Background: At present time, smartphones have become very popular and powerful devices, and smartphone applications with the good validity have been designed to assess human balance ability. Objects: The purpose of this study is to evaluate the feasibility of smartphone acceleration in the assessment of postural control ability for six different conditions. Methods: Twenty healthy college-aged individuals volunteered. Static balance ability was measured twice with one-day interval using smartphone application and 3D motion capture system under the six different conditions. Results: Dominant frequencies for each test condition did not show significant differences except for two conditions. The intra-rater correlation coefficient between the first and second tests showed high correlations in six conditions(r>.70, p<.05). Smartphone acceleration and the acceleration calculated from the 3D marker position data showed high correlation coefficient(r>.80, p<.001). Conclusion: Acceleration recorded from a smartphone could be useful assessment variables for balance test in the clinical field.

Postural instability can increase the likelihood of hazardous slip and fall accidents in workplaces. The present study intended to extend understanding of the effect of abnormal neck posture on postural control during quiet standing. The effect of body fatigue on the postural control was also of primary concern. Twelve healthy undergraduate students volunteered to participate in the experiment. Standing on a force platform with the neck neutral, flexed, extended, or rotated, subjects’ center of pressures (COP) were measured under the two levels of body fatigue. For the fatigue condition, Subjects exercised in a treadmill to meet the predetermined level of body fatigue. Analyzing the position coordinates of COPs, the length of postural sway path was assessed in both medio-lateral (ML) axis and anterior-posterior (AP) axis. Results showed that, in AP direction, neck extension or rotation significantly increased the sway length as compared with neck neutral. Neck extension led to greater sway length compared to neck rotation. Neck flexion did not differ from neck neutral. The sway length in the AP direction also became significantly larger as the body fatigue accumulated after treadmill exercise. In ML direction, as compared to neutral posture, the neck extension, flexion, or rotation did not significantly affect the length of postural sway path. However, the sway length seemed to increase marginally with the neck extended during the fatigued condition. This study demonstrates that abnormal neck posture may interfere with postural control during standing. The ability to maintain postural stability decreases significantly with the neck extended or rotated. Body fatigue leads to postural instability further.

Background: Hemispatial neglect is defined as the failure to attend, report, respond, or orient toward meaningful stimuli provided in the contralateral side of a brain lesion. Objects: This study was conducted to find out the effect of dynamic trunk equilibirum exercise for stroke patients with hemi-spatial neglect. Methods: This study included 21 stroke subjects, randomly assigned to either the experimental group or the control group. The exercise program consisted of 5 sessions of 20 minutes per week during 4 weeks. The line-bisection test, the Albert test, the balance function score, the Berg balance scale, the postural assessment scale for stroke and the modified Barthel index were measured before and after training. All data were analyzed using SPSS 12.0 for Windows. Between-group and within-group comparison was analyzed by using Independent t-test and Paired t-test respectively. Results: The results of study were as follows: There were significant differences between before and after intervention in both group (p<.05). There were significant differences in the line-bisection test, Albert test, balance function score, Berg balance scale, postural assessment scale for stroke and modified Barthel index between the experimental group and the control group (p<.05). Conclusion: Dynamic trunk equilibrium exercise had a positive effect on patients’ neglect, balance ability and activities of daily living. Further studies are required to generalize the results of this study.

Background: Deficits of both ankle dorsiflexion range of motion (DFROM) and dynamic balance are shown in persons with chronic ankle instability and the elderly, with the risk of falls. Objects: This study aims to investigate the relationship between DFROM and dynamic balance in elderly subjects and young adults. Methods: Fifty-nine subjects were divided into three groups: ankle stability young group (SY), ankle instability young group (IY) and ankle stability older group (SO). We recruited three old subjects with ankle instability, but excluded them during a pilot testing due to the safety issue. DFROM was measured by weight bearing lunge test (WBLT) and dynamic balance was measured via star excursion balance test (SEBT) in anteromedial, medial, and posteromedial directions. The group differences in WBLT and SEBT and each group’s correlation between WBLT and SEBT were detected using the R statistical software package. Results: The dorsiflexion range of motion was significantly different between the SY, IY, and SO groups. The SO group showed the highest DFROM and IY group showed the lowest DFROM (SY: 45.88±.66˚, IY: 39.53±1.63˚, SO: 47.94±.50˚; p<.001). However, the SO group showed the lowest dynamic balance score for all SEBT directions (SY: 87.24±2.05 ㎝, IY: 83.20±1.30 ㎝, SO: 77.23±2.07 ㎝; p<.05) and there was no relationship between the dorsiflexion range of motion and dynamic balance in any group. Conclusion: Our findings suggest that ankle DFROM is not a crucial factor for dynamic stability regardless of aging and ankle instability. Other factors such as muscle strength or movement coordination should be considered for training dynamic balance. Therefore, we need to establish the rehabilitation process by measuring and treating ROM, balance, and muscle strength when treating young adults with and without ankle instability as well as elderly people.

