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Jiyoun Kim
Department of Exercise Rehabilitation & Welfare, Gachon University, Incheon 21936, Korea

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Communication
Published: 27 July 2021 in Sensors
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Driver drowsiness is a major cause of fatal accidents throughout the world. Recently, some studies have investigated steering wheel grip force-based alternative methods for detecting driver drowsiness. In this study, a driver drowsiness detection system was developed by investigating the electromyography (EMG) signal of the muscles involved in steering wheel grip during driving. The EMG signal was measured from the forearm position of the driver during a one-hour interactive driving task. Additionally, the participant’s drowsiness level was also measured to investigate the relationship between muscle activity and driver’s drowsiness level. Frequency domain analysis was performed using the short-time Fourier transform (STFT) and spectrogram to assess the frequency response of the resultant signal. An EMG signal magnitude-based driver drowsiness detection and alertness algorithm is also proposed. The algorithm detects weak muscle activity by detecting the fall in EMG signal magnitude due to an increase in driver drowsiness. The previously presented microneedle electrode (MNE) was used to acquire the EMG signal and compared with the signal obtained using silver-silver chloride (Ag/AgCl) wet electrodes. The results indicated that during the driving task, participants’ drowsiness level increased while the activity of the muscles involved in steering wheel grip decreased concurrently over time. Frequency domain analysis showed that the frequency components shifted from the high to low-frequency spectrum during the one-hour driving task. The proposed algorithm showed good performance for the detection of low muscle activity in real time. MNE showed highly comparable results with dry Ag/AgCl electrodes, which confirm its use for EMG signal monitoring. The overall results indicate that the presented method has good potential to be used as a driver’s drowsiness detection and alertness system.

ACS Style

Afraiz Satti; Jiyoun Kim; Eunsurk Yi; Hwi-Young Cho; Sungbo Cho. Microneedle Array Electrode-Based Wearable EMG System for Detection of Driver Drowsiness through Steering Wheel Grip. Sensors 2021, 21, 5091 .

AMA Style

Afraiz Satti, Jiyoun Kim, Eunsurk Yi, Hwi-Young Cho, Sungbo Cho. Microneedle Array Electrode-Based Wearable EMG System for Detection of Driver Drowsiness through Steering Wheel Grip. Sensors. 2021; 21 (15):5091.

Chicago/Turabian Style

Afraiz Satti; Jiyoun Kim; Eunsurk Yi; Hwi-Young Cho; Sungbo Cho. 2021. "Microneedle Array Electrode-Based Wearable EMG System for Detection of Driver Drowsiness through Steering Wheel Grip." Sensors 21, no. 15: 5091.

Journal article
Published: 18 March 2021 in Sustainability
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This research analyzes the impact of quality of service as perceived by Hapkido students on their exercise continuation and recommendation intentions. It also identifies measures to reduce the rate of student dropout, strengthen competitiveness, and create more efficient marketing strategies for consumer patterns that are rapidly diversifying Hapkido. A questionnaire survey method was conducted with 300 middle and high school students, aged 14–19 years, with between three months and two years of Hapkido training in Incheon and Bucheon during March and April 2019. Frequency, factor, reliability, correlation, and standard multiple regression analyses were conducted on the surveyed data. The study concludes that, first, considering the impact of service quality on exercise continuation intention, service quality positively affects reliability, personification, and perceptual openness; in terms of possibility, it positively affects typicality, personification, and perceptual openness; and in terms of reinforcement, it positively affects reliability and perceptual openness. Second, regarding the impact of service quality on recommendation intention, it positively affects reliability, personification, and perceptual openness. Third, exercise continuation intention positively affects recommendation intention. This study suggests that various efforts should be made to increase the reliability, tangibility, confidence, and empathy of the service quality to increase the exercise continuation and recommendation intentions of the trainees of Hapkido gymnasiums.

ACS Style

Tae-Seung Park; Jun-Su Kim; Jiyoun Kim. The Impact of Perceived Hapkido Service Quality on Exercise Continuation and Recommendation Intentions, with a Focus on Korean Middle and High School Students. Sustainability 2021, 13, 3389 .

AMA Style

Tae-Seung Park, Jun-Su Kim, Jiyoun Kim. The Impact of Perceived Hapkido Service Quality on Exercise Continuation and Recommendation Intentions, with a Focus on Korean Middle and High School Students. Sustainability. 2021; 13 (6):3389.

Chicago/Turabian Style

Tae-Seung Park; Jun-Su Kim; Jiyoun Kim. 2021. "The Impact of Perceived Hapkido Service Quality on Exercise Continuation and Recommendation Intentions, with a Focus on Korean Middle and High School Students." Sustainability 13, no. 6: 3389.

