Spectral Band Replication 대역폭 변화에 따른 오디오 부호화 성능 평가

안경준(An Kyung-Jun),김인철(Kim Rin-Chul) 한국방송·미디어공학회 2010 한국방송공학회 학술발표대회 논문집 Vol.2010 No.7

본 논문에서는 오디오 신호의 부호화에 있어 고대역 신호의 부호화를 담당하는 대역 확장 기법인 SBR 대역폭의 변화에 따른 부호화 성능 변화에 대해 고찰한다. 주부호화기(Core coder)의 주파수 대역에 따라 적절한 SBR의 고대역 적용 범위를 선택하여 음질 평가를 통해 부호화 성능을 평가한다.

수영운동과 식이섭취제한으로 유도되는 체내 글리코겐의 변화가 혈액 및 조직 세포내 IL-6와 관련 신호전달 인자에 미치는 영향

안경준 ( Kyung-Jun An ),허성훈 ( Sung-hoon Hur ),이종삼 ( Jong-Sam Lee ),안나영 ( Na-Young Ahn ) 한국체육대학교 체육과학연구소 2021 스포츠사이언스 Vol.39 No.1

본 연구는 수영운동과 식이섭취제한에 의해 유도되는 근육 조직 내 글리코겐의 변화가 혈액과 근육 조직 세포내 IL-6(interleukin-6)의발현과 긴밀한 연관을 맺고 있는 세포 내 신호전달체계의 변화를 연구하고자 하였다. 실험동물을 통제군(n=12)과 단식군(n=12) 및 운동군(n=12)으로 임의배정하였고, 혈액 및 조직 적출을 위해서 단식군의 경우 오후 4에서 다음날 오전 10시까지 물을 제외한 음식의 공급을 중단해 총 18시간의 단식이 되도록 하였고, 운동군의 경우 오전 8시부터 10시 15분까지 총 2시간의 수영운동(30분 운동 후 5분 휴식)을 실시하였으며, 통제군은 특별한 실험 적용을 하지 않은 상태로 실험이 진행되었다. 첫째, 그룹간 체중의 변화에서는 단식군의 18시간 단식 후의 체중과 비교해 2시간의 수영운동을 하기 전 운동군의 체중과 단식군의 18시간 단식 전의 체중에서 높게 나타났다. 둘째, 혈중 글루코스 농도는 단식군과 비교해 통제군과 운동군이 높게 나타났다. 그리고 혈중 유리지방산의 농도는 통제군에 비해 단식군과 운동군에서 높게 나타났으며, 단식군이 운동군과 비교해 높게 나타났다. 셋째, 조직 내 글리코겐 농도의 변화에서는 soleus와 EDL 모두 단식군과 비교해 통제군과 운동군에서 높게 나타났다. 하지만 조직 내 다른 요인(IL-6, Erk1/2, pErk1/2, p38MAPK)들의 변화는 나타나지 않았다. The aim of this study is to investigate the changes in cellular signaling system associated with the expression of IL-6 (interleukin-6) in blood and muscle tissue cells by the changes in body glycogen induced by swimming exercise and food intake restriction. Randomly assigned to the control group(n=12), the fasting group(n=12), and the exercise group(n=12). In addition, for the extraction of blood and tissues, the fasting group stopped supplying food except water from 4 pm to 10 am the next day for a total of 18 hours of fasting. A total of 2 hours of swimming exercise (5 minutes rest after 30 minutes of exercise) was performed in the exercise group, the control group was experimented with no special experimental application. First, the change in body weight, compared to the weight of the fasting group after 18 hours fasting, the weight of the exercise group before the 2 hours swimming exercise and the weight of the fasting group before the 18 hour fasting were higher. Second, concentration of glucose in blood were higher in the control and exercise groups than in the fasting group. The concentration of free fatty acids in blood was higher in the fasting and exercise groups than in the control group, and the fasting group was higher than the exercise group. Third, changes in tissue glycogen levels were higher the control and exercise groups than the fasting group in the sole and the EDL. However, there was no statistical difference of more than 95% in the changes of other factors in the tissues (IL-6, Erk1/2, pErk1/2, p38MAPK).

