• 운동영양학회지
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• 제24권4호
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• pp.15-23
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• 2020

[Purpose] Lactate is a principal energy substrate for the brain during exercise. A single bout of high-intensity interval exercise (HIIE) can increase the blood lactate level, brain lactate uptake, and executive function (EF). However, repeated HIIE can attenuate exercise-induced increases in lactate level and EF. The lactate levels in the brain and blood are reported to be correlated with exercise-enhanced EF. However, research is yet to explain the cause-and-effect relationship between lactate and EF. This study examined whether lactate consumption improves the attenuated exercise-enhanced EF caused by repeated HIIE. [Methods] Eleven healthy men performed two sets of HIIE, and after each set, 30 min were given for rest and examination. In the 2^nd set, the subjects consumed experimental beverages containing (n = 6) and not containing (n = 5) lactate. Blood, cardiovascular, and psychological variables were measured, and EF was evaluated by the computerized color-word Stroop test. [Results] The lactate group had a higher EF (P < 0.05) and tended to have a higher blood lactate level (P = 0.082) than the control group in the 2^nd set of HIIE. Moreover, blood lactate concentration was correlated with the interference score (i.e., reverse score of EF) (r = -0.394; P < 0.05). [Conclusion] Our results suggest that the attenuated exercise-enhanced EF after repeated HIIE can be improved through lactate consumption. However, the role of lactate needs to be elucidated in future studies, as it can be used for improving athletes' performance and also in cognitive decline-related clinical studies.

• 한국의류산업학회지
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• 제24권6호
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• pp.744-755
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• 2022

This study sought to verify the shopping values that tourists pursue by purchasing at travel destinations based on tourists' motivation and identify the effects of these values on the types of fashion items preferred by tourists. Furthermore, this study verified the tourist shopping behavior of three Asian countries-Korea, China, and Japan-from a cross-cultural perspective. To obtain a sample that represents tourist shoppers in each country, a survey was conducted on adult men and women in their 20s to 60s, and 986 subjects were collected: 300 Koreans, 385 Chinese, and 301 Japanese. Factor analysis, structural equation modeling, and multigroup SEM were performed on the collected data using SPSS Statistics and AMOS. Based on escaping-seeking theory, tourist intentions were divided into escaping and seeking motivations, and tourist shopping values were divided into functional, emotional, and social. The shopping items were divided into materials and experiential goods to understand the difference between the types preferred by tourists according to the perceived value. In addition, differences in tourist shopping behaviors according to the three nationalities were identified. The findings illustrate that the escaping motive affects emotional and social values, whereas the seeking motive affects all three. Moreover, it was confirmed that functional and emotional values affect preference for material and experiential goods, but social value only affects preference for material goods. For the cross-cultural study, differences in tourist shopping behavior according to nationality were identified.

• Journal of Chest Surgery
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• 제56권3호
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• pp.186-193
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• 2023

Background: Complete surgical excision is the only curative treatment for primary cardiac tumors. For wide excision, interatrial septal reconstruction (ISR) is commonly performed. We hypothesized that ISR may increase the risk of postoperative atrial tachyarrhythmia (AT) after surgical resection of cardiac myxoma. Methods: After excluding patients with a history of cardiac surgery and concomitant procedures unrelated to tumor resection and those with AT or permanent pacemakers, we finally enrolled 272 adult patients who underwent benign cardiac tumor surgery from 1995 to 2021 at our institution. They were divided into the ISR (n=184) and non-ISR (n=88) groups. The primary outcome was postoperative new-onset AT. Results: The study cohort predominantly consisted of women (66.2%), with a mean age of 57.2±13.6 years. The incidence of postoperative new-onset AT was 15.4%. No 30-day mortality or recurrence was observed. The cardiopulmonary bypass time and aortic cross-clamping time were significantly longer in the ISR group than in the non-ISR group (p<0.001). The median duration of hospital stay of all patients was 6.0 days (interquartile range, 5.0-7.0 days), and no significant difference was observed between the 2 groups (p=0.329). ISR was not an independent predictor of new-onset AT (p=0.248). Male sex and hypertension were found to be independent predictors of new-onset AT. Conclusion: ISR was not a significant predictor of postoperative new-onset AT. ISR might be a feasible and safe procedure for surgical resection of cardiac myxoma and should be considered if needed.

