• Safety and Health at Work
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• 제12권4호
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• pp.432-438
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• 2021

Background: We aimed to investigate the prevalence of low back pain (LBP) and its associated agricultural work-related, biomechanical factors among this population. Methods: We analyzed initial survey data from the Safety for Agricultural Injury of Farmers cohort study involving adult farmers in Jeju Island. The prevalence of LBP was calculated with associated factors. Results: In total, 1,209 participants were included in the analysis. The overall prevalence of LBP was 23.7%. Significant associations for LBP were the type of farming activity, length of farming career, prior agricultural injury within 1 year, and stress levels. Multivariate logistic regression analysis revealed three biomechanical factors significantly related to LBP: repetitive use of particular body parts; the inappropriate posture of the lower back and neck. Conclusions: Some occupational, and biomechanical risk factors contribute to LBP. Therefore, postural education, injury prevention education, and psychological support will be needed to prevent LBP.

• 디지털융복합연구
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• 제18권9호
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• pp.191-198
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• 2020

본 연구에서는 화재대응능력 향상을 위한 화재모의훈련의 개선방안을 제안하기 위해 3개의 업무시설물을 대상으로 화재모의훈련을 실시하고 훈련 교보재의 활용 여부와 대응단계별 대응시간의 훈련평가 반영 여부에 따라 변화하는 훈련 참여자들의 대응자세 및 대응능력을 관찰 및 분석하였다. 분석결과 대다수의 훈련 참가자들은 훈련 교보재 활용과 대응단계별 대응시간이 훈련평가에 반영될 때 훈련 참여도, 대응자세 및 대응능력이 향상되는 것으로 분석되었다. 화재모의훈련을 실시할 경우 훈련 참여자들의 화재대응능력(화재통보 및 화재신고, 초기소화, 대피) 향상과 유지를 위해 화재발생 상황을 유사하게 구현할 수 있는 훈련 교보재를 다수 활용하고 각 대응단계별 목표시간을 설정한 후 이를 기반으로 정량적인 훈련평가를 하여야만 화재대응능력 향상과 향후 화재모의훈련의 개선 및 피드백에 유용한 지표로 활용될 수 있다는 결과를 도출하였다.

• 한국엔터테인먼트산업학회논문지
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• 제15권8호
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• pp.363-377
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• 2021

본 연구에서는 만성 파킨슨병 환자의 동적탄력튜빙 보행 훈련 (I, II)이 자세정렬, 보행, 삶의 질에 미치는 영향을 조사하였다. 총 3명의 만성 파킨슨병 환자를 모집하여 사례 연구를 시행하였다(Hoehn 및 Yahr 1-3단계 각 1명). 동적탄력튜빙 보행 훈련 (I 및 II)은 파킨슨병 환자에게 하루 30분, 주 5일, 5주 동안 25세션 적용되었다. 본 연구의 효과를 알아보기 위해, 자세정렬검사, 근 활성도검사, 보행분석 및 파킨슨병 환자의 삶의 질을 평가하였다. Dynamic tubing 보행 훈련(I, II) 중재 후 몸통 굽힘은 감소되었다. 또한 초기 접촉기(IC)에서 중간 디딤기(Mst)까지 보행 시 넙다리네갈래근, 뒤넙다리근, 앞정강근(TA)의 근 활성도가 증가하고 장딴지근의 근활성도가 감소하였다. 척추세움근(ES T12, L3)의 근활성도는 H&Y I, III 단계에서 증가하고 H&Y II 단계에서 감소하였다. 압력 중심(COP) 매개변수인 보행선의 길이, 한 발 지지선, 앞/뒤 위치, 좌우대칭 값이 개선되었다. 시공간 보행 매개변수인 보폭, 보폭, 의 속도는 증가하고 분당걸음수는 감소되었다. 나아가 파킨슨 병 환자의 삶의 질도 개선되었다. 이러한 연구 결과를 바탕으로 동적탄력튜빙 보행 훈련 (I 및 II)은 약물 내성이 절반으로 감소된 5년 이상된 만성 파킨슨병 환자의 자세, 보행, 삶의 질을 개선하기 위한 새로운 접근 방식으로 적용될 수 있을 것이다.