Journal article
Published: 30 November 2020 in International Journal of Environmental Research and Public Health
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In this study, we performed a logistic regression analysis according to the frequency of participation in social leisure activities (education, clubs, social groups, volunteer activities, religious activities, and senior citizens’ welfare center use) by men and women aged ≥ 65 years. We investigated the frequency of participation in social leisure activities and their association with the level of frailty (health vs. pre-frailty, health vs. frailty, pre-frailty vs. frailty). This study included 10,297 older adults (men: 4128, women: 6169) who participated in the 2017 National Survey of Older Koreans, and were divided into three groups (healthy, pre-frailty, and frailty). Five frailty index components were used to measure the frailty level. There was a positive relationship between the elderly’s religious activities, four times a week, from the healthy stage to the frailty stage, from the healthy stage to the pre-frailty stage, and from the pre-frailty stage to the frailty. In addition, positive associations emerged in leisure activities and club activities, respectively, from the healthy stage to the frailty stage (once a week, respectively). Positive association also emerged from the healthy stage to the pre-frailty and from the pre-frailty stage to the frailty stage (once a month to once in a two-week period).

ACS Style

Alchan Kim; Eunsurk Yi; Jiyoun Kim; Munhee Kim. A Study on the Influence of Social Leisure Activities on the Progression to the Stage of Frailty in Korean Seniors. International Journal of Environmental Research and Public Health 2020, 17, 8909 .

AMA Style

Alchan Kim, Eunsurk Yi, Jiyoun Kim, Munhee Kim. A Study on the Influence of Social Leisure Activities on the Progression to the Stage of Frailty in Korean Seniors. International Journal of Environmental Research and Public Health. 2020; 17 (23):8909.

Chicago/Turabian Style

Alchan Kim; Eunsurk Yi; Jiyoun Kim; Munhee Kim. 2020. "A Study on the Influence of Social Leisure Activities on the Progression to the Stage of Frailty in Korean Seniors." International Journal of Environmental Research and Public Health 17, no. 23: 8909.

Journal article
Published: 02 November 2020 in International Journal of Environmental Research and Public Health
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There is a lack of research on Korean prospective elderly persons. In particular, there is little research regarding whether social support has a mediating effect on the relationship between physical activity and aging anxiety. Accordingly, this study investigated how social support affected physical activity and aging anxiety in 778 prospective senior citizens (55 to 65 years old) out of a total of 1447 senior citizens who participated in the Embrain Panel Power and Panel Marketing Interactive. Participants completed the IPAQ (International Physical Activity Questionnaires), Social Support Scale, and Aging Anxiety Scale. Physical activity in these Korean pre-older adults affected aging anxiety (p < 0.001), with a fixed effect of physical activity on social support (p < 0.001). Further, social support affected aging anxiety (p < 0.001). Social support was also an important parameter in the relationship between physical activity and aging anxiety. In conclusion, high physical activity of pre-older Korean persons lowered their anxiety regarding aging. Social support acted as a mediator that lowered anxiety regarding aging in the most active pre-older persons.

ACS Style

Ahra Oh; Jiyoun Kim; Eunsurk Yi; Jongseob Shin. Verification of the Mediating Effect of Social Support on Physical Activity and Aging Anxiety of Korean Pre-Older Adults. International Journal of Environmental Research and Public Health 2020, 17, 8069 .

AMA Style

Ahra Oh, Jiyoun Kim, Eunsurk Yi, Jongseob Shin. Verification of the Mediating Effect of Social Support on Physical Activity and Aging Anxiety of Korean Pre-Older Adults. International Journal of Environmental Research and Public Health. 2020; 17 (21):8069.

Chicago/Turabian Style

Ahra Oh; Jiyoun Kim; Eunsurk Yi; Jongseob Shin. 2020. "Verification of the Mediating Effect of Social Support on Physical Activity and Aging Anxiety of Korean Pre-Older Adults." International Journal of Environmental Research and Public Health 17, no. 21: 8069.

