• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제23권2호
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• pp.49-56
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• 2012

Methylphenidate is a widely used stimulant for treatment of attention-deficit hyperactivity disorder (ADHD). In addition to core symptoms of attention and behavioral symptoms, methylphenidate is even effective for executive functions. However, abuse and misuse of stimulants, including methylphenidate, for the purpose of cognitive enhancement is an issue of concern worldwide. Some prejudices and misunderstandings against methylphenidate are popular ; however, little attention has been given to the neuropsychiatric evidence of methylphenidate for enhancement of cognitive function among healthy populations. In this article, our aim was to conduct a review of previous studies investigating the effect of methylphenidate in healthy populations. Findings from several recent studies have demonstrated the effectiveness of methylphenidate for enhancement of cognitive function in healthy populations. The mechanisms of cognitive enhancement are thought to be associated with motivation and the reward circuit in the brain. However, when considering the risk to benefit, an official discussion of the use of methylphenidate among healthy members of the population would be premature. Instead, investigation of epidemiological studies of the prevalence of misuse of stimulants among healthy members of the population, particularly adolescents and college students, is needed. In addition, based on achievements reported in previous studies, investigation of the effect of an approach using non-pharmacological enhancing motivation, which will in turn result in increased cognitive function would be helpful.

• 국제물리치료학회지
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• 제11권2호
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• pp.2090-2095
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• 2020

Background: Spinal Mobilization is one of the manual therapy technique that clinicians have used to treat pain, however, there is still a lack of research on changes in strength in healthy people. Objectives: To investigate the effect of posterior-anterior lumbar mobilization on lower limb strength in healthy individuals. Design: Two-group pretest-posttest design. Methods: In this study, 23 healthy subjects aged 20 years were assigned to 12 lumbar mobilization group (LMG) and 12 sham group (SG) to perform intervention and measurement through pre- and post-design. Intervention was performed in LMG with grade III~IV on L3-5 of the lumbar spine, and lumbar mobilization was performed for each segment. After intervention, knee flexion and extension strength were measured. To measure the main effect on muscle strength, a comparative analysis was conducted using paired t-test and independent t-test. Results: In LMG, knee flexor and extensor strength were increased significantly at 60°/s (P<.05). In addition, the extensors of LMG and SG were significantly different only at 60°/s, and the flexors were significantly different between groups at both 60°/s and 180°/s (P<.05). Conclusion: In healthy individuals, lumbar mobilization results in improvement of strength of knee flexor and extensor, and additional experiments on the effect of mobilization on the lumbar spine on functional changes in the lower limbs will be needed.

• Journal of Periodontal and Implant Science
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• 제24권3호
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• pp.572-580
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• 1994

The purpose of the present study was to evaluate the effect of platelet - derived growth factor(PDGF) - BB and insulin - like growth factor(IGF) - 1, Centella Asiatica, and Zea Mays L. on the mitogenic activity of PDL cells from healthy and RPP patients. Combination of PDGF - BB and IGF - 1, Centella Asiatica, and Zea Mays L. were treated on PDL cells and the mitogenic effects were meaured by quantitative assay of methyl - $^3H$ - thymidine incorporation during DNA synthesis. Combination of PDGF - BB and IGF - 1 enhenced the mitogenic effects of both healthy and RPP PDL cells, however, the effect was less pronounced on RPP PDL cells. In cases of Centella Asiatica and Zea Mays L., no mitogenic effect on healthy PDL cells could be noticed.

• Human Ecology Research
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• 제58권4호
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• pp.483-496
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• 2020

This study examined the effects of eating alone, meal type, and dietary lifestyles on healthy eating capability of one-person households. We analyzed the mediation effects of weekly frequencies of each meal type taken by one-person households between eating habits such as eating alone and dietary lifestyles of one-person households and healthy eating capability. We also analyzed data from the 2019 Food Consumption Behavior Survey using a sample of 688 one-person households. Factor analysis, latent profile analysis, structural equation model analysis was conducted; direct and indirect effects of independent variables were tested using bootstrap method. The major results were as follows. Frequency of eating alone was about 10 times a week on average; one-person households had home-made meals about 12 times a week, for restaurant meals, 4 times, for delivered/take-out food, 0.39 times, and for other types, 0.44 times. Weekly frequencies of eating alone and meal types taken by one-person households were significantly different among the different socio-demographic groups. Dietary lifestyle was classified into four classes: traditional, health ignorant, food lifestyle ignorant, and balanced. Eating alone and dietary lifestyle had a significant effect on weekly frequency of each meal type. Frequencies of eating alone, balanced dietary lifestyle, and taking home-made meals had a positive direct effect on healthy eating capability, and frequency of taking delivered or take-out food and food consumption ignorant lifestyle had a negative direct effect. Eating alone, balanced and traditional dietary lifestyles had a positive indirect effect through the meal type; however, watching Mug-bang had a negative indirect effect.

