The effects of aerobic exercise and resistance exercise on brain nerve growth factors in children

편미영,김현준 한국운동영양학회 2012 Physical Activity and Nutrition (Phys Act Nutr) Vol.16 No.3

The purpose of this study was to investigate the effects of aerobic exercise and resistance exercise on brain nerve growth factors in children. The subjects of this study were 20 males aged from 8 to 9, who were divided into aerobic exercise group (AEG, n = 7), resistance exercise group (REG, n = 7) and control group (CG, n = 6). The aerobic exercise and resistance exercise program conducted 50 minutes per day, three times a week, for 12 weeks, and applied exercise equivalent to 12-13 RPE during the first period (week 1-2) and exercise equivalent to 14-15 RPE during from second periods to fifth periods(week 3-12). The results of comparative analysis are as follows; BDNF(brain-derived neurotrophic factor) was a significant increased after 12 weeks in aerobic exercise group, resistance exercise group and control group. As to the comparison of means difference before and after intervention between group, resistance exercise group more increase than control group. Serotonin was a significant increased after 12 weeks in each group but not different between groups. Cortisol was not significant different after 12 weeks in each group and between groups. The brain nerve growth factors were not different between aerobic exercise and resistance exercise.

Physical Fitness and Brain Electrocortical Activity During Learning Process

편미영,김현준 한국자료분석학회 2011 Journal of the Korean Data Analysis Society Vol.13 No.4

This study attempted to verify how physical fitness influenced brain electrocortical activity in elementary school students. Students’ five physical abilities were measured including muscular endurance, muscular strength, speed, flexibility, and aerobic endurance ability. Brain waves were measured in two different situations; while brain was at rest and at learning. The relationship between physical fitness and brain waves were analyzed. First, no statistical significance was found in all variables between physical fitness and brain activity while subjects were at rest. Second, while subjects were in learning process, there was a negative correlations statistical significance (p=.017) between SMR waves in the left side of the brain and aerobic endurance ability. There was also a negative correlations statistical significance (p=.007) between beta waves in the left side of the brain and aerobic endurance ability. There was a negative correlations statistical significance (p=.031) between beta waves in the right side of the brain and muscular strength. In conclusion, the “at rest” condition gives no rise of any brain electrocortical activity, despite how high the individual’s physical fitness level is. In addition, students with superior ability in aerobic endurance and muscular strength have comparatively much lower psychological loads and stress.

체력강화 준비운동이 아동의 신체조성과 체력에 미치는 영향

편미영,곽이섭,김현준 한국자료분석학회 2010 Journal of the Korean Data Analysis Society Vol.12 No.6

The purpose of this study was to analyze the effects of warming-up with resistance training(10min/day, 3days/week, 16weeks) on the body composition and physical fitness in children. The subject was 61 children(experimental group 42, control group 19) at the S elementary school student. The result of this study are as follows; The %fat(p<.05), %LBM (p<.05), BMI(p<.05) and standing long jump(p<.01) were significantly difference between group in the total subject. The height(p<.01) and standing long jump(p<.01) were significantly difference between group in the boy group. The sit-ups(p<.05) and standing long jump(p<.05) were significantly difference between group in the girl group. In conclusion, warming-up with resistance training led to improve on the %fat, %LBM, BMI, standing long jump in children. 본 연구는 체력강화 준비운동의 효과를 알아보고자 16주 동안 체력강화 준비운동과 정적 준비운동을 실시하여 신체조성과 체력의 변화를 비교 분석하였다. 실험 대상자는 초등학교 6학년 61명을 선정하여, 이들 중 42명은 체력강화 준비운동군, 19명은 정적 준비운동군으로 분류하였다. 16주 동안 주 3회의 같은 체육수업 내용에 체력강화 준비운동과 정적 준비운동을 그룹별로 달리 실시한 후의 신체조성과 체력의 변화를 비교 분석하였다. 측정 결과 모든 대상자의 집단간의 신체조성과 체력의 변화를 비교한 결과 체지방률(p<.05), 제지방률(p<.05), BMI(p<.05), 제자리멀리뛰기(p<.01)에서 통계적으로 유의한 집단간 차이가 있는 것으로 나타났다. 또한 남학생 내에서는 신장(p<.01)과 제자리멀리뛰기(p<.01)에서 여학생 내에서는 윗몸일으키기(p<.05)와 제자리멀리뛰기(p<.05)에서 통계적으로 유의한 집단간 차이가 있는 것으로 나타났다. 그리고 체력강화 준비운동을 실시한 대상자 중 남학생과 여학생의 체력강화 준비운동 효과를 비교한 결과 신장(p<.01), 제자리멀리뛰기(p<.05)에서 통계적으로 유의한 집단간 차이가 있는 것으로 나타났다. 본 연구를 통해서 체력강화 준비운동은 체력강화 준비운동이 정적 준비운동보다 아동의 체지방률 감소, 제지방률 증가, BMI 감소, 제자리멀리뛰기(순발력) 향상에 효과적임을 알 수 있었다.