Journal article
Published: 22 September 2020 in International Journal of Environmental Research and Public Health
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Objective: We investigated the effectiveness of a 12-week SaBang-DolGi walking exercise program on the physical and mental health of menopausal women and aimed to provide the basic data needed to develop health promotion programs for the active and healthy aging of menopausal women. Materials and methods: The participants comprised 40 women aged 50–65 years who were divided into two randomly selected groups in training sessions (exercising group, n = 21 and control group, n = 19). A physical (grip, muscle and endurance) test and mental health test (simple mental health test II) were conducted using questionnaires with the aim of examining subjects’ physical and mental health before and after exercise. Results: After the intervention, the participants experienced positive changes in the physical dimension, with significant enhancements particularly in mental well-being and menopause-related health and subdomains. Controlled and regular exercise for 12 weeks was significantly correlated with a positive change in vitality and mental health. Conclusions: We found that the SaBang-DolGi walking exercise program helps to promote the physical and mental health of menopausal women who are exposed to the various stresses and depressions that accompany physical deterioration; the program was found to encourage active and healthy aging.

ACS Style

Eunhee Noh; Jiyoun Kim; Munhee Kim; Eunsurk Yi. Effectiveness of SaBang-DolGi Walking Exercise Program on Physical and Mental Health of Menopausal Women. International Journal of Environmental Research and Public Health 2020, 17, 6935 .

AMA Style

Eunhee Noh, Jiyoun Kim, Munhee Kim, Eunsurk Yi. Effectiveness of SaBang-DolGi Walking Exercise Program on Physical and Mental Health of Menopausal Women. International Journal of Environmental Research and Public Health. 2020; 17 (18):6935.

Chicago/Turabian Style

Eunhee Noh; Jiyoun Kim; Munhee Kim; Eunsurk Yi. 2020. "Effectiveness of SaBang-DolGi Walking Exercise Program on Physical and Mental Health of Menopausal Women." International Journal of Environmental Research and Public Health 17, no. 18: 6935.

Journal article
Published: 21 September 2020 in International Journal of Environmental Research and Public Health
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This study aimed to examine the relationships between activity restriction, quality of life (QoL), and hematopoietic profile in breast cancer survivors according to exercise modality. The subjects in this study were 187 female breast cancer survivors among a total of 32,631 participants in the Korea National Health and Nutrition Examination Survey, which was conducted from 2016 to 2018. The selected subjects participated in a questionnaire survey and blood analysis. A cross-analysis was conducted to determine the relationship between participation in various modality of exercise (e.g., aerobic exercise, resistance exercise, walking exercise). The phi coefficients or Cramer’s V value for activity restriction and QoL were calculated; an independent t-test was conducted to evaluate the differences between hematopoietic profiles based on the modality of exercise. Statistically significant correlations were seen between obesity and aerobic exercise and walking frequency, as well as between diabetes and aerobic exercise and activity restriction. With respect to QoL, there was a statistically significant correlation between participation in aerobic exercise and exercise ability, participation in aerobic exercise and anxiety/depression, participation in resistance exercise and subjective health status, participation in resistance exercise and exercise ability, and participation in weekly walking exercise and self-care ability. Regarding hemodynamic changes, red blood cells increased significantly in breast cancer survivors who participated in weekly resistance exercise compared to in those who did not. In conclusion, exercise participation had a positive effect on activity restriction, QoL, and hematopoietic profile in breast cancer survivors; in particular, some modalities of aerobic exercise were more effective.

ACS Style

Munhee Kim; Wi-Young So; Jiyoun Kim. Relationships between Exercise Modality and Activity Restriction, Quality of Life, and Hematopoietic Profile in Korean Breast Cancer Survivors. International Journal of Environmental Research and Public Health 2020, 17, 6899 .

AMA Style

Munhee Kim, Wi-Young So, Jiyoun Kim. Relationships between Exercise Modality and Activity Restriction, Quality of Life, and Hematopoietic Profile in Korean Breast Cancer Survivors. International Journal of Environmental Research and Public Health. 2020; 17 (18):6899.

Chicago/Turabian Style

Munhee Kim; Wi-Young So; Jiyoun Kim. 2020. "Relationships between Exercise Modality and Activity Restriction, Quality of Life, and Hematopoietic Profile in Korean Breast Cancer Survivors." International Journal of Environmental Research and Public Health 17, no. 18: 6899.

Journal article
Published: 29 July 2020 in International Journal of Environmental Research and Public Health
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The purpose of this study was to analyze and understand the mechanisms of physical activity obstructions in hospitalized cancer patients by investigating their physical activity levels, previous exercise experience levels, and exercise recognition. A survey was conducted for 194 hospitalized cancer patients using a questionnaire. In addition, we performed exploratory factor analysis, frequency analysis, reliability analysis, and hierarchical multiple regression analysis, using SPSS Statistics for Windows, Ver. 23.0. The results were as follows: (1) The physical activity level of the previous exercise participation experience (EPE) group had a greater effect on physical activity obstructions compared with the non-experience (NE) group. (2) The results for the effects of exercise recognition on the physical activity level and physical activity obstructions indicated that exercise recognition in the two groups increased the relative effects on physical activity obstructions in all variables except for the physical obstructions of the EPE group. Consequently, the physical activity level, exercise experience level, and exercise recognition in those patients were confirmed to be the major factors affecting their physical activity obstruction. Therefore, in this study, we provided quantitative data required for establishing healing environments based on motion.

