeeFIM) were conducted before and after training. Results: For spatiotemporal gait parameters, this study found statistically significant differences in the WBV group’s walking speed (p = 0.002), step length of the affected side (p = 0.021) and step width (p = 0.007) pre- and post-training. Between the two groups, there was a statistically significant difference in step width (F = 5.326, p = 0.031) and significant improvements in the WBV group’s TUG scores (p = 0.039) compared with the control group. According to the results of WeeFIM, there were no significant differences between the two groups after training. Conclusions: Administration of WBV training to children with CP in conjunction with conventional physical therapy leads to improvements in functional mobility.
    International Journal of Therapy and Rehabilitation 07/2015; 22(7):321-328. DOI:10.12968/ijtr.2015.22.7.321
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    ABSTRACT: The aim of this research was to investigate which shoulder abduction angle (30°, 90°, 150°) during shrug exercise is superior for 1) activating the scapular upward rotators and 2) improving scapular and clavicular position in subjects with scapular downward rotation impairment. Twenty subjects performed shrug exercises at three different shoulder abduction angles (30°, 90°, 150°) which were obtained and maintained actively. Surface EMG data were collected from the levator scapulae (LS), upper trapezius (UT), lower trapezius (LT), and serratus anterior (SA) during shrug exercises. Scapular downward rotation index (SDRI) and clavicular tilt angle (CTA) were measured immediately after each shrug exercise. Oneway repeated-measures analysis of variance was used to determine the significance. UT muscle activity was greater at 90° and 150° than at 30° of shoulder abduction. UT/LS muscle activity ratio was greater at 90° than at 30°. LT and LT/LS increased as shoulder abduction angle increased. SA was greater at 150° than at 30° or 90°. SA/LS was greater at 150° than at 30°. SDRI was lower at 90° and 150° than at 30°. CTA was greater at 90° and 150° than at 30°. In conclusion, shrug exercises at 90° or 150° of shoulder abduction angle may be advocated to activate scapular upward rotators, decrease SDRI, and increase CTA in patients with scapular downward rotation impairment.
    Journal of Electromyography and Kinesiology 04/2015; 25(2):363-370. DOI:10.1016/j.jelekin.2014.12.001 · 1.65 Impact Factor
  • Myung-Sook Ko · Hye-Seon Jeon · Sujin Hwang ·

    03/2015; 16(3):1894-1903. DOI:10.5762/KAIS.2015.16.3.1894
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    Myung-Sook Ko · Jung-Ah Lee · Sun-Young Kang · Hye-Seon Jeon ·
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    ABSTRACT: The purpose of this case report is to investigate the long-term effect of Adeli suit treatment (AST) in a child with cerebral palsy (CP) on spatial-temporal gait parameters, 10-meter walking speed, gross motor functional measure (GMFM) and performance on the pediatric balance scale (PBS). An eight-year-old girl with spastic diplegia classified as level III on the Gross Motor Function Classification System participated in this single-subject A-B design study, with a baseline and an intervention phase. The baseline phase was collected at one-week intervals for six weeks and then the AST intervention phase was carried out with 18 AST sessions, 50 min per session, once a week for an 18-week period. Spatial-temporal gait parameters significantly improved after the completion of 18 sessions. Furthermore, 10-meter walking speed, GMFM and PBS changed significantly from the baseline measurement (p < 0.05). In conclusion, the AST was effective in improving gait, gross motor function and balance in a child with diplegic CP. Clinically, neuro-rehabilitation with AST provided a complementary and alternative treatment for lower extremity rehabilitation in this child with CP. These findings provide preliminary evidence supporting the effectiveness of AST in children with spastic CP, and thus underscore the need for additional research in this area.
    Physiotherapy Theory and Practice 12/2014; 31(4). DOI:10.3109/09593985.2014.996307
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    ABSTRACT: The goal of the current study was to investigate potential differences in back and hip extensor muscle activity and hip extension force during prone hip extension (PHE) in individuals with lumbar segmental instability (LSI) and asymptomatic subjects. Thirty-six subjects with LSI and 26 asymptomatic volunteers participated in this study. Muscle activity of the erector spinae, gluteus maximus, and biceps femoris was recorded using electromyography (EMG), and hip extension force was measured by a digital force gauge. Muscle activity was significantly greater in subjects with LSI than in asymptomatic subjects during PHE (p < 0.05). Hip extension force was significantly lower in the subjects with LSI than in asymptomatic subjects during PHE (p < 0.05). These findings suggest that during PHE, subjects with LSI have differences in back and hip extensor muscle activity and hip extension force compared to asymptomatic individuals.
    Manual Therapy 11/2014; 20(3). DOI:10.1016/j.math.2014.11.002 · 1.71 Impact Factor
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    ABSTRACT: Background: Tightness of the iliotibial band (ITB) has been documented as a major factor in lateral patellar translation because the ITB inserts into the lateral border of the patella through the iliopatellar band. The aim of this study was to compare the patella-condyle distance (PCD) between subjects with and without ITB tightness. We also investigated the relationship between ITB length and lateral patellar translation in hip adduction. Methods: In 40 healthy volunteers, we measured the ITB length with Ober's test and the PCD at two hip positions (neutral and 20° adduction) using ultrasonography. Lateral patellar translation in hip adduction was calculated by subtracting the PCD at the adduction position from the hip neutral position. Results: Twenty-three of the 40 subjects had ITB tightness; these subjects had a significantly laterally positioned patella at 20° adduction of the hip (p=0.044). Patients with ITB tightness also had greater lateral patellar translation in hip adduction than patients without tightness (p=0.000). The ITB length was moderately correlated with the PCD at 20° adduction of the hip (r=0.427, p=0.042) and strongly negatively correlated with lateral patellar translation (r=-0.717, p<0.000). Conclusions: These findings support the hypothesis that increasing ITB tension has a significant effect on the position of the patella and therefore affects translation of the patella. However, these findings do not indicate that ITB length is the only cause of lateral patellar translation; further studies are needed to assess the relative importance of different factors that could affect patellar position.
    The Knee 10/2014; 21(6). DOI:10.1016/j.knee.2014.09.005 · 1.94 Impact Factor
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    Yun-Chan Oh · Heon-Seock Cynn · Chung-Hwi Yi · Hye-Seon Jeon · Tae-Lim Yoon ·