Background: The Berg Balance Scale (BBS) and the Fullerton Advanced Balance (FAB) scale have been used to assess balance function in patients with chronic stroke. These clinical balance scales provide information about potential risk factors for falls. Objects: The purpose of this study was to investigate the incidence of and risk factors of falls and compare the predictive values of the BBS and FAB scale relative to fall risk in patients with stroke through receiver operating characteristic analysis. Methods: Sixty-three patients with stroke (faller=34, non-faller=29) who could walk independently for 10 meters participated in this study. The BBS and FAB scale were administered. Then, we verified the cut-off score, sensitivity, specificity, and the area of under the curve. Results: In this study, the BBS and FAB scale did not predict fall risk in patients with stroke in the receiver operator characteristic curve analysis. A cut-off score of 37.5 points provided sensitivity of .47 and specificity of .35 on the BBS, and a cut-off score of 20.5 points provided sensitivity of .44 and specificity of .45 on the FAB scale. Conclusion: The BBS and FAB scale were not useful screening tools for predicting fall risk in patients with stroke in this study, but tho

최근 사회적 변화에 따라 일과 가정의 명확한 경계가 무너지고, 가족이라는 사회구성 기본 단위가 가지 는 의미가 점차 강조되고 있다. 이에 따라 일-가정 균형(work-family balance)을 통해 직장에서의 요구와 가족 내의 책임을 동시에 효과적으로 수행하는 것이 무엇보다 중요해지고 있다. 그러나 기업 내 인적자원 의 효과적 활용을 위해 지난 30여년 가까이 수행되어 온 전략적 인적자원관리(strategic human resource management)에 관한 연구는 이러한 최근의 사회적 변화를 효과적으로 고려하지 못하고 있다. 본 연구에 서는 전략적 인적자원관리와 일-가정 균형에 관한 문헌을 바탕으로 종업원의 일-가정 양립 지각이 고몰 입 작업시스템->조직몰입->조직시민행동으로 이어지는 고몰입 작업시스템의 작동원리를 강화하는 효 과에 대해 측정해 보았다. 구체적으로 3개의 조직에 근무하는 368명의 종업원으로부터 2차에 걸쳐 수집한 종단자료를 사용하여 일-가정 양립 지각이 1)고몰입 작업시스템과 조직몰입의 관계, 그리고 2)조직몰입 과 조직시민행동의 관계를 동시에 조절하는 이중조절효과 분석을 실시하였다. 결과에 따르면 고몰입 작 업시스템은 조직몰입을 통해 조직시민행동을 유발하는 효과가 있는 것으로 나타났으며, 이러한 일련의 과정에 대한 일-가정 균형 지각의 이중조절효과는 지지되었다. 이에 따른 본 연구의 시사점 및 한계점이 논의되었다.