• 한국웰니스학회지
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• 제14권2호
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• pp.207-223
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• 2019

본 연구의 목적은 체육과 신체활동 영역별(건강, 도전, 경쟁, 표현) 내용요소와 STEAM과의 융합을 통해 창의·융합 수업모듈 요소를 도출하는 것이며, 아울러 창의·융합 수업 모듈을 제시하는 것에 있다. 이를 위해 문헌연구, 포커스 그룹 인터뷰(FGI), 전문가 협의 방법을 실시하였으며 이를 통하여 다음과 같은 연구 결과를 도출하였다. 먼저 창의·융합 수업 모듈 요소와 관련하여 첫째, 건강 영역의 창의·융합 수업 모듈 요소는 자세 분석을 통한 위험성 도출, 신체활동량 분석과 설계 등 총 11개로 제시되었다. 둘째, 도전 영역의 모듈 요소는 총 6개로 목표 달성 저해 요인 예상, 효율적 운동을 위한 모델링 등의 내용이 도출되었으며, 경쟁 영역의 융합 요소는 17개로 경기 기록 분석, 경기데이터 저장을 위한 어플 제작 등의 내용이 제시되었다. 마지막으로 표현 영역의 창의·융합 모듈 요소는 총 10개로 움직임 표현 기술 향상을 위한 모델링, 움직임 표현 기록을 위한 기호화 등의 내용이 도출되었다. 아울러 수업 모듈은 건강 영역에서는 공학(E: Engineering) 분야와의 융합과 관련된 내용이 제시되었으며, 도전 영역에서는 기술(T: Technology)과의 융합, 경쟁 영역에서는 예술(A: Art)와의 융합, 표현 영역에서는 예술(A: Art)와, 수학(M: Mathematics)기호와)과의 융합을 통한 내용이 제시되었다.

• Safety and Health at Work
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• 제11권2호
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• pp.207-214
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• 2020

Background: Prolonged sitting at work can lead to adverse health outcomes. The health risk of office workers is an increasing concern for the society and industry, with prolonged sitting work becoming more prevalent. Objective: This study aimed to explore the variation in muscle activities during prolonged sitting work and found out when and how to take a break to mitigate the risk of muscle symptoms. Methods: A preliminary survey was conducted to find out the prevalence of muscle discomfort in sedentary work. Firstly, a 2-h sedentary computer work was designed based on the preliminary study to investigate the variation in muscle activities. Twenty-four participants took part in the electromyography (EMG) measurement study. The EMG variations in the trapezius muscle and latissimus dorsi were investigated. Then the intervention time was determined based on the EMG measurement study. Secondly, 48 participants were divided into six groups to compare the effectiveness of every break type (passive break, active break of changing their posture, and stand and stretch their body with 5 or 10 mins). Finally, data consisting of EMG amplitudes and spectra and subjective assessment of discomfort were analyzed. Results: In the EMG experiment, results from the joint analysis of the spectral and amplitude method showed muscle fatigue after about 40 mins of sedentary work. In the intervention experiment, the results showed that standing and stretching for 5 mins was the most effective break type, and this type of break could keep the muscles' state at a recovery level for about 30-45 mins. Conclusions: This study offers the possibility of being applied to office workers and provides preliminary data support and theoretical exploration for a follow-up early muscle fatigue detection system.

• The Journal of Korean Physical Therapy
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• 제2권1호
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• pp.35-46
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• 1990

