일부 직장 남성들의 운동형태가 심혈관질환의 위험 예측인자에 미치는 영향

이석인,김남진,Lee, Suk-In,Kim, Nam-Jin 대한예방의학회 2006 예방의학회지 Vol.39 No.6

Objectives : The purpose of this study was to gain an understanding of the effects of three exercise types on anthropometric and serum lipids and physiological index factors, which are known to be the three risk factors of cardiovascular disease in male workers. Methods : The experimental study period was 12 weeks. In this study, 30-40's males (N=31) were assigned to 3 experimental groups: regular aerobic(treadmill walking) exercise group, regular anaerobic(muscular endurance) exercise group, irregular aerobic & anaerobic exercise group and a control group using a stratified random assignment method. Results : In relation to anthropometric factors, the regular aerobic & anaerobic exercise groups showed significant decreases in Weight, Broca's index, WC, BMI, WHtR, WHpR and HRrest. With regard to the serum lipid factors, the TC was decreased, but the HDL-c increased among the regular aerobic & anaerobic exercise groups. However, no significant difference was found between the other groups in respect to the LDL-c and TG. Considering the physiological factors, the TC/HD-c, TC-HDL/HDL-c, LDL-C/HDL-c and NON-HDL-c ratios were decreased, but the HDL-c/TC ratio increased among the regular aerobic & anaerobic exercise groups. The TG/HDL-c and HDL-c/LDL-c ratios showed no significant differences between the groups. These results indicated that the positive change for each factor is much larger in the regular exercise groups, especially in the anaerobic exercise group. Conclusions : The results indicate that not only regular aerobic exercise, but also regular anaerobic(muscular endurance) exercise could be utilized in lessening the deleterious effects of the risk index factors for cardiovascular disease.

수퍼 써키트웨이트트레이닝과 써키트웨이트트레이닝이 여성의 신체구성과 심폐기능에 미치는 효과

이석인(Lee Suk In),이상연(Lee Sang Yeoun),이신언(Lee Shin Un),주희철(Joo Hee Chol),황종문(Hwang Jong Moon),이충일(Lee Chung ll) 한국사회체육학회 2000 한국사회체육학회지 Vol.14 No.-

This study has found the following results after analyzing the effects of super circuit weight training and circuit training on body composition and candiorespiratory functions before and after training. 20 female subjects were selected from "J" health center in Seoul and divided into 2 groups for super circuit weight training(G-1) and circuit training(G-2). The subjects participated in 12 week training program. 1. Comparison on body composition before and after training Body weight significantly decreased in both groups while Lean body mass increased in both groups without significance. % Fat and fat weight decreased significantly in both groups. The decrease rate and increase rate of body weight, % fat, fat weight, and lean body mass was higher in the super circuit weight training group(G-1) than circuit weight training group(G-2). 2. Comparison on blood pressure before and after training both groups showed significant decrease in systolic and diastolic blood pressure. But the decrease rate was higher in super circuit weight training group (G-1) than circuit weight training group(G-2). 3. Comparison on cardiorespiratory function before and after training Resting heart rate was significantly decreased in both groups with the decrease rate higher in the super circuit weight training group(G-1) than circuit weight training group(G-2). Signifcant increase of VO2 max was assessed in both groups and the increase rate of VO max was higher in Super circuit weight training group(G-1) than circuit weight training group(G-2). According to the results from the study significant changes to body composition, blood pressure and cardiorespiratory functions were assessed in both groups after training. Based on the findings above, where super circuit weight training group was found to be more effective, we'd recommand super circuit weight training program for effective weight reduction and improvement of cardiorespiratory functions.

건강운동 참여한 성인의 주관적 운동능력 인지와 열정, 운동 자기효능감, 지각된 건강상태 간의 관계

이석인(Suk In Lee),오은택(Eun Taek Oh),백광(Kwang Baik) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.43

The purpose of this study was to examine the effect of the subjective exercise ability and passion on exercise self-efficacy and perceived health in life sport participants. To process the data, this research conducted exploratory/confirmatory factor analysis, 2X2 MANOVA, reliability. correlation analysis, hierarchical multiple regression with SPSS 15.0 program and AMOS 6.0. The results of this research were as followings. First, this study didn`t find the differences between exercise self-efficacy and perceived health by subjective exercise ability in life sport participants. Also, Participants in the higher harmonious passion reported higher levels of exercise self-efficacy than did those in the low harmonious passion. Participants in the higher obsessive passion and harmonious passion reported higher levels of exercise self-efficacy and perceived health. Second, Harmonious passion of life sport participants had significantly positive influence on the exercise self-efficacy and perceived health.