목적: 프리즘렌즈를 이용해 유발시킨 수평 및 수직이향운동의 자극변화가 정적자세에서 신체균형의 안정성과 낙상지수에 미치는 영향을 알아보고자 하였다. 방법: 평균나이 22.75±2.93세의 53명을 대상으로 하였고, 신체균형의 평가는 TETRAX biofeedback system을 사용하여 실시하였다. 완전교정 후 원거리 주시상태에서 정적신체 균형의 안정성지수와 낙상지수를 측정한 뒤, BI 4△과 8△ 장입상태 및 BI프리즘으로 복시를 유발한 상태, 그리고 BO 4△과 8△ 장입상태 및 복시를 유발한 상태, 그리고 BU 4△ 장입상태와 복시를 유발한 상태에서 각각 반복측정을 실시한 후 완전교정상태에서 측정한 값과 비교분석하였다. 결과: BI 프리즘을 부가하여 측정한 안정성지수와 낙상지수는 완전교정상태와 비교해 유의한 차이를 보이지 않았다(p>0.05). 하지만 BO 프리즘을 부가하여 측정한 안정성지수는 4 △과 8△에서 완전교정상태와 비교해 현저히 증가하였고, 복시상태에서는 다시 감소하였다 (p<0.05). 또한 BU 4△을 부가하여 측정한 안정성지수와 낙상지수 모두에서 완전교정상태와 비교해 유의하게 증가하였다가 복시상태에서는 다시 감소하였다(p<0.05). 결론: 복시상태에서보다 양안선명단일시를 유지시키기 위한 이향안구운동자극이 개입될 때 정적신체균형의 안정성은 저하되었다. 특히 수직방향의 이향안구운동이 발생할 때 안정성저 하와 더불어 낙상의 위험도 증가하는 것으로 나타났다. 따라서 수평 및 수직이향운동의 발생을 유발시키는 잘못된 PD와 Oh는 안정적인 정적신체균형의 유지를 방해하는 요소가 될 수 있을 것으로 사료된다.

Background: The Pediatric Balance Scale (PBS) was developed to assess of balance ability in children with balance problem. The PBS was translated into Korean and its reliability had been studied. However, it had need to be verified using psychometric characteristics including item fit and rating scale. Objects: The purpose of this study was to investigate the item fit, item difficulty, and rating scale of the Korean version of PBS using Rasch analysis. Methods: In total, 40 children with cerebral palsy (CP) (boy=17, girl=23) who were diagnosed with level 1 or 2 according to the Gross Motor Function Classification System participated in this study. The PBS was performed, and was verified regarding the item fit, item difficulty, rating scale, and separation index and reliability using Rasch analysis. Results: In this study, the ‘transfer’, and ‘turning to look behind left and right shoulders while standing still’ item showed misfit statistics. in total 40 children with CP. Also, ‘transfer’, ‘standing unsupported with feet together’ and ‘standing with one foot in front’ items showed misfit statistics in diplegia CP group. Regardless of the classification of CP, the most difficult item was ‘standing on one foot’, whereas the easiest item was ‘sitting with back unsupported and feet supported on the floor’. The 4 rating scale categories of PBS were acceptable with all criteria. Both item and person separation indices and reliability showed acceptable values. Conclusion: The PBS has been proven reliable, valid and is an appropriate tool, but it needs to modify the items of PBS according to CP classification.

Background: Many studies have reported positive results of the various mirror training and virtual reality games in improving dynamic standing balance and posture adjustment in chronic stroke patients. However, no systematic study has been conducted to compare the effects of virtual reality games and the mirror balance training. Objects: The purpose of this study was to compare the effectiveness of Wii balance games and Mirror Self- Balancing Exercises in improving proprioception of knee joint and standing balance of people with chronic stroke. Methods: Twenty patients with chronic stroke volunteered for this study. The subjects were randomly divided into a Wii balance games group and a Mirror Self-Balancing Exercises group with 10 patients in each group. Each training was performed for 30 mins a day for 4 days. In addition to the balance training, 30 mins neuro-developmental-treatment based routine physical therapy was given to both groups. Proprioception was measured using two continuous passive motion devices, and static balance was measured using a Wii balance board. Dynamic balance assessment tools included the Berg Balance Scale, Dynamic Gait Index, and Timed Up-and-Go test. Results: All measured variables before and after the experimental results showed a significant improvement in both groups (p<.05). Only the improvement of the affected knee proprioception appeared to be significantly greater in the Wii balance game group (p<.05). However, other variables did not differ between the groups (p>.05). Conclusion: The findings suggest that both Wii balance games and Mirror Self-Balancing Exercises may be helpful for improving the proprioception of knee joint and the balance of patients with chronic stroke.