ACS Style

Jeon Sangwan; Yi Eunsurk; Kim Jiyoun. Obstructions and the Recognition of Cancer Inpatient Physical Activity Based on Exercise Experience. International Journal of Environmental Research and Public Health 2020, 17, 5482 .

AMA Style

Jeon Sangwan, Yi Eunsurk, Kim Jiyoun. Obstructions and the Recognition of Cancer Inpatient Physical Activity Based on Exercise Experience. International Journal of Environmental Research and Public Health. 2020; 17 (15):5482.

Chicago/Turabian Style

Jeon Sangwan; Yi Eunsurk; Kim Jiyoun. 2020. "Obstructions and the Recognition of Cancer Inpatient Physical Activity Based on Exercise Experience." International Journal of Environmental Research and Public Health 17, no. 15: 5482.

Journal article
Published: 07 May 2020 in International Journal of Environmental Research and Public Health
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This study was intended to determine the applicability of an augmented-reality-based muscle reduction prevention exercise program for elderly Korean women by observing changes in exercise self-efficacy and verifying the effectiveness of the program in the elderly after the application of the program. A total of 27 participants, who were elderly women aged 65+ and had not participated in any exercise programs until this study, were recruited for this study. They were divided into an experimental group (13 people) and a control group (14 people), and then the augmented-reality-based muscle reduction prevention exercise program was applied. This was a 30-min program, which included regular, aerobic, and flexibility exercises, and it was applied 5 times a week for 12 weeks. As a result of observing changes, it was found that the appendicular skeletal muscle mass (ASM) (F = 11.222, p < 0.002) and the skeletal muscle index (SMI) (kg/m2) (F = 10.874, p < 0.003) muscle parameters increased more in the experimental group compared to the control group, and there was a significant increase in gait speed (m/s) (F = 7.221, p < 0.005). For physical performance, as a result of conducting the Senior Fitness Test (SFT), a significant change was observed in the chair stand test (F = 5.110, p < 0.033), 2-min step test (2MST) (F = 6.621, p < 0.020), and the timed up-and-go test (TUG) (F = 5.110, p < 0.032) and a significant increase was also observed for exercise self-efficacy (F = 20.464, p < 0.001). Finally, the augmented-reality-based exercise program in this study was found to be effective in inducing physical activity in the elderly. Therefore, the augmented-reality-based muscle reduction prevention exercise program is considered to be effective in increasing the sustainability of exercise, thus preventing muscle reduction in the elderly.

ACS Style

Sangwan Jeon; Jiyoun Kim. Effects of Augmented-Reality-Based Exercise on Muscle Parameters, Physical Performance, and Exercise Self-Efficacy for Older Adults. International Journal of Environmental Research and Public Health 2020, 17, 3260 .

AMA Style

Sangwan Jeon, Jiyoun Kim. Effects of Augmented-Reality-Based Exercise on Muscle Parameters, Physical Performance, and Exercise Self-Efficacy for Older Adults. International Journal of Environmental Research and Public Health. 2020; 17 (9):3260.

Chicago/Turabian Style

Sangwan Jeon; Jiyoun Kim. 2020. "Effects of Augmented-Reality-Based Exercise on Muscle Parameters, Physical Performance, and Exercise Self-Efficacy for Older Adults." International Journal of Environmental Research and Public Health 17, no. 9: 3260.

Journal article
Published: 01 April 2020 in Medicina
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Background and objectives: Electromyostimulation (EMS) has been shown to improve body composition, but what biomarkers it affects has not been investigated. The purpose of this study was to compare the EMS-effect of exercises with music on fatness and biomarker levels in obese elderly. Materials and Methods: Twenty-five women were randomly classified into a control group (CON) and EMS group (EMSG). EMS suits used in this study enabled the simultaneous activation of eight pairs with selectable intensities. Program sessions of EMS were combined with exercises of listening to music three times a week for eight weeks. Although both groups received the same program, CON did not receive electrical stimuli. Results: Compared with CON, a significant effect of the EMS intervention concerning decreased fatness, as well as an increased skeletal muscle mass and basal metabolic rate, were evident. Tumor necrosis factor-a, C-reactive protein, resistin, and carcinoembryonic antigen of biomarkers were significantly different in the groups by time interaction. Similarly, the positive changes caused by EMS were represented in lipoprotein-cholesterols. Conclusions: The results indicate that a significant effect due to the EMS intervention was found concerning body composition and biomarkers in obese elderly women.