급성 카페인 섭취가 고온 환경에서 운동 중 여자 대학생의 체액, 심박수 및 운동 자각도에 미치는 영향

이석인(Lee Suk-In),김대한(Kim Dae-Han),김태욱(Kim Tae-Wook) 한국체육과학회 2009 한국체육과학회지 Vol.18 No.1

This research was conducted with the purpose of finding the effects of caffeine ingestion(3㎎/㎏) on female college students regarding their body fluids, heart rate and RPE in a high temperature environment(30~32℃, humidity 40~60%) prior to working out. So 15 female subjects who did not have any side effects from caffeine were selected and placed randomly into 3 groups - 5 subjects each for Control, Placebo, and Caffeine group. All ingestion was carried out an hour prior to working out, then running was conducted on the treadmill for 40 minutes at 70% of each subjects VO2max after a 15 minute high temperature adaption phase. The weight, urine osmolality, urine specific gravity difference from pre/post workout was measured while the heart rate and RPE was measured every 5 minutes during the workout. The results showed that there was not a noticeable difference in the weight(p=.972), urine osmolality(p= .661) and urine specific gravity(p= .948) of the 3 groups(p=.972). There was also no significant difference in the increase of heart rate(p=.243) or RPE(p=.630) in the 3 groups either. So ingestion of 3㎎/㎏ of caffeine prior to working out in a high temperature environment does not have much effect on the loss of body fluids and shows that caffeine can be safely used as a sports performance supplement.

웨이트레이닝과 써키트 웨이트트레이닝이 신체구성 , 근력 , 심박수와 혈압에 미치는 효과

이석인(Suk In Lee) 한국사회체육학회 1999 한국사회체육학회지 Vol.12 No.-

This study analyzes the effects of weight training and circuit weight training on body composition, muscular strength, heart rate and blood pressure. 20 healthy male students were selected as subjects from `J` university in Seoul and Participated in a training program which was conducted for 12 weeks on the basis of every Monday, Wednesday, And Friday. The subjects were devided into two groups : weight training group(G-1 : N : 10) and circuit training group(G-2 : N : 10). The results obtained from the study are as follows. 1. Comparison of body composition before and after training Body weight and lean body mass measurements were significantly increased in both groups after training while increase rate was higher in the weight training group. A significant decrease in %fat measurements was observed in both groups with decrease rate higher in the circuit weight training group. After training, significant changed in body fat weight were assessed in the circuit weight training group but significant not changed in the weight training group. 2. Comparison of muscular strength, before and after training Grip strength, back muscle strength, bench press and leg press strength were significantly increased in both groups after training. Increase rate in strength measurements was higher in the weight training group than circuit weight training group. 3. Comparison of heart rate before and after training A significant decrease in resting heart rate was assessed in circuit weight training group after training whereas significant not decreased in the weight training group. 4. Comparison of blood pressure before and after training Systolic blood pressure was significantly decreased in both groups after training with decrease rate higher in the circuit weight training group. But diasolic blood pressure significantly not decreased in weight training and circuit weight training.

급성 카페인 투여가 스쿼시 선수들의 최대 등척성 근력에 미치는 영향

이석인(Lee Suk-In),김태욱(Kim Tae-Wook) 한국체육과학회 2008 한국체육과학회지 Vol.17 No.4

Caffeine has known ergogenic effects, some of which have been observed during isomeric contraction. We used 10 squash players(19.6±2.83yr, 62.4±6.05㎏) in a randomized, double-blinded, placebo-controlled, crossover design to experiment caffeine's ergogenic effects on maximal isometric strength on chest and leg. Subjects performed maximal isometric contractions of the chest press and leg extension 1 h after oral caffeine administration(6㎎/㎏). There were no significant differences between any of the treatments in maximal isometric strength on chest press(p=.821). Whereas there was a significant difference between treatments on leg extension(p=.025). This result from between treatments caffeine and control(p=.037). So our results support the contention that supplementation with caffeine will increase maximal isometric strength on not chest but leg extensor and future studies should examine these issues, in addition to testing the acute effects of various caffeine doses on performance during maximal strength, power, and aerobic activities.

