점증부하 에르고미터 운동 중 심박수역치(heart rate threshold)를 이용한 무산소성역치(HR<SUB>LT</SUB>, HR<SUB>VT</SUB>) 추정식 개발

남상석(Nam, Sang-Seok),함주호(Ham, Joo-Ho),박훈영(Park, Hun-Young),배상곤(Bae, Sang-Kon),고병훈(Ko, Byung-Hoon),김연호(Kim, Youn-Ho),선우섭(Sunoo, Sub) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.5

In this study, we conducted graded maximum exercise test to normal people(male 112, female 108) using cycle ergometer. We calculated heart rate which corresponds heart rate threshold(HRT) and lactate threshold(LT), ventilation threshold(VT) through the test. After that, we divided data(n=220) randomly using Bernoulli"s trials. 70%(actually 70.5%) of data were used as analysis data(male 79, female 73) and 30%(actually 67.6%) were used as validity test data(male 33, female 35). Using analysis data, we conducted simple regression analysis. Independent variable was HRT and dependent variable was HRLT, HRVT which represents heart rate corresponds anaerobic threshold. The adjusted R<SUP>2</SUP> was mean 72.3% and SEE was mean 8.96 bpm. Moreover, in validity test, SEE was 8.54bpm which was similar to developed regression model. So we identified developed regression model is valid. These results show that HRT is meaningful variable to predict HRLT, HRVT and very important variable to estimate anaerobic threshold.

다양한 저압·저산소 환경에서 최대 하 운동 시 골격근 산소화수준 및 적혈구변형능력 변화

남상석(Nam, Sang-Seok),선우섭(Sunoo, Sub) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.5

The aim of present study was to investigate acute decrease reasons of submaximal aerobic performance at the whole and local body level. For the present study, 14 health male was chosen out of 20 volunteers. Subjects performed exercises that consist of 30min bicycle exercise at a 75%HRmax on simulated altitude of sea level, 2,000m, 3,000m, 4,000m and 5,000m. Each exercise was performed at intervals of three days to eliminate repetition effect. During the exercises, whole and local body level parameters were measured at rest, 4min, 8min, 20min, 30min. Whole body level parameters were aerobic performance(watt) at 75%HRmax, %SpO₂, blood lactate concentration and local parameters were oxygenation in skeletal muscle, RBC deformability. As a result, aerobic performance(watt) at 75%HRmax was decreased acutely on higher altitude than 4,000m as compared with lower altitude than 3,000m. This decrease was caused by increase of blood lactate concentration and decrease of O₂Hb. Because PO₂ was decline, oxygen transportation capacity was decrease. These factors lead to increase of blood lactate concentration and decrease of O₂Hb. In addition, elongation index(EI) of RBC at 5,000m were lower than sea level or 2,000m.

구기 및 투기선수들의 다리신전 Power 특성

선우섭(Sunoo sub),손두옥(Son du-ok),김형돈(Kim hyung-don),황경식(Hwang kyung-sheek),최조연(Choi jo-yeon) 한국체육과학회 2000 한국체육과학회지 Vol.9 No.2

The purpose of this study was to offer the basic data for the effective power training program. And the ball game athletes and the martial art athletes - they had a different exercise pattern - were chosen in the study as subjects. After we measured the power of physique and various leg extension power movement, we examined the power characteristics of each sports and group. The results of study were as follows. 1. Among the physique factors except the rate of body fat and the calf length, the ball game group was significantly superior to the martial art group. Particularly thigh girth of any other group's, the calf girth of rugby and handball was so. 2. For the reaction time of the whole body largely controlled by the function of nervous system, that of handball athletes was faster than that of any other ball game group's and that of taekwondo athletes was faster than that of any other martial art group's. But there was no significantly difference between the ball game group and the martial art group. 3. In terms of the sargent jump and the standing board jump, that of the ball game group's as significantly higher than that of the martial art group's. And volleyball athletes were outstanding among the ball game group, judo athletes were so among the martial art group. 4. For maximum anaerobic power(㎏m/L.B.M./sec), that of martial art group's was significantly high. 5. Total leg extension power(L.E.P.) at the load body weight, 120% body weight, and 80% body weight appeared high in order of judo, rugby, volleyball, handball, taekwondo, boxing and it appeared significantly low in martial art group. But there was little difference between group, when we made a comparison with total L.E.P./L.B.M. When we divided total L.E.P. into force, speed factor and then compared, the force factor of the ball game group's was significantly higher than that of the martial art group's in all load conditions. In addition to, the speed factor of the ball game group's was significantly higher than that of the martial art group's in the load of 80% body weight. 6. Leg extension speed(L.E.S.) of the ball game group's was significantly faster than that of the martial art group's in all load conditions. As our results above, the ball game group had the good speed factor among the power composition factor. So the ball game group needs muscle-strength-training by high-load-weight training, the martial art group needs complex forcing training of force and speed factor.

