생리주기에 따른 일회성운동이 순환기능과 혈중젖산에 미치는 영향

권영우(Kwon, Yeung-Woo),류호상(Yoo, Ho-Sang),김진형(Kim, Jin-Heung) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.3

We examined the pattern of circulatory factors and blood lactate concentration in the early follicular, late follicular, and middle luteal phases of the menstrual cycle in fourteen eumenorrheic women following 30 min of submaximal exercise at 70-75% maximal heart rate. Supine hemodynamic measurements and lactate were assessed at rest and then immediately after exercise. Resting systolic blood pressures increased to significantly higher levels in the early follicular than in the late follicular phase and middle luteal phase(p 〈.05). Resting heart rate and blood lactate did not differ between menstrual phases. Post-exercise blood pressure, heart rate and blood lactate did not differ across menstrual phases. In conclusion mense tend to increase resting blood pressure partially, but this mense related increase disappeared with exercise. Further study needed to elucidate the exact mechanism related to the degree of menstrual syndrome and mense.

레슬링선수의 장단기체중감량이 염증인자 및 근육손상인자에 미치는 영향

권영우(Kwon, Yeung-Woo) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.5

The purpose of this study was to investigate the effects of rapid and gradual weight loss on inflammatory factors(TNF-α, IL-6, CRP) and muscle damage factor(CK). Twenty four male wrestlers participated in this study and were divided to rapid(n=12, RW) and gradual weight loss group(n=12, GW). All subjects reduced approximately 6% of their body weight. In the RW, weight loss was achieved in 7day by fluid and energy restriction and forced sweating, In the GW, weight loss was lost in 21day by energy restriction and exercise. Blood sampling were performed before and following match and were extracted to analyze all variables from rest, immediately after exercise, 24hour recovery period. IL-6 levels significantly increased in both weight loss groups immediately after exercise and recovery period but there was no significant difference between the two groups. CRP was increased immediately after exercise and recovery period only in rapid weight loss group and also was significantly greater than other group and treatment. CK levels significantly increased in both weight loss groups immediately after exercise and recovery period from all treatment. Rapid weight loss resulted increased CK values compared with other treatment. In conclusion, rapid weight loss exaggerated inflammatory response and muscle damage in comparison with gradual weight loss. Further study needed to elucidate the exact mechanism related to plasma volume change, reactive oxidative response with rapid and gradual weight loss.

체급경기선수의 급속체중감량이 혈관조절인자 (ET-1, PGI₂)와 지질과산화에 미치는 영향

권영우(Kwon, Yeung-Woo) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.3

The purpose of this study was to investigate the effects of rapid weight loss on vascular regulatory factors(ET-1, PGI₂) and MDA, Twenty four male wrestlers participated in this study and were divided to weight loss group(n=12) and control groups(m=12). All subjects reduced approximately 6% of their body weight. Weight loss was achieved in 7day by fluid and energy restriction and forced sweating. Blood sampling were performed before and following weight loss and were extracted to analyze all variables from rest, immediately after exercise, 30minutes recovery period. PGI₂ levels significantly increased in both groups immediately after exercise and recovery period but there was no significant difference between the tow groups. MDA levels significantly increased in both groups immediately after exercise and recovery period and this exercise induced increase was higher in weight loss group than in control group. In conclusion, acute exercise enhanced vasodilation and lipid peroxidation. Rapid weight loss exaggerated lipid peroxidaton. Further study needed to elucidate the exact mechanism related to different weight loss period and amount.

