체중감량기간에 따른 복싱 선수의 일반혈액성분 및 유ㆍ무산소 운동능력 비교연구

천길영(Chun Kil-Young),오인석(Oh In-Suk) 한국체육과학회 2003 한국체육과학회지 Vol.12 No.2

The purpose of this study was to investigate the effect of 5% short and long terms weight reduction period on cell blood count and aerobic and anaerobic capacity. Fourteen Boxing athletes were matched and randomly placed into either short terms weight reduction (n=7) or long terms weight reduction (n=7) period. Short (long) terms body weight reduction period consisted of 5 day and 30 day weight reduction period respectively. Weight reduction period did not change fat (%). There are no significant difference on cell blood count and immune function between short- and long weight reduction period. In aerobic and anaerobic power test, long term weight reduction group showed no significant decrease but short term weight group decreased significantly. In conclusion, two different weight reduction method did not lead the change of biological variable (hemoglobin, hematocrits and immune function). Aerobic and anaerobic capacity decreased significantly after short term weight redection, but long term weight loss did not change with weight reduction. Therefore it was suggested that long term weight reduction was more effective way than short term one to prevent decreased exercise capacity.

Effects of Rapid Weight Reduction on Electrolytes in Middle School Taekwondo Players

Kim, Kyeong-Lae,Jun, Tae-Won,Woo, Jae-Hong,Park, Ik-Ryeu,Kwon, Yoon-Bang,Park, Jae-Hong,Han, Hyeong-Ju 한국체육무용국제교류학회 2002 한국체육무용국제교류학회지 Vol.8 No.-

The purpose of this study was to investigate the effects of rapid weight reduction on electrolytes in middle school Taekwondo players. Subjects were tested on two consecutive days of two times(3%, 5% weight reduction). On time one, concentration of electrolytes(Na^+, K^+, CI^-) in subjects were measured three times; 1)before weight reduction(pre); 2)right after a 5% weight reduction(post) by exercise and reducing food; 3)after 15hours of weight reduction(rec). On time two, the same method time one were measured three times of 3% weight reduction. On the basis of the results analyzed in this study and consideration of pre-studies related that, the conclusion could be drawn as follows. First, Data analysis of 3% weight reduction on Na^+, no significant difference between pre and post, but 3% weight reduction, post revealed more significant increase than pre(p<.05), and both of the two returned to pre level within 15hours during recovery. Second, Data analysis of 3% weight reduction on K^+, post revealed more significant increase than pre(p<.05), and returned to pre level within 15hours during recovery. 5% weight reduction, more significant increase than pre remarkably(p< .01), and did not return to pre level within 15hours during recovery. lastly, Data analysis of 3% weight reduction on CI^-, no significant difference between pre and post, and returned to pre level within 15hours during recovery. Otherwise, 5% weight reduction, post revealed more significant increased than pre(p< .05) and returned to pre level within 15hours during recovery. It was conclusion that rapid weight reduction increased concentration of electrolytes (Na^+, K^+, CI^-). For Taekwondo players, weight loss is very important element that can influence winning or losing easily. Especially, adolescents in a growth phase, inefficient and unreasonable weight reduction might be very harmful that can ruin the both the player's growth and their health. Therefore; trainers and coaches need to make a scientific and customed weight loss program so that an effective weight loss can be achieved in the long run.