6주간의 평압 · 저산소 트레이닝이 비만여성의 신체성분, 혈중지질, 에너지대사 호르몬 및 운동부하량에 미치는 영향

선우섭(Sunoo, Sub),남상석(Nam, Sang-Seok) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.4

This study was designed to investigate the effect of aerobic training in normobaric hypoxia. 21 obese and middle aged women(above 30% body fat) were volunteered to participate in the study subjects and were divided into two groups such as normobaric normoxia and 2,000m normobaric hypoxia. Training consisted of bike ergometer(30min) and treadmill exercise(30min) in 75%HRmax that developed Miyashita on 1985. Exercise frequency and duration was 1 hour a day, 5days a week, 6 weeks. Body composition, blood lipid and metabolic related hormone were measured pre and post. The results of the present study were as followed: 1. Muscle mass was significantly decreased in both group. 2. In the blood lipid, HDL in both group was significantly increased. TC and LDL was detected a tendency to decrease in normobaric hypoxic group while a tendency to increase was detected in control group. 3. In metabolism-related hormone, norepinephrine was significantly increased and T₄ was significantly decreased in both group but cortisol was significantly decreased in normobaric hypoxic group. TG and GH was detected a tendency to increase in normobaric hypoxic group while a tendency to decrease was detected in control group.

3,000m 상당고도에서의 간헐적인 저압ㆍ저산소 수면노출이 핀수영 선수의 혈중산소운반능력과 최대산소섭취량에 미치는 영향

선우섭(Sunoo Sub),남상석(Nam Sang-Seok),황경식(Hwang Kyung-Seek),박훈영(Park Hun-Young) 한국체육과학회 2008 한국체육과학회지 Vol.17 No.4

The purpose of this study was to examine the effects of hypobaric hypoxic exposure on maximal oxygen uptake and oxygen transport system in national fin-swimmers. The 17 swimmers, regardless of sex, were divided into the experimental group(n=8) and the control group(n=9). After taking passive acclimation training that was working out at the sea level, sleeping at 3,000m for 8 hours a day, 3 days a week, four weeks to the experimental group, Oxygen uptake, oxygen transporting capacity in blood, and effects on time records, by treadmill graded submaximal and maximal exercise were surveyed as followes; No significant difference on body composition, heart rate, maximal oxygen uptake, blood lactate concentration during exercise and, RBC, Hb, EPO and 2,3-DPG was shown due to training types and time. Time records during passive exposure acclimation contained 3 new records and 1 national records of swimmers of the experimental group. Accordingly, passive acclimation training under various hypobaric hypoxic condition in elite sports players is needed.

다양한 저산소 환경에서 80%HRmax의 상대강도 자전거 운동 시 혈중 젖산농도 및 혈액가스 반응

선우섭(Sunoo, Sub),남상석(Nam, Sang-Seok) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.4

The purpose of this study was investigate that response of blood lactate concentration and blood gas during 80%HRmax cycle exercise and account for exercise performance decrease through acid-base balance. Ten healthy men participated in the study. The subject performed 30min cycle exercise at sea level, 2,000 m normobaric hypoxic environment, and 4,000 m normobaric hypoxic environment. Blood lactate concentration, PO₂. PCO₂, pH, HCO₃-, and ScO₂ during cycle exercise were measured. The collected data were processed statistically by repeated one-way ANOVA and LSD. As a results, cycle load for maintain 80%HRmax at 12.8% O₂ significantly decreased compared to 16.5% O₂ and 20.9% O₂. Blood lactate concentration at 12.8% O₂ was significant increase compared to 20.9% O₂ and presented increase tendency compared to 16.5% O₂. Meanwhile, pH at 12.8% O₂ presented constant or increase tendency compared to 20.9% O₂, despite blood lactate concentration at 12.8% O₂ was significant increase compared to 20.9% O₂. At 12.8% O₂, PO₂ and PCO₂ was significant decrease compared to all other simulated environments. HCO₃- presented most decrease tendency compared to all other simulated environments. Overall, blood lactate concentration at 12.8% O₂ was highest because carbohydrate dependence increase as the oxygen partial pressure is decrease. Also, despite blood lactate concentration was significant increase, pH maintained. These results that PCO₂ is removed through pulmonary ventilation increase caused by hypoxic ventilation response.