저항운동이 아동의 혈중지질 및 성장관련인자에 미치는 영향

편미영(Mi Yeong Pyeon),박민권(Min Kwon Park),김현준(Hyun Jun Kim) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.44

The purpose of this study was to find out the effects of a 12-week elastic band exercise on health-related fitness and blood lipids in 4th grade elementary male students. Sixteen subjects were participated in this study from one elementary school in Busan. Participants were randomly allocated to experimental group(n=8) and control group(n=8). Experimental group conducted 50 minutes of elastic band exercise three days a week with 11 to 15 Rating of Perceived Exertion (RPE) for 12 weeks, and the control group continued their normal life. In experimental group, lean body mass, percent body fat, cardiovascular endurance, and muscular endurance were all significantly improved after the program, but muscle strength, flexibility were not changed. While in control group, percent body fat and muscular endurance were significantly improved. There were significant interaction effects (group by time)of cardiovascular endurance, and muscular endurance between groups after the program. Group analyses showed that there were no significant difference in all blood lipids (T-C, TG, HDL-C and LDL-C) within group and between groups after program. These results indicate that elastic band exercise is effective to improving cardiovascular endurance, and muscular endurance in normal elementary male students. However, long-term follow up studies are necessary to clarify moderate exercise intensity of the elastic band exercise for normal elementary male students.

경영성과가 최고경영자 교체에 미치는 영향에 대한 실증분석: 최고경영자 유형에 따른 분석

편미영 ( Mi Young Pyeon ),최국현 ( Kuk Hyun Choe ) 한국생산성학회 2011 生産性論集 Vol.25 No.4

This study investigates empirically the relationship between firm performance measures and CEO changes. Analyses were carried out using 6,071 observations of firms listed in the Korea Stock Exchange during the period 1999-2010. The firm performance measures used in this study includes a number of financial ratios representing profitability, asset turnover and financial structure. The mean analysis and the logit analysis were employed to test hypotheses. This paper concludes that bad firm performance measures result in CEO changes. This result suggests that CEO turnovers are affected by various financial performances. Further, we find that owner CEOs are less likely to be replaced than professional CEOs when firm performance is relatively poor. Further, analyses report that CEO turnovers more frequently occur from professional CEOs to owner CEOs when firms have relatively good performance. These findings suggest that in Korea corporate governance may not still function appropriately when owners dominate corporate policy.