Spectral Band Replication 대역폭에 따른 MPEG USAC 부호화 성능 평가

안경준(Kyung Jun An),정유선(Yoosun Jung),백승권(Seungkwon Beack),강경옥(Kyeongok Kang),김인철(Rin Chul Kim) 한국방송·미디어공학회 2011 방송공학회논문지 Vol.16 No.5

장시간 운동 및 단식이 PPARs isoforms 사이의 단백질 발현에 미치는 효과

허성훈(Hur, Sung-Hoon),안경준(An, Kyung-Jun),이종삼(Lee, Jong-Sam) 한국체육과학회 2020 한국체육과학회지 Vol.29 No.6

PURPOSE: The purpose of this study was to investigate the effect of prolonged exercise and fasting on PPAR isoforms(PPARα & PPARγ1) in rat skeletal muscle. METHOD: Thirty-six male rats (Sprague-Dawley) were assigned to one of three subgroups: control (n=12), fasted (n=12), exercise (n=12). Rats treated swimming exercise (2hr; 30 min × 4) and fasting (18hr). We measured PPAR isoforms content(PPARα & PPARγ1), liver glycogen, glucose, FFA concentration. All data are presented as means±SD. Date were analyzed with one-way ANOVA, post hoc analysis was perfo rmed to determine using Tukey’s post hoc test. Singificance was set at P<.05. RESULTS: In fasted rats, liver glycogen concentration significantly decreased compared to control (P<.001) and exercisee (P<.01). Despite the increases in the FFA level both exercise and fasting, there was no significant changes were detected in PPARα & PPARγ1 protein content in soleus muscle (P>.05). CONCLUSIONS: Collectively, these results indicate that PPARα & PPARγ1 protein unaffected by both exercise and fasting and/or elevated in FFA concentration. Further studies are required to determine intert issue communication during combined fasting and exercise.

젖산염의 섭취가 육상 선수의 장시간 달리기 운동수행력에 미치는 영향

허성훈 ( Sung-hoon Hur ),안경준 ( Kyung-Jun An ),김윤미 ( Yoon-mi Kim ),권영우 ( Yeung-woo Kwon ),이종삼 ( Jong-Sam Lee ) 한국체육대학교 체육과학연구소 2021 스포츠사이언스 Vol.39 No.3