The right hip adbuctor musculature has been reported to demonstrate 'stretch weakness' attributable to chronic elongation imposed by standing posture common to right-handed healthy persons. Kendall and associates have described the concept of 'stretch weakness'. The purpose of this study was to assess isometric hip abduction torque and surface electro-myographic activity (using MYOMED 432) in a sample of 40 healthy right-handed persons (20 male, 20 female), all of whom agreed to participate in the study, and compare side difference in the hip abductor musculature. In order to assure the statistical significance of the results, the paired t-test was applied at the .05 level of significance. The results were as follows : 1. The difference in apparent leg length of right and left legs was significant at the .05 leve1. 2. There was a significant difference between right and left pelvic height (standing position) at the .005 level measurements, and scapula height at the .05 level. 3. Power measurements and action potentials of right hip adbuctor were greater than the left hip adbuctor regardless of the range of joint motion (inner range, outer range). 4. The difference in muscle power and action potentials according to inner or outer range of both hip abductor were significant at the .05 level. 5. In supine during active left hip abduction, the appearance of action potentials in the right hip abductors is indicative of contra-lateral effect (p<.005). These results suggest : In healthy right-handed persons. the apparent leg length on the right is longer than on the left, and pelvic height is elevated on the right side. Muscle torque and muscle action potentials of the right hip adbuctor art higher than those of the hip abductor in the lengthened position. Therefore, the results in this study are contrary to Kendall's. This type of study should be carried out in many physical therapy departments.

• Safety and Health at Work
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• 제12권1호
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• pp.51-56
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• 2021

Background: Neck pain is a major public health problem among sewing machine operators working in textile factories. Even though the textile industries are growing in number in Ethiopia, but there is a dearth of published studies on the prevalence of neck pain. Therefore, this study was aimed to assess the prevalence and associated factors of neck pain among sewing machine operators of garment factories in Mekelle city. Method: An institutional-based cross-sectional study design was implemented among 297 sewing machine operators' working in garment factories in Mekelle city. A systematic random sampling technique was used. Data were collected through interviews and analyzed using Statistical Package for Social Science version 23. Finally, variables with 95% confidence interval (CI): p < 0.05 in the multivariate analysis were significantly declared. Results: Two hundred ninety-seven sewing machine operators were enrolled, with 98.7% response rates. In this study, the 12-month prevalence rate of neck pain was found to be 42.3% (95% CI: 36.6%-47.9%), and variables like such as break time [adjusted odds ratio (AOR): 5.888, 95% CI: (2.775-12.493)], working hours per day [AOR: 6.495, 95% CI: (2.216-19.038)], static posture [AOR: 4.487, 95% CI (1.640-12.275)], and repetitive activity [AOR: 4.519, 95% CI:(2.057-9.924)] were associated with neck pain. Conclusion: In this study, neck pain is a major public health problem. Continuous work without break time, working greater than 8 hours per day, sitting in the same position for greater than 2 hours, and high repetitive activities were found significantly associated with neck pain. Owners and governmental bodies need to focus on developing preventive strategies and safety guidelines.

• 한국전문물리치료학회지
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• 제31권1호
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• pp.8-17
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• 2024

Background: Sleep accounts for approximately one-third of a person's lifetime. It is a relaxing activity that relieves mental and physical fatigue. Pillows of different sizes, shapes, and materials have been designed to improve sleep quality by achieving an optimal sleep posture. Objects: This study aimed to determine which pillow provides the most comfortable and supports the head and neck during sleep, which may enhance sleep quality. Methods: Twenty-eight healthy adults (19 males and 9 females) with an average age of 29 years participated in this cross-sectional study. This experiment was conducted while the participants laid down for 5 minutes in four different pillow conditions: (1) no pillow (NP), (2) neck support foam pillow (NSFP), (3) standard microfiber filled pillow (SFP), and (4) hybrid foam pillow (HFP). The head-neck peak pressure, cranio-vertebral angle in supine (CVAs), cranio-horizontal angle in supine (CHAs), chin-sternum distance (CSD), and muscle tone of sternocleidomastoid were analyzed using one-way repeated measures analysis of variance (ANOVA). The significance level was set at p < 0.05. Results: The head-neck peak pressure was the highest in the NSFP condition, followed by the NP, SFP, and HFP conditions. The CVAs, CHAs, and CSD of the SFP were lower than those of the other pillows. Muscle tone was the highest in the NP condition, followed by the of NSFP, HFP, and SFP conditions. The participants subjective comfort level in both the supine and side-lying postures was highest in the HFP condition, followed by the SFP and NSFP conditions. Conclusion: This study can be used to establish the importance of pillow selection for high-quality sleep. The results of this study, suggest that a hybrid pillow with a good supportive core and appropriate fluffiness can maintain comfort and correct cervical spine alignment during sleep.