최고경영자 유형에 따른 경영성과가 최고경영자 교체에 미치는 영향

편미영 ( Mi Young Pyeon ),최국현 ( Kuk Hyun Choe ) 국제지역학회 2014 국제지역연구 Vol.18 No.4

본 연구는 1999년부터 2012년까지 한국증권거래소에 상장되어 있는 우리나라 기업을 표본으로 하여 최고경영자유형에 따른 경영성과와 최고경영자 교체유형간의 관계를 총 7,170개 의 기업-연도 자료로 실증분석 하였다. 최고경영자 교체유형을 ①비지배전문경영자인 전문경 영자간의 교체, ②지배주주인 소유경영자간의 교체, ③지배주주인 소유경영자에서 전문경영 자로의 교체, ④전문경영자에서 지배주주인 소유경영자로의 교체로 총 4가지 경우의 수로 나누어, 기업의 재무적 성과가 최고경영자 세부유형에 따라 최고경영자변경에 어떠한 영향을 주는지 평가하기 위하여 평균차이검정과 로짓분석을 실시하였다. 연구결과, 다른 3가지 교체유형보다 전문경영자간의 교체빈도가 월등히 높았으며, 교체이전 소유경영자 경영기업에 비하여, 전문경영자 경영기업의 경영자교체가 재무적 성과에 더민감 하게 영향을 받았다. 최고경영자의 세부유형별로 경영성과가 각각의 최고경영자 교체유형에 미치는 차별적인 영향을 분석한 결과, 교체이전 최고경영자가 소유경영자인 기업은 재무적 성과가 더 낮을 때 전문경영자를 영입하는 형태로 최고경영자를 교체하는 반면, 교체이전 전 문경영자가 경영하고 있는 기업은 성과가 낮더라도 기업의 재무상태가 건전하고, 기업자원이 효율적으로 운용될 때에는 지배주주는 직접 자신이 경영에 참여하는 형태로 최고경영자를 교 체하는 것으로 나타났다. This study carried out an empirical test on a total of 7,170 companies listed on Korea Stock Exchange between 1999 and 2012 to demonstrate the correlation between business performance and CEO turnover by CEO type. The types of CEO turnover were divided into 4: i) replacement from non-ownership controlling professional CEO to professional CEO, ii) replacement between ownership controlling CEOs, iii) replacement from ownership controlling CEO to professional CEO and iv) replacement from professional CEO to ownership controlling CEO. And the present study examined the impact of financial performance on the turnover by CEO type. The findings of this study are as follows. The turnover frequency of professional CEO was much higher than any other 3 types of CEOs. And professional CEO turned out to be more affected by financial performance than ownership controlling CEO before replacement. The analysis was conducted to know the impact of business performance on CEO replacement by type of replacement. The result showed that the company of which CEO has ownership of it before turnover replaced the CEO with professional CEO when financial performance is low while the company of which CEO does not have ownership before turnover replaced the CEO with a dominant stockholder when financial performance is sound and company resources are efficiently operated even though business performance is low.

유산소운동이 여자 아동의 뇌세포 생성 관련인자에 미치는 영향

Mi-Young Pyun(편미영),Han-Sam Cho(조한샘),Jae-Young Jeon(전재영),Jong-Won Kim(김종원),Kyung-Hee Lee(이경희),Chun-Kyu Lim(임춘규),Tae-Un Kim(김태운),Hyun-Jun Kim(김현준),Yi-Sub Kwak(곽이섭),Ki-Jun Ko(고기준) 한국생명과학회 2010 생명과학회지 Vol.20 No.6