The purpose of this study is to design and develop integrated game system for experiential walking exercise. Existing walking exercise is performed outside, so it is influenced by external weather, temperature, time, place and other situation information. Therefore, it is necessary to have an experiential walking exercise game that can induce the recommended level of physical activity for the elderly who have a low interest in health care. The experiential exercise game requires a vision - based system to recognize motion and a smart mat that can recognize walking information. We also developed a walking exercise program to improve the sense of balance and cognitive ability of elderly people. There are 4 types of Walking Exercise Games: 5 levels for beginner, intermediate, and advanced difficulty levels.

목적 : 상호작용식 메트로놈(Interactive Metronome; IM)을 이용한 반복적인 움직임 과제 훈련이 지역사 회 거주 노인의 균형기능과 낙상효능감, 인지기능에 미치는 영향을 알아보고자 하였다. 연구방법 : D시에 거주하는 60세 이상 노인 3명에게 회당 31분씩 11회기 동안 IM훈련을 적용하여 균형 기능, 낙상효능감, 주의력의 변화 추이를 살펴본 단일대상연구로, 평가도구로는 IM Short Form Test (IM SFT), 4분면 구획스텝검사(Four Step Square Test (FSST)), Fullerton Advanced Balance (FAB) Scale, 한국어판 낙상효능감 척도, 한국어판 활동특이적 균형 자신감 척도와 100에서 연속으로 다섯 번 7 빼기 과제를 사용하였다. 결과 : 3명의 대상자 모두 초기기초선 기간에 비해 중재 기간의 IM SFT SRO% 평균값이 증가하였고, 중 재 전에 비해 중재 후의 균형기능 평가 점수가 향상되었다. 3명의 대상자 모두 초기기초선 기간에 비하 여 중재 기간 동안 주의력 평가 평균 점수가 향상되었다. 결론 : IM을 이용한 훈련이 노인의 균형기능과 인지기능을 향상시키기 위한 중재로 적용 가능함을 확인하 였다.

목적 : 본 연구는 가상현실 프로그램이 뇌졸중 환자의 실행 기능, 균형능력에 미치는 영향을 알아보고자 하 였다. 연구방법 : 발병 6개월 이후의 뇌졸중 환자 64명을 대상으로 하였고, 무작위 난수 생성 기능을 사용하여 가상현실 치료군과 비디오 관찰군으로 두 집단을 나눈 뒤 하루 20분, 주 3회, 5주간 실시하였다. 가상현실 치료군에는 NintendoⓇ 사의 Wii FitTM을 사용한 가상현실 치료(Virtual Reality Therapy; VRT)를, 비디오 관찰군에는 Wii FitTM의 데모 비디오 관찰(Video Observation; VO)을 시행하였으며 동일 기간 동안 20분의 일반 작업치 료 및 운동치료를 함께 중재 받았다. 중재 전·후의 차이를 비교하기 위하여 한국판 행동 통제 척도(Korean version of Behavioral Dyscontrol Scale; BDS-K)와 기능적 뻗기 검사(Functional Reaching Test; FRT), 일어나 걸어가기 검사(Timed Up and Go test; TUG)를 사용하였다. 결과 : 실험 결과 두 집단의 중재 후 점수 간 비교에서 BDS-K에 유의한 차이를 보였다(p<.05). 또한, 가 상현실 치료군의 중재 전-후 변화를 분석한 결과 BDS-K, FRT, TUG에서 대조군보다 유의한 증가를 보였다(p<.05). 결론 : 본 연구에서는 가상현실 프로그램을 받은 집단에서 실행 기능과 균형능력의 향상을 보였으며, 중재 후 두 집단의 비교 결과 실행 기능에 향상이 있음을 확인하였다. 본 연구의 결과를 통해 가상현실 프로 그램을 수행하고자 하는 치료사들에게 임상적 결정을 내리는 기초 자료를 제공하고자 한다.