ACS Style

Jiyoun Kim; Yongseok Jee. EMS-effect of Exercises with Music on Fatness and Biomarkers of Obese Elderly Women. Medicina 2020, 56, 158 .

AMA Style

Jiyoun Kim, Yongseok Jee. EMS-effect of Exercises with Music on Fatness and Biomarkers of Obese Elderly Women. Medicina. 2020; 56 (4):158.

Chicago/Turabian Style

Jiyoun Kim; Yongseok Jee. 2020. "EMS-effect of Exercises with Music on Fatness and Biomarkers of Obese Elderly Women." Medicina 56, no. 4: 158.

Journal article
Published: 25 February 2019 in Journal of Exercise Rehabilitation
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The purpose of this study was to investigate the effects of physical ac-tivity and nutrition education programs on mild dementia patients with changes in exercise function and eating habits. We examined the effects of pre and post program on 23 old patients with dementia who were diagnosed with menarche or mild dementia with the permission of the dementia center in Incheon city and visited from April to July 2017. The Mini-Mental State Examination score of the subjects in this study was 19.68±3.25, consisting of mild dementia patients. After performing the program for 16 weeks, the senior fitness test showed a significant change in the arm curl test, chair sit-and-reach test, and 2-min step test, and a total score of mini nutrition assessment increased from 19.16 to 21.0. In particular, in a level 2 evaluation, which contains more details such as the condition of taking drugs, number of daily meals, protein food intake condition, intake of vegetables, fruit, and water, whether one can eat alone, and evaluation of nutritive condition, a significant increase from 9.78 to 11.28 was verified. There is a significant increase in nutrition condition recovery as a result of nutrition education. In comparing pre and post program, a significant result was confirmed, and there was significance to provide the basic empirical data for the exercise and dietary life nutritional education of mild dementia patients.

ACS Style

Min-Soo Cho; Ji-Youn Kim. Effects of exercise and nutrition education programs on motor function and eating habit in mild dementia patients. Journal of Exercise Rehabilitation 2019, 15, 88 -94.

AMA Style

Min-Soo Cho, Ji-Youn Kim. Effects of exercise and nutrition education programs on motor function and eating habit in mild dementia patients. Journal of Exercise Rehabilitation. 2019; 15 (1):88-94.

Chicago/Turabian Style

Min-Soo Cho; Ji-Youn Kim. 2019. "Effects of exercise and nutrition education programs on motor function and eating habit in mild dementia patients." Journal of Exercise Rehabilitation 15, no. 1: 88-94.

Journal article
Published: 25 February 2019 in Journal of Exercise Rehabilitation
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This study was intended to provide basic data to promote youth participation in physical activity by determining the factors that affect the physical activities of Korean youth. To achieve the purpose of this study, data obtained from the 13th Youth Health Behavior Online Survey in 2017 was used as raw data and data on 62,276 youths were analyzed by frequency analysis, chi-square test, and logistic regression analysis using IBM SPSS Statistics ver. 22.0. The results suggested gender (P<0.001), school grade (P<0.001), and residential type (P<0.001) in general characteristics; subjective health status (P<0.001), stress perception (P<0.001), and sleep satisfaction (P<0.001); and finally drinking experience (P<0.004), smoking experience (P<0.009), and skipping breakfast in the morning (P<0.009) as factors affecting Korean youth's participation in physical activity. These results indicate that: male students participated in physical activities more than female students, and middle school students participated in physical activities more than high school students; students with a higher economic status and academic performance participated more in physical activities; and students with higher subjective health status, higher happiness, and higher sleep satisfaction, students who did not drink or smoke, and students who had breakfast participated more in physical activities.

ACS Style

Min-Soo Cho; Ji-Youn Kim. A study of factors affecting the physical activity of youth: analysis of data from the 13th youth health behavior online survey in 2017. Journal of Exercise Rehabilitation 2019, 15, 8 -14.

AMA Style

Min-Soo Cho, Ji-Youn Kim. A study of factors affecting the physical activity of youth: analysis of data from the 13th youth health behavior online survey in 2017. Journal of Exercise Rehabilitation. 2019; 15 (1):8-14.

Chicago/Turabian Style

Min-Soo Cho; Ji-Youn Kim. 2019. "A study of factors affecting the physical activity of youth: analysis of data from the 13th youth health behavior online survey in 2017." Journal of Exercise Rehabilitation 15, no. 1: 8-14.