    09/2014; 21(3):1-10. DOI:10.12674/ptk.2014.21.3.001
  • Jeong-Soo Kim · Hye-Seon Jeon · Yeon-Gyu Jeong ·

    09/2014; 21(3):80-88. DOI:10.12674/ptk.2014.21.3.080
  • Min-Jae Jeon · Hye-Seon Jeon · Chung-Hwi Yi · Heon-Seock Cynn ·

    09/2014; 21(3):45-54. DOI:10.12674/ptk.2014.21.3.045
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    Hye-Seon Jeon · Sun-Young Kang · Joo-Hee Park · Hyun-Sook Lee ·
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    ABSTRACT: Objective to compare the effects of pulsed electromagnetic field (PEMF) therapy and sham treatment on DOMS-related variables in elbow flexors at 24, 48 and 72 hours after delayed onset muscle soreness (DOMS) induction exercise. Design randomized, double-blind, placebo-controlled study. Setting Yonsei University laboratory. Participants In total, 30 healthy male college students Main outcome measures: Muscle soreness, peak torque, median frequency (MDF) and electromechanical delay (EMD) during isometric contraction at 24, 48 and 72 hours after DOMS induction exercise. Results Overall, the application of the PEMF was found to be effective in reducing the physiological deficits associated with DOMS, including improved recovery of perceived muscle soreness, MDF, and EMD during isometric contraction. Our results did not show that PEMF treatment was mechanically more effective in isometric peak torque generation compared to the sham group. Conclusion this study indicates that PEMF may be useful as a modality to reduce DOMS symptoms. However, further well-designed experiments are required to determine optimal treatment dosage and duration, and to investigate the physiological and clinical mechanisms of PEMF on DOMS.
    Physical Therapy in Sport 03/2014; 16(1). DOI:10.1016/j.ptsp.2014.02.006 · 1.65 Impact Factor
  • Sun-Young Kang · Sung-Dae Choung · Hye-Seon Jeon ·