• 한국전문물리치료학회지
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• 제26권3호
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• pp.57-66
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• 2019

Background: Visual and somatosensory integration processing is needed to reduce pusher behavior (PB) and improve postural control in hemiplegic patients with acute stroke. Objects: This study aimed to investigate the effects of game-based postural vertical training (GPVT) on PB, postural control, and activity daily living (ADL) in acute stroke patients. Methods: Fourteen participants with acute stroke (<2 months post-stroke) who had PB according to the Burke lateropulsion scale (BLS) (score>2) were randomly divided into the GPVT group ($n_1=7$) and conventional postural vertical training (CPVT) group ($n_2=7$). The GPVT group performed game-based postural vertical training using a whole-body tilt apparatus. while the CPVT group performed conventional postural vertical training to reduce PB (30 minutes/session, 2 times/day, 5 days/week for 3 consecutive weeks). The BLS was evaluated to assess the severity of PB. And each subject's postural control ability and ADL level were assessed using the postural assessment scale for stroke (PASS), balance posture ratio (BPR), and Korean-modified Barthel index (K-MBI). Outcomes were measured pre- and post-intervention. Results: Comparison of the pre- and post-intervention assessment results showed that both interventions led to the following significant changes: decreased severity of PB scores and increased PASS, BPR, and K-MBI scores (p<.05). In particular, statistical analysis between the two groups, the BLS score was significantly decreased in the GPVT group (p<.05). And PASS, BPR, and K-MBI scores were significantly improved in the GPVT group than in the CPVT group (p<.01, respectively). Conclusion: This study demonstrated that GPVT lessened PB severity and improved postural control ability and ADL levels in acute stroke patients.

• 한국운동역학회지
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• 제17권2호
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• pp.113-121
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• 2007

The purpose of this study was to determine the effect of three different plates($0^{\circ}$, $10^{\circ$}, $20^{\circ}$)under heels on the lower limb muscles and erector spinae during squat exercise. Ten high school korean traditional wrestling players(age: $18.5{\pm}0.7$, weight: $1972.2{\pm}128.5N$, height: $177.8{\pm}6.0cm$, weight of barbell: $1004.5{\pm}132.4N$) performed squat exercise using three different tilting plates under heels at a cadence of 40beats/sec with 80% one repetition maximum load. Surface electrodes were placed on the participants' left and right erector spinae, and rectus femoris, vastus medialis, vastus lateralis, tibialis anterior, biceps femoris, medial gastrocnemius, and lateral gastrocnemius in the right lower extremity. One S-VHS camcorder(Panasonic AG456, 60fields/s) was placed 10m to the side of the participant. To synchronize the video and EMG data, a synchronization unit was used for this study. Average and Peak IEMG values were determined for each participant. For each variable, a one-way analysis of variance was used to determine whether there were significant differences among three different tilting plates under heels. When a significant difference was found in plates type, post hoc analyses were performed using the Tukey procedure. A confidence level of p<.05 was used to determine statistical significance. As a result of this study, maximum nEMG values of the tibialis anterior in $0^{\circ}$ plates was significantly higher than the corresponding values for the other plates during the knee extension. This increased activation in the tibialis anterior muscle indicates an increase in displacement of center of gravity of body. It is very likely that additional muscle activation are needed to stop the forward and backward movement. The results also showed that muscular activities of quadriceps femoris and erector spinae were decreased with increasing angle of plates. This suggests that increasing angle of plate may help to sustain the balance and posture of squat exercise. It is considered that very few significant differences were found among three different plates($0^{\circ}$, $10^{\circ}$, $20^{\circ}$) since elite players with much experience in squat exercise, were chosen as a participant of this study. In order to obtain meaningful results regarding the tilting angle of heel plates in squat exercise, kinetic and 3D kinematic analysis will be needed in the future study.