• Journal of Chest Surgery
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• 제57권3호
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• pp.255-262
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• 2024

Background: Sutureless aortic valves may enable shorter procedure times, which benefits patients with elevated surgical risk. We describe the outcomes of patients with aortic stenosis who underwent aortic valve replacement (AVR) using the sutureless Perceval aortic bioprosthesis. Methods: Data from a retrospective cohort were obtained from a clinical database. The study enrolled patients with symptomatic severe aortic stenosis who underwent surgical AVR with a sutureless bioprosthesis between August 2015 and December 2020. In total, 113 patients were included (mean age, 75.3±8.4 years; 57.5% women; median Society of Thoracic Surgeons score, 9.7%; mean follow-up period, 51.19±20.6 months). Of these patients, 41 were octogenarians (36.2%) and 3 were nonagenarians (2.6%). Transthoracic echocardiography was employed to assess changes in ejection fraction (EF), left ventricular mass index (LVMI), and mean pressure gradient (MPG). Results: The in-hospital mortality rate was 2.6%, and 13 patients developed new-onset atrial fibrillation. A permanent pacemaker was implanted in 3 patients (2.6%). The median intensive care unit stay was 1 day (interquartile range [IQR], 1-2 days), and the median hospital stay was 12 days (IQR, 9.5-15 days). The overall survival rate at 5 years was 95.9%. LVMI and MPG were reduced postoperatively, while EF increased over the follow-up period. No structural valve deterioration was observed, and no meaningful paravalvular leakage developed during follow-up. Conclusion: The use of a sutureless valve in the aortic position is safe and feasible, even for high-risk elderly patients requiring surgical AVR. LVMI and MPG decreased postoperatively, while EF increased over the follow-up period.

• 패션비즈니스
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• 제8권2호
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• pp.42-55
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• 2004

The purpose of this study was to classify the contents of department stores and large-scale discount stores of consumer on information source, shopping orientation and store image in an effort to determine which variable gave a crucial impact on cosmetics department stores and large-scale discount stores selection behavior. The subjects of this study were 557 adult women visited department store and large-scale discount store in Busan. The data were analyzed by using Factor analysis, Frequency analysis, Correlation analysis, Cronabach $\alpha$ and Regression analysis. The results were as follows; 1. There was a difference in the demographical characteristics on department stores and large-scale discount stores of consumers. 2. Shopping Orientation of consumers were categorized into 5 types, and information source of consumers did 3 types, and store image of consumers did 5 types. 3. Leisure utilization, store & brand loyalty, store information, personal information, massmedia information, product & operate on, store atmosphere & salesperson and shopping convenience had positive correlations with cosmetics department stores selection beavior. but convenient location, rationality & economy and sales promotion had negative correlations with cosmetics department stores selection beavior. 4. Rationality & economy and sales promotion had positive correlations with cosmetics large-scale discount stores selection beavior. but convenient location, leisure utilization, store & brand loyalty, massmedia information, product & operate on, store atmosphere & salesperson and shopping convenience had negative correlations with cosmetics large-scale discount stores selection beavior. 5. Age, income, business(-), convenient location(-), rationality & economy(-), leisure utilization, store & brand loyalty, store information, personal information, massmedia information, store atmosphere & salesperson, shopping convenience and sales promotion(-) had a direct effect on cosmetics department stores selection beavior. Age, income, marriage, education had an indirect effect on department stores selection beavior through information source and store image, and information source did through store image, and shopping orientation did through store image. 6. Rationality & economy, convenient location(-), leisure utilization(-), store & brand loyalty(-), buying independence(-), personal information, massmedia information(-), product & operate on(-), shopping convenience(-) and sales promotion had a direct effect on cosmetics large-scale discount stores selection beavior. Age, income, marriage, education had an indirect effect on large-scale discount stores selection beavior through information source, shopping orientation and store image, and information source did through store image, and shopping orientation did through store image.