저압,저산소 노출이 대학농구선수의 심폐기능 및 혈중 산소운반능력에 미치는 영향

선우섭 ( Sub Sunoo ),김현국 ( Hyun Kook Kim ),황경식 ( Kyung Sheek Hwang ) 한국운동영양학회 2005 Physical Activity and Nutrition (Phys Act Nutr) Vol.9 No.1

The purpose of this study was to propose types of hypobaric hypoxic training for cardiopulmonary function and oxygen transporting capacity. Eighteen university basketball players were divided into H.L group (Living High & Training Low, n = 9) and L.L group (Living Low & Training Low, n = 9) according to hypoxic exposure. Oxygen transporting capacity, body composition, maximal oxygen uptake, blood lactate concentration, cardiopulmonary function and heart rate were investigated. Results were as follows. 1. There was no significant difference on body composition inter group or among several test time. 2. After exposure, heart rate was significantly low in H.L group. And there was significant difference inter group or among several test time. 3. Maximal oxygen uptake was significantly high by exercise time increase but there was no significant difference inter group or among several test time. 4. Blood lactate concentration was increased after exposure but there was no significant difference inter group or among several test time. 5. According to training period increase, there was no significant difference on RBC, EPO but Hct, Hb concentration were significantly lower than after Iweek exposure. But there was no significant difference inter group or among several test time. 6. In hypobaric hypoxic environment, heart rate during sleeping was significantly decrease as time goes by. 7. In hypobaric hypoxic environment, oxygen saturation during sleeping was significantly increase as time goes by. As a result, passive exposure in hypobaric hypoxic environment was not significantly efficient on body composition, blood component and blood lactate concentration but heart rate during exercising and sleeping was significantly low and exercise time and maximal oxygen uptake increased. It could be a possibility.

Disciplinary Sport Physiology - : The Effects of Detraining on Muscle Strength

김형돈,선우섭 ( Hyung Don Kim,Sub Sunoo ) 한국체육학회 1995 국제스포츠과학 학술대회 Vol.1995 No.-

태권도 시범자와 경기자의 등속성 근력에 관한 연구

김영우(Kim Young-Woo),선우섭(Sunoo Sub),윤우상(Yoon Woo-Sang),최조연(Choi Jo-Yeon) 한국체육과학회 2001 한국체육과학회지 Vol.10 No.1

The purpose of this study is compare the maximal isokinetic strength at 60ㆍ180ㆍ240deg/sec of knee extension and flexion, as well as ipsilateral ratio and bilateral ratio at 60deg/sec between demonstrator and athletes in collegiate taekwondo players. There was no significant difference in maximal isokinetic strength at 60ㆍ180ㆍ240deg/sec of knee extension and flexion. Due to the possible injury, the same side strength ratio (ipsilateral strength balance) and both side strength ratio (bilateral strength balance) at 60deg/sec condition was not performed.

2주간 서로 다른 저산소 환경에서의 간헐적인 트레이닝이 에너지대사와 골격근 산소화 농도에 미치는 영향

박훈영(Park, Hun-Young),선우섭(Sunoo, Sub),남상석(Nam, Sang-Seok) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.3

This study was designed to examine the effect of 2weeks living low training high (LLTH) under 2,000 m and 3,000 m simulated hypoxic environments on exercise load, oxygen delivering capacity of the blood, energy metabolism, and skeletal muscle oxygenations. Twenty eight male college students participated in the study as subjects and divided into three groups such as control group (n=8), 2,000 m LLTH group (n=10) and 3,000 m LLTH group (n=10). They performed cycle exercise (30 min) and treadmill exercise (30 min) within 80%HRmax developed Miyashita on 1985. Exercise frequency was 1hour, 3days a week, 2weeks. At rest and during exercise, exercise load, Hb concentration, Hct, %SPO₂, VO₂, blood lactate level, △O₂Hb, △HHb, and TOI were measured before and after training (Pre and Post). As a result, 2weeks LLTH under 2,000 m and 3,000 m simulated hypoxic environments does not induced improvement on oxygen delivering capacity of the blood through Hb concentration and Hct. However, energy metabolism and skeletal muscle oxygenation have been improved by LLTH. These changes improve oxygen supply to muscle tissue, oxidative phosphorylation process in mitochondria, lactate tolerance of the blood, and exercise performance. Also, these physiological changes presented a similar pattern in the 2,000 m and 3,000 m LLTH groups. In later research, various studies need to the effect of LLTH under simulated hypoxic environments on various physiological variables and exercise performance.