트레드밀을 이용한 내리막 역방향 달리기가 CRP, TG, 순환기능에 미치는 영향

권영우(Kwon, Yeung-Woo),김진형(Kim, Jin-Heung) 한국체육과학회 2017 한국체육과학회지 Vol.26 No.4

The aim of the study was to investigate the effects of a single bout of concentric and eccentric exercise inducing no or just mild muscle damage on blood CRP, TG, circulatory factors(blood pressure, heart rate). 8 healthy and active male participants took part in a randomized cross over trial consisting of concentric(uphill), eccentric(downhill) exercise on a treadmill during 30minutes. Exercise intensity was matched at 60% of HRmax. Concentric exercise ran in a forward direction and eccentric exercise ran reversed direction at 16% slope. Venous blood samples were drawn before, directly after and 3 hours after exercise for blood CRP, and TG concentration. Blood pressure was measured in immediately exercise, 5, 10, 15, 20minutes after immediately exercise. Heart rate was measured in immediately exercise, 1, 2, 3minutes after immediately exercise. CRP and CK concentration did not show any significant difference between exercise and treatment. Systolic and diastolic blood pressure compared to rest, decreased significantly immediately exercise and recovery period but no difference in the pattern of change was measured between concentric and eccentric exercise treatment. In heart rate, no difference in the pattern of change was measured between concentric and eccentric exercise treatment.

생리주기와 일일주기에 따른 일회성운동이 순환기능(혈압, 심박수)과 혈중젖산에 미치는 영향

권영우(Kwon, Yeung-Woo),박종원(Park, Jong-Won) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.4

The purpose of this study was to investigate the effects of circadian rhythm and menstrual cycle on blood pressure, heart rate and lactate. Twenty women participated in this study and were measured blood pressure, heart rate and lactate during before and immediately after acute exercise. Those parameters were measured at daily time(07:00hour, 21:00hour) and menstrual cycle(luteal phase, follicular phase) respectively. Exercise sessions took place on a treadmill performing 4 minutes of running to reach targeted intensity (75%HRmax) and continued during 30 minutes. Systolic and diastolic blood pressure in more higher 07:00hour than 21:00hour. Acute exercise increased systolic and diastolic blood pressure and this exercise induced increase of systolic blood pressure is more higher at luteal phase of 07:00hour than luteal phase of 21:00hour. Heart rate did not show any significant change with circadian rhythm and menstrual cycle. Blood lactate concentration increase immediately after acute exercise and this increase is more higher at follicular phase than luteal phase both at 07:00 and 21:00hour. Also the resting lactate concentration was lower at 21:00hour than 07:00hour both follicular and luteal phase. In conclusion, morning exercise increase blood pressure and this increase is more intensified at luteal phase than follicular phase immediately after exercise.

동일한 운동량의 일회성운동 시 운동강도 차이가 비만 지적 장애인의 염증인자 및 CK에 미치는 영향

권영우(Kwon, Yeung-Woo),고성경(Ko, Seong-Kyeong) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.2

The purpose of this study was to investigate the effect of different intensity with acute isocaloric exercise on blood inflammatory factors(TNF-a, IL-6, CRP) and CK. the The mentally retarded population(25.2±4.47 yrs, n=12) took part in this study. They performed treadmill exercise with two different intensity(60%HRR vs. 80%HRR), however each total amount of exercise was same as 300kcal/hr. Venous blood samples were taken from an antecubital vein by venepuncture; pre-exercise, immediate post-exercise and recovery period(24hours later). At immediate post-exercise, the blood TNF-a, IL-6 and CRP concentration were significantly increased in both treatment and continuously higher than baseline during 24hr recovery period. Blood CK concentration increased significantly after immediate exercise and such increase continued during recovery period in both treatment, however there was no difference between two exercise type. Significant correlation found between inflammatory factors and CK concentration at recovery period after 80%HRmax. In conclusion, acute exercise affected to increase the inflammatory indices and CK. Although the different intensity did not induce any significant change in all parameters, inflammatory indices and muscular damage might aggravate at recovery period after higher intensity exercise.

레슬링선수의 체중감량이 운동수행의 주기리듬에 미치는 영향

권영우(Kwon, Yeung-Woo),류호상(Yoo, Ho-Sang),김진형(Kim, Jin-Heung) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.4

The purpose of this study was to investigate the effects of weight loss on exercise related circadian rhythm and exercise performance in wrestlers. Fifteen subjects participated in this study and measured leg strength(Cybex test), anaerobic power(Wingate test), VO₂max(Bruce protocol) at 07:00hours and 17:00hours during before and after weight loss. All subjects reduced approximately 6% of their body weight during 15days by fluid and energy restriction and forced sweating. Anaerobic power(average power) and strength(extension peak torque) presented higher levels of 17:00hours than 07:00hours but after weight loss this daily exercise rhythm abolished. Weight loss reduced maximal aerobic running time and muscle endurance capacity. In conclusion weight loss was partially disordered exercise related circadian rhythm and reduced exercise performance. Abolished circadian rhythm was not directly related by reduced exercise performance after weight loss. Further study needed to elucidate the exact mechanism related to different weight loss period and amount.