• Child Health Nursing Research
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• 제5권2호
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• pp.211-234
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• 1999

The purpose of this article was to get hold of adolescent's needs for sex knowledge and to reveal their understanding of sex. These results may be applied to the sex education and counselling for adolescent. The participants of study were 267 students (females, 144 ; males, 123) who were the first and second grade form 1 middle and 2 high schools. They were asked to describe 3 questions that they wanted to know or to learn about sex. Their questions about sex were total 779(girls, subtotal 456, mean 3.2, boys, subtotal 323, mean, 2.6). These questions categorized to 9 items by content analysis. The items were ‘sexual drive, behavior and tendency(229, 29.4%)’ , ‘anatomy and physiology of reproductive system(140, 18.0%)’, ‘reproduction(131, 16.8%)’, ‘concept of sex(31, 4.0%)’, ‘acquaintance between the other sexes(17, 2.2%)’, and ‘the others(9, 1.2%)’ in order of frequency. The most frequent item that the student want to know or team about sex was ‘sexual drive, behavior and tendency’ except girls of sophomore in middle school. There were several features in participants' needs for sex knowledge as respects of the understanding of sex- biological sex, gender, and sexuality. The prominent feature in knowledge need of bio logical sex was that the participants had the interests according to their biological sex. They had the negative attitude to the phenomenons (ex, menstruation and pregnancy, phimosiectomy, etc) that they experienced or would experience due to their biological sex. A part of them asked the questions based the misconceptions and used the slangs or ‘××’, ect. to name the male or female genitalia. The male students wanted to know the female genitalia. The participants' understanding of gender reflected the sexism of our society, but they didn't accept and had doubts about the dual, hierarchical structure of that. The students, especially female seemed to be powerless to the harms of the sexual violence. Girls had much interest in their appearances and complained to our sexual culture that women comforted and served men. The participants had the dual perspective that the sexuality as respects of physiologic phenomenon was considered as natural but that as related to heterosexuals was as negative. And they deemed that men's sexual drive was stronger than women's and was difficult or was not able to be inhibited. They had much interests in homosexuality but reflected the negative attitude to that in our society. Adolescent felt wonder why the expressions of sexuality of adult were permitted but theirs were not. Lastly, a part of boys substituted querying the sexuality of animals for asking that of human. Maybe it was because of the embarrassment to talk about human's sexuality directly. The teenaged participants understood that the sex had not only the biological meanings but also the sociocultural meanings. They regarded the sex as natural and wanted to know it, but they had conceptions that it was difficult and embarrass to talk about it openly and directly.

• 생명과학회지
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• 제21권1호
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• pp.9-14
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• 2011

심박수(heart rate) 및 산소 소비량(oxygen consumption) 등의 생리학적 변수는 운동자각도(RPE)와 밀접한 관련이 있으며, RPE의 남녀차이에 의한 예측 운동강도의 정확성은 아직 밝혀지지 않고 있고, 본 연구는 남녀 대학생의 심장 혈관 및 신진대사의 반응을 평가하고 남녀의 차이를 밝히는 데 있다. 남자대학생($25.1{\pm}1.56$ yr)과 여자대학생($25.0{\pm}4.12$ yr) 각각 10명이 본 연구에 자발적으로 참여를 하였고, 본 연구를 위하여 설정된RPE는 Borg의 15 범주에서 결정을 하였으며, 점증적 운동부하(graded exercise testing)는 Bruce Treadmill Protocol을 이용하였다. 남녀의 평균 slope (p=0.501)와 RPE의 plotting rates와 최대산소섭취율(% $VO_2$max)은 유의한 차이가 나타나지 않았다. 각자의 상대적 최대산소섭취량은 남학생의 경우52.36${\pm}$7.35 ml/kg/min, 여학생은 41.44${\pm}$6.71 ml/kg/min로 나타나 두 그룹간에 유의하게 큰 차이가 있었으며, 절대적 최대산소섭취량은 남학생은 4.05${\pm}$0.36 l/min, 여학생은 2.53${\pm}$0.39 l/min로 나타나 두 그룹간에 큰 차이가 나타냈다. 남학생과 여학생간의 slope, y-intercept, SEE는 통계적으로 유의한 차이는 없었다. 본 연구에서 운동강도에 따른 남학생과 여학생의 RPE 의 차이는 유의하게 나타나지 않았다. 이상의 결과로 보아 RPE는 운동중 산소섭취량에 대한 운동강도의 예측에 남녀별 차이가 없어 유효한 예측인자라고 사료된다.