체중감량이 태권도 선수의 운동능력과 면역반응에 미치는 영향

박계순,박익렬 한국운동과학회 2004 운동과학 Vol.13 No.1

박계순, 박익렬, 체중감량이 태권도 선수의 운동능력과 면역반응에 미치는 영향. 운동과학, 제13권 제1호, 65-76, 2004. 본 연구의 목적은 태권도 선수들을 대상으로 1주일의 감량기간 동안 2일 간격으로 자기체중의 0%(0kg), 3%(약 2kg), 6%(약 4kg), 9%(약 6kg)를 감량했을 때 선수들의 무산소성 운동능력, 유산소성 운동능력, 면역반응에 미치는 영향을 규명하여 적절한 체중감량과 경기력 향상에 필요한 자료를 제공하는 데 있다. Y 대학교 경력 6년 이상의 태권도 선수 8명을 대상으로 운동, 식이조절, 발한 방법으로 체중감량을 실시하였으며, 운동능력의 측정은 Wingate test와 트레드밀 달리기를 이용하였다. 자료 처리는 반복측정 분산분석(repeated measure ANOVA)을 이용하였으며, 각 측정 시기간의 차이 분석을 위해 대비검정(contrast test)을 실시하였다. 최대 무산소성 파워와 평균 무산소성 파워, 최저 무산소성 파워는 3% 감량 시기까지는 증가하다가 그 이후 6%와 9% 감량 시기에서는 유의하게 감소하였다. 최대산소섭취량은 3%와 6% 감량시기에서 유의하게 감소되었으며, 운동지속 시간은 지속적인 감소 경향을 보였으나, 0%와 9% 감량 시기 사이에서는 유의하게 감소하였다. 백혈구수는 6%까지 계속 감소하다가 9%에서 약간 증가하였다. B 세포와 T 세포, 보조 T 세포, 보조 T 세포/억제 T 세포 비율은 6%까지 증가하다가 9%에서 약간 감소하였다. NK 세포는 6%까지 유의하게 감소하다가 9% 시기에서 약간 증가하였다. 결론적으로 태권도 선수들에 있어 운동능력과 면역반응의 측면에서 부정적 영향이 최소한으로 감소되고, 면역반응이 경기 전ㆍ후 최상의 상태가 되기 위해서는 무산소성 운동능력은 3%, 유산소성 운동능력과 면역반응은 약 6%(약 4kg) 정도를 감량하는 것이 가장 바람직한 것으로 나타났다. Park, K.S., Park I.R. The Effect of Weight Reduction on Exercise Capacity, Immune Response of Taekwondo player. Exercise Science, 13(1): 65-76, 2004. The purpose of this study, was subjected to Taekwondo players weight reduction each time in 0%, 3%, 6%, 9%, weight reduction for a week(two days intervals) so as to examine closer the effect on changes Aerobic Exercise Capacity, Immune Response to provide necessary data for the right weight reduction and improvement of play performance. The subjects were 8 Taekwondo players, who have excellent practical skills and have more than 6 years experience, executed weight reduction through the exercises, dietaries and exhalation of sweat as 'Y' university. The methods to measure Exercise Performance were cardiopulmonary endurance test by treadmill, Wingate test by Ergometer and the data were handled by repeated measure ANOVA and executed contrast test to analyze the differences each time of weight reduction. As reduced weight Maximal Anaerobic Power, Mean Anaerobic Power and Minimal Anaerobic Power were increased slightly in 3%, weight reduction but it decreased significantly in 6%, and 9%, weight reduction. ??O_(2)max decreased significantly in 3% and 6% weight reduction, Exercise Duration had a tendency to decrease each time weight reduction and decreased significantly between 0%, and 9%. WBC Count was shown decreases with weight reduction by 6% weight reduction and slight increased in 9% weight reduction. B, T, Th/Ts ratio were increase by 6%, but slight decreased in 9% weight reduction. NKcell was decreased significantly by 6% and increased in 9% weight reduction. Therefore, In terms of Anaerobic Capacity are 3%, Aerobic Capacity and Immune Response are 6%(4kg) being considered of self-weight reduced body's best level for weight reduction in Taekwondo players.

체중감량기간에 따른 뇨전해질, 혈중젖산, 혈압, 심박수의 변화

민경선,김형렬,배기열,임미경,민진아 慶山大學校 1999 論文集 Vol.17 No.1

The purpose of this study to investigated the effects of wrestling' weight loss on urine electrolyte (Na+, K+). blood pressure, blood lactate, heart rate. Twenty one subjects participated in this study and reduced approximately 7% per body weight. The subject was divided short period weight reduction (n=6) during 7day, long period weight reduction (n=6)during 14day. Urine sample extracted 20 ml for electrolyte analysis from pre-, post body weight reduction, recovery (Iday later), Similarly blood pressure measured. For measuring heart rate, lactate, subject performed anaerobic power test during 30 second, measuring immediately, 3, 6, 9.15 minute' recovery period. The result following: Short terms weight reduction group showed no significant different in body composition (LBM and fat %) but long terms weight reduction group was significantly reduced lean body mass after weight reduction but did not change fat. The content of urine Na+ and K+ decreased significantly after body weight reduction in both group, In recovery period, urine K+ did not show any variation in both group. Urine Na+ returned to base line during recovery period in long term body weight reduction group, but these changes was not statistically significant. Blood lactate concentration decreased significantly in both group after body weight reduction and did not show any difference with exercise and recovery period between long- and short terms weight reduction period. Blood pressure and heart rat did not show any difference. In conclusion, weight reduction of wrestling caused the change body composition, electrolyte and lactate and short terms weight reduction may detrimental effects body' homeostasis.