본 연구의 목적은 육상 선수를 대상으로 젖산염의 섭취에 따라 혈중 생리적 지표와 운동수행력에 미치는 효과를 규명하여 운동 선수들의 경기력 향상에 기초 자료를 제공함에 있다. 대구 소재 D대학교의 재학중인 중-장거리 육상 선수 총6(남 5, 여 1)명을 선정하였다. 실험 절차는 총 4회(음료를 섭취하지 않은 조건, No drink; 물을 섭취한 경우, Water; 이온 음료, Ion fluid; 젖산염이 함유된 음료, Polylactate)의 실험에 참가하였으며, 운동 강도 적용은 Karvonen et al.,(1957)의 예비심박수 산출 공식을 이용해 예비심박수의 65, 85, 90%에 해당되는 목표 심박수를 적용해 산출하였다. 음료의 섭취는 총 8회(운동 전 -30, -5분, 운동 중 15, 30, 45, 60, 75, 90분)에 걸쳐 이루어졌으며, 혈액 표본 채집 및 생리적 변인의 측정은 총 4회(-40, -5, 90분, All-out) 채집하여 분석한 결과, 첫째, 장시간 달리기 운동 중 음료 섭취에 따른 혈중 생리적 지표(glucose, lactate, pH, HCO₃^-)의 유의한 변화를 나타내지 못했다. 둘째, 장시간 달리기 운동 중 음료 섭취에 따른 운동수행력(time to exhaustion)을 분석한 결과, 장시간 달리기 운동 중 음료 섭취 형태에 따른 운동수행력은 음료를 섭취하지 않은 조건(ND: 12.4±8.7분), 물을 섭취한 경우(Water: 21.8±1.1분), (PS: 28.2±12.5분), 젖산염이 함유된 음료(CM: 36.7±7.6분) 순으로 운동 수행 시간이 향상된 것으로 나타났으나 젖산염이 함유된 음료는 이온 음료와 비교해 유의한 기록의 향상은 나타나지 않았다. This study aims to to find out the effect of polylactate ingestion on physiological indices exercise performance in elite distance runners. Six (5 male and 1 female) elite distance runners (age: 21.3±0.7 years, height: 168.0±7.1 cm, body weight: 55.1±7.8 kg, VO₂max: 66.6±3.3 mL·kg^-1·min^-1) volunteered for this study. In a single blind and random cross over design, subjects participated separated 4 trials; No Drink (ND), Water, PS (ion fluid), CM (polylactate). Blood sample were collected during the four phases of treadmill exercise; rest exercise (-40 min), before exercise (-5 min), after exercise (90 min) and all-out. Runners performed continuous exercise with ingestion of drink (ND, Water, PS, CM) at 65% of THR (target heart rate) for 90 minutes followed by 85% of THR with 5°for 20 minutes (if completed 85% running performance then applied 90% of THR with 5°) until volitional time to exhaustion (TTE). There were no differences between the conditions for any physiological indices. Running TTE increased for CM compared to between ND and Water trials (12.41±5.60 min and 21.82±0.69 min, respectively). However, time to exhaustion did not differ between both conditions (28.22±8.06 and 32.09±9.90 minutes for PS and CM). This study demonstrated that ingestion of polylactate does not sufficiently large to improve extracelluar buffering capacity and endurance exercise performance.

Perilipin 단백질과 근육 내 중성지방의 상호작용이 PPARβ/δ발현에 미치는 효과

허성훈(Hur, Sung-Hoon),안경준(An, Kyung-Jun),이종삼(Lee, Jong-Sam) 한국체육과학회 2021 한국체육과학회지 Vol.30 No.4

PURPOSE: We investigated interaction of perilipin protein and intramuscular triglyceride on expression of PPARβ/δin rat skeletal muscle. METHOD: A total of thirty-six male Sprague-Dawley were used in the study. Rats were divide into three groups: control (n=12), fasted (n=12), aerobic exercise (n=12). Aerobic exercise consist of 2-h (30 min × 4 cycle) swimming exercise and fasting included 18-h with only water. We determined intramuscular triglyceride (IMTG) content, perilipin (PLIN3, PLIN5) and PPARβ/δprotein expression, citrate synthase (CS), β-hydroxyacyl-CoA dehydrogenase (β-HAD) activity. RESULTS: Our analyses indicate that acute aerobic exercise and fasting unaltered IMTG content both soleus and white gastrocnemius muscle. Skeletal muscle PLIN3, PLIN5, PPARβ/δexhibited a less response to experimental conditions. CS and β-HAD activity remained unaffected. CONCLUSIONS: These data indicate that exercise stimulus insufficient to improved lipid metabolic capacity. The metabolic health benefits of exercise training to be fully elucidated in older and clinical populations.

체내 크레아틴 민감성 변화가 크레아틴 구강 섭취 시 건강한 여성의 체지방과 근육량의 변화에 미치는 영향

신보옥(Bou-Ouk Shin),안경준(Kyung-Jun An),이종삼(Jong-Sam Lee) 한국여성체육학회 2021 한국여성체육학회지 Vol.35 No.1

견갑골 안정화 운동이 청소년 야구선수의 견관절 근 기능 및 통증 완화에 미치는 영향

한흥일 ( Heung Il Han ),안경준 ( Kyung Jun An ),류광현 ( Kwang Hyun Ryu ),이종삼 ( Jong Sam Lee ) 대한스포츠의학회 2015 대한스포츠의학회지 Vol.33 No.2