2016년 4월 7일, 식품의약품안전처에서 [제1차 당류 저감 종합계획]을 발표하였다. 발표 내용에 의하면 당류의 과잉 섭취는 국민 건강을 위협하고 과도한 사회비용을 야기할 수 있고, 우리 국민의 가공식품을 통한 당류 섭취량이 증가 하고 있어 선제적 관리가 필요하다고 한다. 우리 국민의 평균 당류 섭취량은 섭취기준 이내이지만 증가 추세이며 일 부 계층(어린이, 청소년, 청년층)의 가공식품을 통한 당류 섭취량은 기준을 초과한다고 밝혔다. 가공식품 중 당류 주요 급원식품은 음료류이며 음료류를 통한 당류 섭취비율은 증가추세에 있다고 한다. 따라서 식품의약품안전처는 ‘우리 국민의 당류 적정 섭취 유도 - 가공식품을 통한 당류 섭취량을 1일 열량의 10% 이내로 관리’를 2020년까지의 목표로 설정하고, 1) 덜 달게 먹는 식습관 유도, 2) 당류 저감식품 선택환경 조성, 3) 당 류 저감정책 추진기반 구축이라는 3대 핵심전략을 바탕으로 세부 과제를 추진하기 시작하였다. 이어서, 한국식품산업협회는 식품의약품안전처의 발표에 대하여 ‘식품산업계는 정부의 당류 저감 정책에 적극 참여 할 것’이라는 제목의 성명서를 발표한 바 있다. 식품산업계는 국민의 요구와 식품업계 수용 역량에 맞게 추진될 수 있 도록 적극 참여하고자 한다고 밝히고, 특히 우리나라 당류 섭취 수준이 다른 국가에 비해 아직 심각하지 않으나, 당류 과잉 섭취와 비만이 문제되고 있는 국제적인 상황에 선제적으로 국가적 노력을 추진코자 하는 정부의 발표에 식품산 업계의 뜻을 같이 하고자 한다고 하였다. 이에, 식품산업계는 다양한 제품 개발에 힘써 소비자들의 선택 폭을 넓히도 록 돕는 한편, 소비자들의 올바른 식생활 형성을 위한 과학적이고 객관적인 정보 전달과 건강한 생활을 지속할 수 있 도록 안전하고 균형잡힌 영양의 식품을 제공하기 위한 노력을 지속하겠다고 성명하였다. 현재, 식품산업협회에서는 음료류 제조업체들이 중심이 되어 ‘음료업계 공통의 당류 저감 계획(안)’을 마련하기 위 하여 활발한 협의가 진행되고 있으며, 논의가 되고 있는 당류 저감 전략은 다음과 같다. 음료업계의 당류 저감 전략은 1) 기존 제품의 당류 함량 저감 (Reformulation), 2) 저당 제품 개발 확대 (Innovation), 3) 소용량 포장 제품 확대 (Smaller Package), 4) 당류 저감 제품의 광고/홍보 증대 (Promotion)로 논의 되고 있다. 기존 제품에 대하여 저감화 우선 순위을 설정하여 순차적으로 당류 저감을 진행하는 한편, 저당 제품 개발의 확대를 위하 여 새로운 고감미료 및 무열량 당류 등의 신소재 원료 식품(첨가물)의 개발에 연구 및 투자를 하고 있다. 또한 기능성 워터 제품, 탄산수 제품, 블랙 커피 제품과 소용량 포장 제품을 확대하여 판매/공급하면서 이러한 당류를 줄인 제품에 대한 광고/홍보비를 증대하는 등의 과제를 계속 시행 및 추가 계획하고 있다. 음료업계는 소비자의 기호에 맞는 제품을 제공하는 것 뿐만 아니라 우리 국민의 균형된 식생활을 돕기 위해 당류의 적정 섭취에 도움이 되는 제품들 개발/판매에 노력을 더 할 것으로 기대한다. 결과적으로, 음료업계를 포함한 식품산업계는 우리 국민이 당류 적정 섭취를 통한 건강한 식생활을 유지할 수 있도 록, 당류를 줄인 제품을 어디서든 쉽게 선택할 수 있도록 하는데 노력하는 것이 바람직할 것이다.