    02/2014; 21(1):55-62. DOI:10.12674/ptk.2014.21.1.055
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    Jeong-Soo Kim · Jeong-Ah Kim · Hye-Seon Jeon · Kyung-Hoon Yu ·
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    ABSTRACT: The purpose of this study was to determine which spatiotemporal gait parameters obtained during hemiplegic walking could be a predictive factor for the Timed Up and Go test (TUG). Two hundreds nine subjects who had suffered a stroke were recruited for this study. They were participated in two assessments; the TUG test and gait analysis. The relationship between the TUG test and spatiotemporal parameters was analyzed using Pearson's correlation coefficients. In addition, to predict the spatiotemporal gait parameters that correlated most with the TUG scores, we used multiple linear regression analyses (stepwise method). The results show that the normalized velocity was strongly correlated with the TUG performance (r=-.72, p
    11/2013; 20(4). DOI:10.12674/ptk.2013.20.4.040
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    Joo-Hee Park · Sun-Young Kang · Hye-Seon Jeon ·
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    ABSTRACT: The smart-phone has become a necessity for most people. In this study, we determined that using a smart-phone for 20 minutes can cause increased neck and shoulder muscle activities and fatigue. Seventeen healthy male smart-phone users who attended Yonsei University played a smart-phone game for 20 minutes and changes in their bilateral cervical erector spinae and upper trapezius muscle activities and fatigue were measured. To assess muscle activities and fatigue, we used the following variables: the median frequency, the 50th percentile Amplitude probability distribution function (APDF) value (median load), and the discrepancy in the 90th percentile APDF value and the 10th percentile APDF value (APDF range). A paired t-test was used to compare pre-smart-phone-use status with post-smart-phone-use-status. The median frequency of the bilateral cervical erector spinae and the upper trapezius decreased significantly after 20 minutes of smart-phone use (p
    09/2013; 20(3). DOI:10.12674/ptk.2013.20.3.019
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    Sun-Young Kang · Joo-Hee Park · Hye-Seon Jeon · Hyun-Sook Lee ·
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    ABSTRACT: Delayed onset muscle soreness (DOMS) is a painful condition that arises from exercise-induced muscle damage after unaccustomed physical activities. Various therapeutic interventions have been applied to reduce the intensity and duration of DOMS-related symptoms. Recently, pulsed electromagnetic field (PEMF) intervention has been introduced as an alternative noninvasive treatment for DOMS. This randomized, double-blind, placebo-controlled experiment was conducted to examine the effects of PEMF therapy on DOMS in elbow flexors at 24, 48, and 72 hours after the experimental DOMS induction. Thirty healthy volunteers ( yrs, cm, and kg) participated in this study. Each was randomly assigned to a PEMF or placebo group. On the first day, DOMS was induced in the elbow flexors by repeated isokinetic motions at low () and fast () speeds in all subjects. Thereafter, the PEMF group received 15-min daily treatment with a PEMF device. The placebo group received sham treatment of the same duration. Overall, PEMF application was more effective than the sham treatment in reducing the physiological symptoms associated with the DOMS including perceived soreness, median frequency, and electromechanical delay of the surface electromyography. In addition, median frequency and isokinetic peak torque of the PEMF group recovered to the pre-DOMS induction level earlier than the placebo group. In conclusion, this study suggests that PEMF can be applied as a new recovery strategy in reducing DOMS symptoms. Further experiments are required to examine the effect of the PEMF treatment on different types of exercise conditions and to determine the optimal treatment dosage and duration in a real clinical setting.
    05/2013; 20(2). DOI:10.12674/ptk.2013.20.2.011
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    Bo-Ram Choi · Su-Jin Hwang · Hee-Won Lee · Sun-Young Kang · Hye-Seon Jeon ·
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    ABSTRACT: We evaluated whether group locomotor imagery training-combined knowledge of performance (KP) lead to improvements in gait function in community dwelling individuals with chronic stroke. Ten adults who had suffered a hemiparetic stroke at least 6 months earlier participated in group locomotor imagery training-combined KP for 5 weeks, twice per week, with 2 h intensive training. Dynamic gait index scores increased significantly after the group locomotor imagery training-combined KP. However, times for the timed up-and-go test did not improve significantly after the training. Group locomotor imagery training-combined KP may be a useful option for the relearning of gait performance for community dwelling individuals with chronic hemiparetic stroke.
    02/2013; 20(1). DOI:10.12674/ptk.2013.20.1.074
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    Sun-Young Kang · Hye-Seon Jeon · Ohyun Kwon · Heon-Seock Cynn · Boram Choi ·