밸런스 및 플라이오메트릭 트레이닝이 여자 역도 선수의 경기력에 미치는 영향

이석인(Suk-In Lee),정호은(Ho-Eun Jung) 한국엔터테인먼트산업학회 2012 한국엔터테인먼트산업학회논문지 Vol.6 No.4

본 연구는 역도선수들을 대상으로 플라이오메트릭 트레이닝과 밸런스 트레이닝이 선수들의 근력, 순발력, 등속성 근력에 어떠한 영향을 미치는지 비교하는데 목적이 있다. 연구대상은 중학교 2∼3학년 여자 역도선수 12명이며 플라이오메트릭 트레이닝과 밸런스 트레이닝, 역도선수 운동프로그램을 실시한 집단(6명)과 역도선수 운동프로그램만을 실시한 집단(6명)으로 무선배정하여 12주간의 훈련을 통해 측정 및 분석하였다. 근력 및 순발력, 근파워에서는 실험집단이 통제집단에 비해 수직높이뛰기, Press에서 사전보다 사후에 유의미하게 증가하였다(p<.05). 등속성 근력에서의 Extension Right의 체중당 최대파워(Peak TQ/BW)는 실험집단이 사전보다 사후에 유의미하게 증가하였고, Flexion Right의 체중당 최대파워(Peak TQ/BW)는 통제집단에서 사전보다 사후에 결과가 유의미하게 증가하였다(p<.05). 플라이오메트릭 트레이닝과 밸런스 트레이닝은 운동범위의 확대를 통해 부상을 방지하고 더 나아가 운동능력을 향상시키는데 영향을 줄 수 있는 효율적 훈련이 되리라 사료된다. The central concern of this article is to examine how and to what extent plyometric training and balance training influence athletes’ muscular power, agility and isokinetic muscular function. After randomly dividing 12 females weight-lifting athletes in a middle school into two groups, i.e., an experimental group (Ex-G, n=6) and a control group (Con-G, n=6), we measured whether plyometric training and balance training as treatment conditions for the pre and post test control group design have substantially enhanced athletes’ performance when these treatment conditions are added to a weight-lifting training program for 12 weeks. Findings from our experiment reveal that the EX-G showed more improvement in the athletic performance than the Con-G. Specifically, both vertical jump and press of the experimental group as a measure of muscular power and agility, respectively, were more significantly improved in pre and post comparison than those of the control group. With regard to isokinetic muscular function, the experimental group’s peak TQ/BW in extension right significantly improved, whereas the peak TQ/BW of Con-G in flexion right is markedly improved in pre and post test comparison. Plyometric and balance training could function as preventive measures against unexpected injuries on the one hand and effective training methods for enhancing athletic performance on the other.

고온 환경에서 신체활동 전 카페인 섭취가 성인 여성의 저체수분증에 미치는 영향

이석인(Suk In Lee),김대한(Dae Han Kim),김태욱(Tae Wook Kim) 한국사회체육학회 2010 한국사회체육학회지 Vol.0 No.41

This study aims to find out the effect of caffeine ingestion of college woman student on whole body loss volume (WBLV), tympanic temperature (Tty), serum osmolality (Osmserum), hemoglobin (Hb), hematocrit (Hct) change during 40 min of treadmill running exercise in the heat environment (31.2±0.71℃, relative humidity 42.2±5.4%). Thirty trained females (age; 21.9±2.03 yrs, height; 162.0±2.47 cm, weight; 51.95±2.61 kg) who routinely trained for approximately 5 hours·wk-1 were random assigment into three groups (control; CON-G, placebo; PLAC-G, caffeine; CAFF-G). WBLV following exercise was all groups and there was significant difference among the groups (p<.001), and higher in the CAFF-G. In the case of Tty, higher in the CAFF-G at 35-40 min but no significant difference among the groups depending on time (p=.748). The Osmserum (p=.149), Hb (p=.554) and Hct (p=.160) were not significant differences among the groups. In conclusion, it was confirmed that the 3mg·kg-1 caffeine ingestion of college woman students prior to exercising in heat environment does not stimulated on hypohydration. However, caffeine has the potential to negative affect on hydration status during 40 min over prolonged exercise.

고온 환경에서 카페인 섭취가 성별에 따른 근 통증 반응에 미치는 영향

이석인(Lee Suk-In),이정범(Lee Jeong-Beom),김태욱(Kim Tae-Wook) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.2

The current study investigated whether the sex difference on muscle pain following 3㎎/㎏-1 caffeine ingestion was explained by whole body sweat loss volume(WBSLV), muscle pain rating(MPR) and creatine kinase(CK) during pain task (backward walking, gradient -15%, 3㎞ㆍh-1, 85-88 stepsㆍmin-1, 30 min, room temperature 31-32℃ with 40-50% relative humidity). 28 college students volunteered for this investigation and randomized designed and divided into no caffeine (male-6, Con-M: female=7, Con-F) and intake caffeine groups (male-7, Caff-M: female=8, Caff-F). The WBSLV rate was significantly higher in Caff-F them Con-F (p<.05), but not male groups. The MPR was significantly decreased in Caff-F than Con-F at 5min (p<.01), 10min (p<.0l) and 15min (p<.05). However, CK was significantly higher in Caff-F than Con-F, not male groups. Our finding suggest that sex differences in nocicpetive transmission and neuronal sensitization via caffeine, but the lower MPR in female than male in this investigation cause not muscle damage parameters. Therefore, additional research is required to identify the parameters that influence the neurohumoral transmitter of sex difference following caffeine.

여자 국가대표 보디빌딩선수의 근력 , 심박수 , 산소섭취량 및 혈액 유형성분에 관한 연구

이석인(Suk In Lee),권만근(Man Geun Kwoen) 한국사회체육학회 2002 한국사회체육학회지 Vol.17 No.-

The purpose of this study was to compare with the muscle strength, heart rate, V˙O_2 and blood components of two groups, one group was a woman bodybuilding athlete of long-term of high-density weight training program, the other group was non-athlete woman during three-month weight training and to suggest effective weight training program in woman. The results are as follows ; 1. The muscle strength showed significantly with athlete group higher than non-athlete group in grip strength(left, right) and back strength. 2. Resting heart rate, HRmax and V˙O_2max showed significant difference between athlete group and non-athlete group. 3. Total cholesterol(T-CHL), LDL-C and CPK showed significant difference between athlete group and non-athlete group.