• 문화기술의 융합
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• 제10권2호
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• pp.11-16
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• 2024

최근, 규칙적인 운동이나 식단을 통해 건강을 관리하고 이를 SNS에 인증하는 헬시플레저(Healthy-pleasure) 트렌드가 MZ세대에 자리 잡고 있다. 이에 본 연구에서는 개인의 성격 특성이 건강관리 인증행위와 주관적 웰빙에 미치는 영향을 알아보았다. 그 결과, 먼저 1) SNS 인증 태도와 의도 모두에 유사비교 성향과 과시적 자기애가 정적인 영향을 미쳤으며, 하향비교 성향은 SNS 인증 변수 모두에 부적인 영향을 미쳤다. 다음으로, 2) 주관적 웰빙 모두에 사용자의 자존감이 긍정적인 영향을 미친 반면, 과시적 자기애는 스트레스에 부적인 영향을 미치고, 유사비교 성향은 만족감에 정적인 영향을 미쳤다. 즉, 유사한 사람들과의 비교는 대학생들의 건강관리 인증과 주관적 웰빙에 긍정적 영향을 미치지는 반면, 자기 존중이 아닌 자기 과시나 타인의 인정을 위한 건강관리는 오히려 그들의 주관적 웰빙에 부정적 영향을 미침을 확인할 수 있었다. 이러한 본 연구의 결과는 2030세대를 겨냥한 마케팅 시장뿐만이 아닌 MZ세대가 건강한 삶을 영위 할 수 있는 미디어 및 문화 환경을 위해 적극 반영 되어야 할 것이다.

• 한방재활의학과학회지
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• 제18권1호
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• pp.125-140
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• 2008

Objectives : The purpose of this study was to investigate the effect of Progressive Muscle Relaxation(PMR) on stress and muscle relaxation in healthy people. Methods : Sample group of 14 healthy subjects had been treated by progressive muscle relaxation for 10 days. Control group of 14 healthy subjects were not treated during the same period. Outcomes were assessed by Meridian-Electromyograph(MEMG), Heart Rate Variability(HRV), Stress Reaction Inventory(SRI). Results : The contraction and fatigue of erector spinae muscle by MEMG had decreased significantly in Sample group. There was no significant difference between two groups in the HRV and SRI. Conclusions : Further studies analysing PMR effect on stress and muscle relaxation are needed.

• 한국산학기술학회논문지
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• 제11권2호
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• pp.780-785
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• 2010

본 연구는 어느 중소도시의 주민을 대상으로 무작위 표본 추출하여 전화로 건강생활실천 행태를 소득계층별로 파악하고 관련요인을 분석하였다. 특히 보건소의 건강증진사업에 대한 긍정적인 인식도와 건강생활실천 행태와의 관련성을 분석하고자 하였다. 한국갤럽(주)을 통해 2006년 10월 11일에서 13일까지 3일간 일개시 19세에서 69세까지의 809명의 주민을 표본추출하여 이들을 대상으로 전화설문조사를 시행하여 자료를 분석하였다. 분석결과 소득계층이 낮은 사람들은 보건소의 건강증진사업에 대해 긍정적인 인식을 갖는 것과 건강생활실천의 관련성이 낮았으나 소득계층이 높은 사람들은 관련성이 높게 나타났다. 이는 소득계층에 따라 보건소의 건강증진사업이 미치는 영향이 다름을 시사한다.

• 가족자원경영과 정책
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• 제17권4호
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• pp.85-100
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• 2013

The purposes of this study are to explore the effect of the network characteristics of Healthy Family Support Center on its performance, and also to investigate the mediating effect of the organizational properties on the performance. We used the data from 148 healthy family support centers in National Survey in Korea. The analytic sample for this study consists of 102 responses.(response rate=68.9%) Multivariate regression model estimated the effects of the network's structural, interactive and functional characteristics and the interaction between the network's characteristics and organizational properties on the performance The findings of this study demonstrate that healthy family support centers with higher closeness centrality and with better functional characteristics reported more performances. Moreover, Centers that are more independent in organizational properties showed higher performances. However, the findings did not show that the interaction between the network's characteristics and organizational properties mediates on the performance.

• The Journal of Korean Physical Therapy
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• 제18권4호
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• pp.51-60
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• 2006

Purpose: This study was to compare the effect of center of pressure(COP) displacement and muscle activation onset during expected and unexpected sudden limb loading in subjects with low back pain and healthy control subjects. Most studies of COP displacement and muscle activation onset on postural task focused on sudden trunk loading or gross limb movements. Investigation of the COP displacement and muscle activation onset during expected and unexpected sudden upper limb loading deserves similar attention. Methods: For this study, 14 subjects with low back pain and 12 healthy control subjects are participated. Force plate and surface EMG measures were used to determine COP displacement and muscle activation onset under expected and unexpected sudden upper limb loading. Results: COP displacement and muscle activation onset under unexpected sudden upper limb loading were similar in subjects with low back pain and healthy control subjects. However, COP displacement and muscle activation onset under expected sudden upper limb loading were shortened in healthy control subject but not among the subjects with low back pain. Conclusion: The results provide evidence for impaired feed-forward control in subjects with low back pain.

• 한국식생활문화학회지
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• 제27권1호
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• pp.1-11
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• 2012

This study investigated the effects of a healthy image on the preference and intake frequency of meat and animal products. The study looked into beef, pork, chicken, sausage, mackerel, cutlass fish, croaker, tuna, squid, shrimp, clams, fish cakes, eggs, milk, yogurt, ice cream, and cheese. A total of 359 usable surveys given to elementary school students, college students, and adults were collected using a convenient sampling method. While milk had the healthiest image, sausage had the least healthy image. The respondents preferred yogurt the most and sausage the least. The intake frequency of eggs was the highest and clams the lowest. The healthy image, preference, and intake frequency for all studied foods showed significant differences across both gender and age. The relationship between healthy image and preference was significant for all foods, and a healthy image always had a positive influence on preference. The relationship of healthy image and intake frequency was significant in 14 foods except for mackerel, cutlass fish, and tuna. Also a healthy image created a positive effect on the intake frequency of 14 foods.