레슬링 선수의 급속감량이 신체조성, 혈액성분 및 혈액 유동성에 미치는 영향

이종영(Lee, Jong-Young) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.6

An effect of rapid weight reduction on body composition, blood components and blood rheology variables were rarely studied. Therefore, we monitored the alteration in body composition, blood components and blood rheology assessed by MC-FAN(Micro Channel Array Flow Analyzer) variable in six healthy Korea D college female wrestlers(20.2+_1.8 years of age) before and after the rapid weight reduction. Body composition, blood components, whole blood passage time measured by MC-FAN variables were analyzed before and after 2% of rapid weight reduction on 150 minutes training. Reduction in body weight and BMI, serum concentrations of WBC, Plt, Fe, TP, Alb, T-bil, ALT, LDH, UN, Cre, UA, Na, Cl and IP significantly increased after the 150 minutes training compared with the levels before weight reduction. In contrast, body weight, MCV, UIBC and TG significantly decreased after training compared with the levels before weight reduction. There was no statistical difference on whole blood passage time before and after rapid weight reduction. This research indicates two important findings: reducing two percent of body weight of wrestlers by rapid short-time perspiration has a strong possibility of hypertonic dehydration; in this case because the homeostasis of the circulating blood elements within a blood vessel is maintained, the change in whole blood passage time is not measured. According to the result, it is safe to reduce the weight in short period of time under 2%. However,it is highly recommended to monitor wrestlers health being based on detailed condition of loosing weight, nutrition balance and total body fluid since most of wrestlers tend to limit 3% of their consumption of water and diet from two weeks before the competition. Then they also attempt to lose 2% of their weight in a short period of time just before the weight-in day.

Weight reduction does not induce an undesirable decrease in muscle mass, muscle strength, or physical performance in men with obesity: a pilot study

( Bokun Kim ),( Takehiko Tsujimoto ),( Rina So ),( Xiaoguang Zhao ),( Sechang Oh ),( Kiyoji Tanaka ) 한국운동영양학회 2017 Physical Activity and Nutrition (Phys Act Nutr) Vol.21 No.4

[Purpose] To date, there have been no reports on whether weight reduction causes decreases in muscle mass, muscle strength, or physical performance that could lead to health problems. Thus, in this pilot study, we investigated the appropriateness of the changes in muscle mass, muscle strength and physical performance after weight reduction. [Methods] Obese men who completed a weight reduction program to decrease and maintain a body mass index (BMI) of less than 25 kg/m2 for one year were recruited for the study. One year after the completion of a weight reduction program, the participants’ muscle mass, muscle strength, and physical performance were compared with those in a reference group composed of individuals whose BMI was less than 25 kg/m2. Whole-body scanning was performed using dual-energy X-ray absorptiometry to analyze muscle mass. Handgrip strength and knee extensor strength were measured to evaluate arm and leg muscle strength, respectively. For physical performance, a jump test was employed. [Results] The results showed that the biceps, triceps, subscapular, and suprailiac areas of professional fashion models were significantly thinner than those of women in general (p<.001), and that their waist size was also significantly smaller (p<.001). However, hip circumference showed no significant difference. Body mass index, waist-to-hip ratio, and body fat (%) in professional fashion models were significantly lower than those in women in general (p<.001), while the body density in professional fashion models was significantly greater (p<0.001). [Conclusion] Weight reduction participants showed an average reduction in body weight of -16.47%. Normalized arm muscle mass and handgrip strength were significantly greater in the weight reduction group than in the reference group; however, no significant differences were detected between the two groups with respect to the other variables. After one year, there were no significant differences between the two groups.