운동은 신경의 생성, 적응, 보호 기능을 통해 뇌 기능 및 생성에 긍정적인 영향을 미치며, 유산소운동은 뇌신경 성장인자(GH, IGF-1, estrogen, serotonin)를 변화시키는 것으로 보고되었다. 본 연구는 여자 아동의 뇌기능 발달 및 뇌세포 생성 유도인자의 유산소운동 효과를 알아보고자 유산소운동 프로그램에 따른 뇌신경 성장인자(GH, IGF-1, estrogen, serotonin)의 변화를 분석하여 다음과 같은 결론을 얻었다. 반복측정 분산분석에 의해 운동군과 대조군의 평균을 비교한 결과 유산소운동은 집단간 유의한 차이를 보이며 체중, BMI, 체지방량, 체지방률을 감소시켰으며, 제지방률을 증가시켰다. 또한 뇌신경 성장인자인 serotonin을 감소시켰으며, GH와 IGF-1을 증가시켰다. 본 연구결과 유산소운동 프로그램이 아동의 체중, BMI, 체지방, 체지방률 감소와 제지방률 증가에 효과적이다. 또한 serotonin이 운동 후 감소된 결과를 볼 때 유산소운동 프로그램이 아동의 중추피로 감소에 효과적이며, GH, IGF-1의 운동 후 증가된 결과를 볼 때 유산소운동이 아동의 뇌기능 발달 및 뇌세포 생성 유도에 긍정적인 프로그램임을 알 수 있다. Exercise can favorably influence brain plasticity by facilitating neurogeneration, neuroadaptivity, and neuroprotection. Aerobic exercise has been reported to change brain nerve growth factors (growth hormone, insulin like factor-1, estrogen and serotonin). The purpose of this study was to demonstrate the effects of aerobic exercise for 12 weeks on brain nerve growth factors in girls. Fourteen female participants in elementary school grades 1 through 3 were randomly allocated to the exercise group (EG, n=6) and control group (CG, n=8). The EG participated in 60 minutes of modified ballet exercise as aerobic training three days a week for 12 weeks. Based on comparison between groups by two-way ANOVA with repeated measures, aerobic exercise program participants experienced decreased weight (p<0.01), BMI (p<0.01), fat mass (p<0.001), fat percent (p<0.001) and increased LBM (lean body mass) percent (p<0.001). In addition, we detected that aerobic exercise decreased the level of serotonin (p<0.05) and increased the level of GH (p<0.05) and IGF-1 (p<0.05). These findings suggest that aerobic exercise programs can be an efficient intervention to change body composition, alleviate central fatigue, improve brain function, and induce brain cell proliferation in girls.

댄스스포츠 중 차차차와 자이브가 중년여성의 유산소 운동능력과 혈중지질에 미치는 영향

김태운,편미영,김순경,조한샘 釜山大學校 附設 體育科學硏究所 2010 體育科學硏究所 論文集 Vol.26 No.-

본 연구는 댄스스포츠 중 차차차와 자이브 종목이 중년여성의 유산소 운동능력과 혈중지질에 미치는 영향에 대하여 알아보기 위해 실시하였으며, 연구대상자는 중년여성 18명(운동군; 9, 통제군; 9)을 12주, 주 3회, 1일 60분, 40-60% HRR과 꼐ㄸ 12-14 강도로 실시하였다. 측정항목은 유산소성 운동능력(V emax, VO2max(p<.001), VO2max(P<.05), 체중당 VO2max(P<.001), HRrest(p<.001)은 그룹과 시기간 유의성이 나타났으며, HRmax(p<.05)에서도 유의성이 나타났다. 두번째, 혈중지질은 T-C(P<.01), HDL-C(P<.01), LDL-C(P<.001)은 그룹과 시기간에는 유의성이 나타났으나 TG는 변화하지 않았다. 이상의 결과를 볼 때, 규칙적인 댄스스포츠는 신체의 기능 및 건강증진에 관계되는 유산소 능력과 혈청지질에 긍정적 변화를 가져왔고, 중년여성의 건강을 증진시키는데 효과적인 것으로 사료된다.

발레 프로그램이 아동의 신체조성, 체력과 성장관련 인자에 미치는 영향

김태운(Tae Un Kim),유수연(Soo Yeon You),전재영(Jae Young Jeon),편미영(Mi Yeong Pyeon),김현준(Hyun Jun Kim) 한국사회체육학회 2010 한국사회체육학회지 Vol.0 No.42

The purpose of this study was to investigate the effect of ballet program on body composition·physical fitness·growth-related factors in elementary school female students. The subjects of this study were 15 females aged from 7 to 8, who were divided into experiment group(n=7) and control group(n=8). The ballet program conducted on 7 subjects(experiment group), 60 minuets per day, three times a week, for 12- week, and applied exercise equivalent to RPE 11-14. The results of comparative analysis are as follows; As to the interaction effect between group and period according to factors, a significant difference was observed in GH, IGF-1. As to change in body composition, physical fitness, growth-related factors correlation showed a significant positive correlation in variables including IGF-1 and balance, flexibility and lean body mass, but showed a significant negative correlation in variables including flexibility and fat mass, flexibility and %fat. In conclusion, the result of this study show that ballet program improves body composition, flexibility, GH, IGF-1 in elementary school female students. It is considered that ballet program give positive effects for promoting their growth and development.