Loss of postural stability can possibly lead to slip and fall accidents in the number of workplaces and everyday life. This study was aimed to examine the effects of whole body fatigue and partially limited visual field on the ability of maintaining postural balance during quiet standing. A group of twelve healthy male subjects participated in the experiment. Before and after experiencing the whole body fatigue induced by bicycling exercises, the position coordinates of subject’s center of pressure (COP) were obtained under the two levels of visual field condition (i.e., open visual field and limited visual field). Four levels of the whole body fatigue examined were rest, 300watt, 600watt, and 900watt. Position coordinates of COPs measured on a force plate were then converted into the total length of postural sway path in both the medio-lateral (ML) direction and the anterior-posterior (AP) direction. Two-way ANOVA result showed that the length of sway path in the AP direction became significantly larger as the whole body fatigue accumulated. Post-hoc test revealed statistically significant differences between rest and 900watt and between 300watt and 900watt. The significant increase of the sway length was also found when the visual field was partially obstructed by the boxes. In the ML direction, however, there was no statistically significant difference of the postural sway in both the AP and ML directions. The results imply that the ability of maintaining postural stability can be reduced significantly due to such tasks along with whole body fatigue. The postural balance can also be impaired by the limited visual field.

This study was conducted to evaluate the milk productivity and nutrient balance in organic dairy farms located at Gochang-gun of Korea with different feed sources. The total number of organic dairy farms was 12 in 2012, 13 in 2013, and 14 in 2014. The numbers of farms and dairy herds were increased each year. The average milk yields in 2012, 2013, and 2014 were 25.5, 24.6, and 24.4 kg/d, respectively. The average milk fat contents in 2012, 2013, and 2014 were 3.5%, 3.6%, and 3.7%, respectively. The average milk protein contents in 2012, 2013, and 2014 were 3.3%, 3.4%, and 3.4% in 2012, 2013, and 2014, respectively. Although the average milk yield of organic dairy farms was 9 kg/cows/d less than the average milk yield of other dairy farms in Korea, milk fat and protein contents of organic dairy farms were higher than those of other dairy farms. Alfalfa hay, oat hay, corn silage, rye grass silage, Sudan grass silage, rice straw, and barley silage were commonly used as forage sources in organic dairy farms. The average silage intake (15.6 kg/cow/d) of organic dairy farms in 2013 was higher (P < 0.05), while the average hay intake (5.1 kg/cow/d) in 2014 was higher (P < 0.05) than that of other feed intake. Net energy for lactation (NEL) and metabolizable protein (MP) were calculated in accordance with NRC (2001). Net energy for lactation intake was higher (P < 0.05) while MP intake was lower (P < 0.05) than NRC recommendation values in 2013 and 2014. These results indicate that domestic organic dairy farms should use feed considering energy and protein balance recommended by NRC.

Background: The assessment tool developed in other countries should be translated into Korean language using rigorous methodological approaches in order to be used in Korea. Because these procedures are insufficient for establishing the cross-cultural and linguistic equivalence, the need for statistical methods is raised. The Fullerton Advanced Balance Scale was translated into Korean and the content validity was verified through the back translation method, but the reliability and validity have not yet been proven by statistical methods. Objects: The purpose of this study was to investigate the reliability and validity of the Korean version of the Fullerton Advanced Balance Scale (KFAB) by statistical methods in elderly people. Methods: A total of 97 elderly adults (39 males and 58 females) participated in this study. Internal consistency of the KFAB was measured using Cronbach’s alpha and an intraclass correlation coefficient (ICC) was used to assess test-retest reliability between the two measurement sessions. Concurrent validity was measured by comparing the KFAB responses with the Korean version of the Berg Balance Scale (KBBS) using the Spearman correlation coefficient. Construct validity of the KFAB was measured using the exploratory factor analysis to evaluate the unidimensionality of the questionnaire. The significance level was set at α=.05. Results: The internal consistency of the KFAB was found be adequate with Cronbach’s alpha (.96), and test-retest reliability was excellent as evidenced by the high ICC (r=.996). Concurrent validity showed high correlation between the KFAB and KBBS (r=.89, p<.001). Construct validity was evaluated using exploratory factor analysis. The result from Bartlett test of sphericity was statistically significant (p<.001), and the value of Kaiser-Meyer-Olkin measure of sampling adequacy was .93. Exploratory factor analysis revealed the existence of only one dominant factor that explained 76.43% of the variance. Conclusion: The KFAB is a reliable, valid and appropriate tool for measuring the balance functions in elderly people.