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    ABSTRACT: The direction of fiber alignment within a muscle is known to influence the effectiveness of muscle contraction. However, most of the commonly used clinical gluteus maximus (GM) exercises do not consider the direction of fiber alignment within the muscle. Therefore, the purpose of this study was to investigate the influence of hip abduction position on the EMG (electromyography) amplitude and onset time of the GM and hamstrings (HAM) during prone hip extension with knee flexion (PHEKF) exercise. Surface EMG signals were recorded from the GM and HAM during PHEKF exercise in three hip abduction positions: 0°, 15°, and 30°. Thirty healthy subjects voluntarily participated in this study. The results show that GM EMG amplitude was greatest in the 30° hip abduction position, followed by 15° and then 0° hip abduction during PHEKF exercise. On the other hand, the HAM EMG amplitude at 0° hip abduction was significantly greater than at 15° and 30° hip abduction. Additionally, GM EMG onset firing was delayed relative to that of the HAM at 0° hip abduction. On the contrary, the GM EMG onset occurred earlier than the HAM in the 15° and 30° hip abduction positions. These findings indicate that performing PHEKF exercise in the 30° hip abduction position may be recommended as an effective way to facilitate the GM muscle activity and advance the firing time of the GM muscle in asymptomatic individuals. This finding provides preliminary evidence that GM EMG amplitude and onset time can be modified by the degree of hip abduction.
    Manual therapy 01/2013; 18(4). DOI:10.1016/j.math.2012.11.006 · 1.71 Impact Factor
  • Hye-Seon Jeon · Sujin Hwang · Young-Keun Woo ·
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    ABSTRACT: Background: This study examined the effects of ankle and knee joint immobilization on postural control in healthy young adults while standing. Methods: The 24 participants included in this study participated in postural standing tests under four different constraint conditions: free joints, ankle immobilization only, knee immobilization only, and ankle-knee immobilization. Tests were performed using a commercial balancing equipment (Biodex(TM), Inc., NY, USA) and software. Results: The overall limit-of-stability score and duration to completion of task were obtained at 75% limit-of-stability (moderate level of difficulty). The overall limit-of-stability score of free joints (34.5±9.1) were significantly different with the ankle immobilization only (26.0±11.6), and ankle-knee immobilization (26.4±7.4) conditions. The test duration increased in the following order: free joints (57.8±10.9), knee immobilization only (62.5±14.0), ankle immobilization only (68.0±14.9), and ankle-knee immobilization (69.4±17.7). The duration of the free joint condition greatly decreased than ankle immobilization only and ankle-knee immobilization conditions. Conclusions: The ankle and knee joints have sufficient range of motion to prevent falls related to decrease postural stability due to insufficient range of motion or to improve postural stability.
    The Knee 11/2012; 20(6). DOI:10.1016/j.knee.2012.09.001 · 1.94 Impact Factor
  • Hee-Seok Jung · Hye-Seon Jeon · Duck-Won Oh · Oh-Yun Kwon ·
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    ABSTRACT: As a means of external stabilization of the sacroiliac joint (SIJ), many clinicians have often advocated the use of the pelvic compression belt (PCB). The objective of this pilot study was to compare the effects of the PCB on hip extensor muscle activation patterns during one-leg standing in subjects with and without sacroiliac joint pain (SIJP). Sixteen subjects with SIJP and fifteen asymptomatic volunteers participated in this study. Surface electromyography (EMG) data [signal amplitude and premotor reaction time (RT)] were collected from the gluteus maximus and biceps femoris muscles of the supporting leg during one-leg standing with and without the PCB. Compared to that of the asymptomatic individuals, the EMG amplitude of the biceps femoris was significantly decreased in individuals with SIJP upon the application of the PCB (p < 0.05). Furthermore, on using the PCB, in individuals with SIJP, the RT of the gluteus maximus was significantly decreased; however, the RT of the biceps femoris was increased (p < 0.05). Thus, our data support the use of the PCB to modify the activation patterns of the hip extensors among patients with SIJP.
    Manual therapy 10/2012; 18(2). DOI:10.1016/j.math.2012.09.003 · 1.71 Impact Factor
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    ABSTRACT: A commercial splinting system is designed to permit quick training in opening and closing the affected hand in order to overcome the disadvantages of previous approaches. The purpose of this study was to assess the feasibility of intensive training using a spring-assisted hand orthosis on upper extremity in individuals with chronic hemiparetic stroke. Five participants for the experimental group and 5 for the control group were recruited from a local rehabilitation hospital. Subjects in the experimental group participated in 4 weeks of training using a SaeboFlex orthosis for 1 hour per day, 5 times per week. Each subject in the control group wore the same orthosis for 1 hour per day without participating in upper extremity training. Outcome measures included the Fugl-Meyer Assessment, Box and Block Test, and Action Research Arm Test; kinematic parameters were collected using a 3-D motion analysis system. The Fugl-Meyer assessment and the Box and Block Test score were increased significantly in the experimental group after the intervention. The resultant velocity of the wrist joint for the reach-to-grasp task decreased significantly, and the resultant velocity of the shoulder joint while performing a reach-to-grasp task at acromion height decreased significantly in the experimental group. A pilot clinical study of spring-assisted dynamic hand orthosis training is feasible in recovering the movement of the hemiparetic upper extremity.
    Topics in Stroke Rehabilitation 07/2012; 19(4):320-8. DOI:10.1310/tsr1904-320 · 1.45 Impact Factor

Publication Stats

177 Citations
33.84 Total Impact Points


  • 2008-2015
    • Yonsei University
      • • College of Health Sciences
      • • Department of Ergonomic Therapy
      Sŏul, Seoul, South Korea
  • 2010
    • Daejeon University
      • Department of Physical Therapy
      Daiden, Daejeon, South Korea