• Nutrition Research and Practice
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• 제16권5호
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• pp.646-657
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• 2022

BACKGROUND/OBJECTIVES: The doubly labeled water (DLW) method is the gold standard for estimating total energy expenditure (TEE) and is also useful for verifying the validities of dietary evaluation tools. In this study, we compared the accuracy of total energy intakes (TEI) estimated by the 24-h diet recall method with TEE obtained using the doubly labeled water method. SUBJECTS/METHODS: This study involved 71 subjects aged 20-49 yrs. Over a 14-day period, three 24-h diet recalls per subject (2 weekdays and 1 weekend day) were used to estimate energy intakes, while TEE was measured using the DLW method. The paired t-test was used to determine the significance of differences between TEI and TEE results, and the accuracy of the 24-h recall method was determined by accuracy predictions percentage, root mean square error, and bias. RESULTS: Average study subject age was 33.4 ± 8.6 yrs. The association between TEI and TEE was positive and significant (r = 0.463, P < 0.001), and the difference between TEI (2,084.3 ± 684.2 kcal/day) and TEE (2,401.7 ± 480.3 kcal/day) was also significant (P < 0.001). In all study subjects, mean TEI was 12.0% (307.5 ± 629.3 kcal/day) less than mean TEE, and 12.2% (349.4 ± 632.5 kcal/day) less in men and 11.8% (266.7 ± 632.5 kcal/day) less in women. Rates of TEI underprediction for all study subjects, men, and women, were 60.5%, 51.4%, and 66.7%, respectively. CONCLUSIONS: This study shows that 24-h diet recall underreports energy intakes. More research is needed to corroborate our findings and evaluate the accuracy of 24-h recall with respect to additional demographics.

• Journal of Nutrition and Health
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• 제56권1호
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• pp.86-96
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• 2023

본 연구는 서울과 경기도 지역의 중년여성 345명을 대상으로 우울증, 정서적 섭식 및 식생활과의 관련성을 분석하고 우울증과 식생활과의 관계에서 정서적 섭식의 매개효과에 대하여 알아보기 위해 수행되었다. 우울증 군별 영양지수 점수는 균형과 다양 및 식행동의 점수가 정상군보다 우울증군에서 낮았으며, 절제 점수는 정상군보다 우울증경계군과 우울증군에서 낮았다. 우울증 군별 정서적 섭식 점수는 정상군보다 우울증군에서 높았다. 우울증, 정서적 섭식 및 영양지수와의 편상관관계를 분석한 결과 우울증은 정서적 섭식과 양의 상관관계가 있었고, 영양지수의 모든 요인, 즉 균형, 다양, 절제, 식행동과 모두 음의 상관관계를 나타냈다. 정서적 섭식은 영양지수 요인 중 다양과 절제와 각각 음의 상관성이 있었다. 우울증과 영양지수와의 관계에서 정서적 섭식의 매개효과를 부트스트래핑을 적용하여 통계분석한 결과 우울증은 정서적 섭식을 매개체로 하여 영양지수 요인 중 절제에 음의 영향을 미치는 것으로 나타났다. 본 연구결과를 통해 우울증이 식생활 실천으로 연계되는 과정에서 정서적 섭식이 매개체로서 건강하지 못한 식품의 섭취에 영향을 미치는 것을 확인할 수 있었다.