1년간 체중감량 노력을 한 대상자들에서 성공적인 체중감량과 관련된 요인: 국민건강영양조사 제6기(2015년) 자료

정호근 ( Ho-geun Jung ),정휘수 ( Hwee-soo Jeong ) 한국보건정보통계학회(구 한국보건통계학회) 2017 보건정보통계학회지 Vol.42 No.4

Objectives: Behaviors of weight control for obesity, which is closely related to all causes death, are affected by the subjective perception of obesity, degree of body mass index (BMI), and the state of multiple chronic diseases. The purpose of this study was to identify factors related to successful weight reduction among subjects who tried to reduce their weight. Methods: This study was conducted using data of the Korea National Health and Nutrition Examination Survey (2015). Among 1,687 subjects who answered “I tried to reduce my weight for 1 years.”, the subjects who answered “I have lost weight” in the question of change in weight were the group of successful weight reduction. We compared gender, demographics, lifestyle, obesity, morbidity, and weight control methods between successful weight reduction group and control group. Results: Two hundreds sixty (15.4%) among total subjects reported successful weight reduction. Young age (odds ratio=1.02, 95% confidence interval=1.00-1.04), aerobic exercise activity (1.36, 1.01- 1.81), subjective perception of obesity (0.68, 0.47-0.97), obesity by BMI (0.62, 0.43-0.89), history of diabetes (2.35, 1.28-4.32) and prescriptive anti-obesity agents (3.44, 1.80-6.57) were associated with successful weight reduction. Conclusions: In order to achieve successful weight reduction, intervention strategies based on this results will be needed.

여고 유도선수의 체급체중 감량이 점증적 최대운동시 심폐기능에 미치는 영향

이태득,장인현 한국체육과학회 2004 한국체육과학회지 Vol.13 No.1

The purpose of this study is to analyze the cardiopulmonary functions and blood lactate of high school female judo athletes who got weight reduction. 18 female judo athletes(weight reduction group; 9, non-weight reduction group; 9)were taken part in this study. Weight reduction was carried out by exercise, dietetic treatment and sauna. Exercise was taken three times a day; In the early morning-4km jogging and support exercise; In the morning-weight training; In the afternoon-30 times of judo Ikigi over 8 rounds and 5 minutes match over 8 rounds. As for dietic treatment, 1000-2000Cal was reduced during the first 5 days and 2000-2400Cal, during the last 5days. And those who needed more reduction took sauna about two times. The cardiopulmonary functions were measured on graded incremental treadmill test. The test was carried out until the subject became all-out, using Bruce Protocol.The results are as follows.After the weight reduction in experimental group, the respiratory exchange rate(RER), breathing frequence(BF), ventilation(VE), blood lactate(LA) were reduced in maximal exercise test, and there was a significant difference at a none weight reduction group. After the weight reduction in experimental group, heart rate(HR), oxygen intake(VO2), and duration time(DT) were reduced in maximal exercise test, but there was not significant difference.From these results we had concluded that after 10 days weight reduction programs effect on RER, BF, VE and LA in female high school judo athletes.

비만 환자에서 행동, 식사, 운동 교육을 통한 체중 조절

박혜순,정영순,신은수,김명화,김철준 大韓家庭醫學會 1993 Korean Journal of Family Medicine Vol.14 No.4-5

Weight Control Attempts in Underweight Korean Adults: Korea National Health and Nutrition Examination Survey, 2007-2010

최오진애,조영규,강재헌,박현아,김경우,허양임,임현지 대한가정의학회 2013 Korean Journal of Family Medicine Vol.34 No.6

Background: Underweight refers to the weight range in which health risk can increase, since the weight is lower than a healthy weight. Negative attitudes towards obesity and socio-cultural preference for thinness could induce even underweight persons to attempt weight control. This study was conducted to investigate factors related to weight control attempts in underweight Korean adults.Methods: This was a cross-sectional study on 690 underweight adults aged 25 to 69 years using data from the Korea National Health and Nutrition Examination Survey, 2007–2010. Body image perception, weight control attempts during the past one year, various health behaviors, history of chronic diseases, and socioeconomic status were surveyed.Results: Underweight women had a higher rate of weight control attempts than underweight men (25.4% vs. 8.1%, P < 0.001). Among underweight men, subjects with the highest physical activity level (odds ratio [OR], 7.75), subjects with physician-diagnosed history of chronic diseases (OR, 7.70), and subjects with non-manual jobs or other jobs (OR, 6.22; 12.39 with reference to manual workers) had a higher likelihood of weight control attempts. Among underweight women, subjects who did not perceive themselves as thin (OR, 4.71), subjects with the highest household income level (OR, 2.61), and unmarried subjects (OR, 2.08) had a higher likelihood of weight control attempts.Conclusion: This study shows that numbers of underweight Korean adults have tried to control weight, especially women. Seeing that there are gender differences in factors related to weight control attempts in underweight adults, gender should be considered in helping underweight adults to maintain a healthy weight.