지적장애인의 성별에 따른 혈액의 구성성분과 hematocrit의 차이

권영우(Kwon, Yeung-Woo),류호상(Yoo, Ho-Sang) 한국체육과학회 2017 한국체육과학회지 Vol.26 No.5

The purpose of this study was to investigate the difference of formed elements(RBC, Hb, WBC, WBC subsets) and hematocrit of blood according to the gender of the intellectual disabilities. Fourteen mentally retarded males(n=7) and females(n=7) participated in this study. All subjects were classified as a light and moderate mental retardation(mean IQ 48.0±3.63). All subjects performed low intensity submaximal exercise(75%HRmax) by treadmill during 30minutes. Blood sample was obtained at rest, immediately after exercise and 60minute later after immediately exercise. No significant interaction effects(group×time of measurement) were observed for RBC, Hb, HCT. Between-group analysis of each group reveals that RBC, Hb, HCT value of the male were significantly higher than the female at all measurement point. No group×time interaction for WBC was determined. Between-group analysis of each group reveals that WBC was significantly increased after immediately exercise and returned baseline level after 60minutes recovery period. The group×time interaction effect for neutrophil and lymphocyte did not reach significance but there was a trend toward a difference.

무용전공자와 비전공자의 체구성성분의 차이

권영우(Kwon, Yeung-Woo) 한국체육과학회 2017 한국체육과학회지 Vol.26 No.6

The purpose of this study is to compare body composition, excessive high body composition individuals, and low body composition individuals between female dancers and non-dancers with collegiate. The measurement items of body composition are body weight, percent body fat, WHR, LBM, and lean body mass including skeletal muscle mass and water content. Excessively high and low body composition individuals of each item mentioned was judged by Inbody, a body composition analyzer. Body weight, body fat percent, WHR, BMI, and body water contend showed no significance between groups. In the case of skeletal muscle, the value of dance group was significantly higher than that of general students. In comparison of the individuals who shows obesity status between dancers and non-dancers, there was no difference in overweight, overfat, and overBMI. However, in the case of overweight and overWHR, dance group showed lower tendency than non-dance group. In comparison of excessively low body composition individuals, there was not much difference between the lower WHR, and low BMI, but in the case of low body weight and low fatness, the dance group tended to be higher than the non-dance group. In the comparison of excessively high lean body mass, there was no difference between the groups in both over skeletal muscle and over body water. However, in the case of excessively low lean body mass, both the low skeletal muscle and low body water content were higher in the two groups, especially the ratio of non-dance major.

비만여성의 운동형태가 신체구성과 염증지표에 미치는 영향

권영우(Kwon Yeung-Woo),고성경(Ko Seong-Kyeong) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.3

This study was aimed to examine the effects of a different exercise program on body composition and inflammatory markers in obese women. Forty young obese women with over 30% body fat were classified into four groups; aerobic G.(AG, n=10), resistance G.(RG, n=10), combined G.(CG, n=10) and control G.(n=10). Exercise program was performed for 50min with four times per week. Aerobic program with jogging and cycling was performed at 70%HRR. Resistance program with nine type modes was performed with 3set at 10RM. The combined program was composed with aerobic(jogging at 70%HRR for 20min) and resistance exercise(3set at 10RM for 30min with five type exercises). Body weight and fat, lean body mass were significantly changed from baseline in exercise groups. Especially, after 12 weeks body fat of AG, body weight and fat of RG were significantly decreased from baseline, and lean body weight of RG and CG were significantly increased from baseline in same groups. IL-6 and CRP were significantly decreased from baseline in exercise group. Especially after 12 weeks IL-6 of AG and CG, and hsCRP of AG, RG, CG were significantly decreased from baseline in same groups. In conclusion, the exercise program for obese young women seemed to be beneficial for improving of body composition and inflammatory markers.