• 한국식품영양과학회지
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• 제31권6호
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• pp.1035-1042
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• 2002

본 연구는 나트륨 섭취수준이 혈중 지질과 혈당에 미치는 영향을 규명해보기 위하여 정상 성인 여성 20명을 대상으로 고나트륨식과 저나트륨식을 각각 6일씩 공급한 후 혈중 지질, 혈당 및 기타 혈액성상의 변화를 비교분석하였다. 그 결과를 요약하면 다음과 같다. 연구대상자들의 평균연령은 22.9$\pm$2.5세였으며 평균 체중과 신장은 54.7$\pm$6.6kg과 160.0$\pm$4.8cm였고 수축기/이완기 혈압은 110.3$\pm$7.7/67.5$\pm$9.7 mm Hg로 정상범위에 속하였다. 나트륨 섭치수준에 따른 평균 체중의 변화는 고나트륨식이 54.7$\pm$6.4 kg으로 저나트륨식의 53.8$\pm$6.2 kg보다 유의하게 높았다(p<0.001). 평균 신장은 고나트륨식과 저나트륨식간에 유의한 차이가 없었으나, 이완기혈압은 고나트륨식(65.5$\pm$8.3 mmHg)보다 저나트륨식(60.8$\pm$8.6 mmHg) 이후 유의하게 감소하였다(p<0.05). 혈청 콜레스테롤,LDL-콜레스테롤,HDL-콜레스테롤 함량은 나트륨 섭취 수준에 따라 유의적인 차이를 보이지 않았으나 중성지질은 고나트륨식의 89.4$\pm$27.3 mg/dL보다 저나트륨식이시 73.8$\pm$12.5mg/dL로 유의하게 감소하였다(p<0.05). 혈청 아포 A-I은 고나트륨식의 183.7$\pm$32.7 mg/dL보다 저나트륨식에서 167.5$\pm$22.8 mg/dL로 유의적으로 감소하였으나(p<0.001), 아포 B는 고나트륨식의 83.3$\pm$13.9 mg/dL보다 저나트륨식에서 90.8$\pm$12.9 mg/dL로 유의하게 증가하였다(p<0.001). 아포 A-I/B는 저나트륨식이 1.9$\pm$0.2로 2.2$\pm$0.3을 보인 고나트륨식보다 유의하게 낮았으나(p<0.001),AI(atherogenic index)는 나트륨 섭취수준에 의한 영향을 받지 않았다 혈액 응고시간으로 thrombin time과 Prothrombin time은 저나트륨식이 각각 9.6$\pm$1.1초, 11.6$\pm$0.7초로 나타나 고나트륨식의 11.3$\pm$1.3초, 12.0$\pm$0.4초보다 유의하게 빠른 것으로 나타났다(p<0.001, p<0.05). 나트륨 섭취수준에 따른 혈당 농도는 고나트륨식과 저나트륨식 간에 유의한 차이가 없었으나, 인슐린 함량은 저나트륨식이 10.3$\pm$5.0 $\mu$IU/mL로 고나트륨식의 6.0$\pm$2.6$\mu$IU/mL보다 유의하게 높았다.(P<0.01). 이상의 결과를 종합할 때 저나트륨식에서 이완기 혈압, 혈청 중성지질, 아포A-1, 혈액 응고시간은 감소되었으나, 혈청 아포 B와 인슐린함량은 유의하게 증가되어 지속적인 저나트륨식 처방시 지질과 당질대사의 변화를 초래할 가능성이 있는 것으로 보여진다. 따라서 혈압 저하를 목적으로 하는 나트륨 제한식의 실시는 다양한 체내의 생화학적 변화를 고려해서 이루어져야 할 것이며, 앞으로 이에 대한 보다 다각적인 연구가 요구된다.