We investigated the effect of scapular stabilization exercise on shoulder joints mobilization and pain release in youth baseball players. Total 15 youth baseball players were voluntarily participated, and randomly divided into one of two experimental groups: either stabilization exercise group (EXE, n=7) or control group (NonE, n=8). Stabilization exercises (i.e., punching, scapular retraction, scapular fold, shrug, pull over, seated press, scaption with retraction, body blade, rotator cuff) were administered to EXE (8 weeks, 3 timesㆍwk-1, 60-100 min.session-1). Muscular power using Biodex system 3, full range of motion (ROM) with a goniometer, and the degree of pain with the Visual Analogue Scale was assessed at both baseline and the time point of completion of 8 weeks training program. Twoway ANOVA (group vs. time) was adopted to observe any interactive effects between factors. The statistical significance level was set at α=.05. There was an improvement in muscular power at both slow (i.e., 60o/sec) and medium (i.e., 180o/sec) speed setting in isokinetic instrument during internal and external rotation on dominant shoulder, and internal rotation only (not with external rotation) on non-dominant shoulder. There was no change in ROM in NonE, but total ROM was significantly expanded in EXE, revealing only degree of internal rotation increased. VAS significantly decreased in EXE. In conclusion, scapular stabilization exercise exerted positive effect on muscular power output, full range of motion and pain release on shoulder joint in youth baseball players. This indicates that scapular stabilization exercise possibly exert meaningful effect in injury prevention and sport performance.

장기간 수중운동 프로그램이 편마비 지체장애 노인의 건강 체력에 미치는 효과

양상봉(Yang, Sang-Bong),안경준(An, Kyung-Jun),허성훈(Hur, Sung-Hoon),김성훈(Kim, Sung-Hoon),원쾅타이(Nguyen, Quang Thai),남인수(Nam, In-Soo),이종삼(Lee, Jong-Sam) 한국사회체육학회 2017 한국사회체육학회지 Vol.0 No.70

The purpose of this study is to investigate the effect of long-term aquatic exercise program on health fitness of the elderly people with hemiplegia disabilities for health promotion by applying the aquatic exercise program to improve the quality of life and prevent falling of thel derly people with hemiplegia disabilities. In this study, six elderly people with hemiplegia disabilities (two maels and four females) living in area C country of G province were selected as study subjects. They were measured (Body composition, Throwing the medicine ball, Grasping power, Isometric endure, Single leg standing, Sitting down and standing up, and Target return) before and after the start of the aquatic exercise program and the following conclusions are obtained. First, long-term aquatic exercise program had no significant differenec in the body composition (p>.05) of the elderly people with hemiplegia disabilities. Second, long-term aquatic exercise program of elderly people with hemiplegia disabilities showed better improvement in medicine ball throwing (p<.01), left grasping power (p<.05), right grasping power (p<.05), one leg stand with eyes closed (p<.05) of health fitness factors. Based on these results, the long-term aquatic exercise program has a positive effect in preventing the daily life of the elderly with hemiplegia disabilities from causing negative changes in body composition. It has been shown an important role in improving the strength and balance ability to improve fall prevention and quality of life. However, the study has not covered changes and difference between male and female. In the future, it is necessary to expand the study based on sexual difference.

규칙적인 수중운동이 노인 골관절염 환자의 평형성, 근활성도 및 건강

임순영(Sun Young Im),김송준(Song June Kim),허성훈(Sung Hoon Hur),안경준(Kyung Jun An),이종삼(Jong Sam Lee) 한국여성체육학회 2014 한국여성체육학회지 Vol.28 No.1

The aim of this study was to examine the effect of regular aquatic exercise on physical fitness, static and dynamic balance capability, muscular activity in elderly women arthritis patients. Subjects (N=22) were allocated one of two experimental groups: arthritis (ART, n=11), control (CON, n=11). All subjects from both experimental groups were participated in an exercise program that was designed for same exercise intensity and work volume, and exercise was performed three times a week (60 min-session-1) for 12weeks. %body fat and body mass index (BMI) was significantly decreased while lean body mass and muscle mass was significantly increased in both experimental groups. Overall physical fitness level was improved in both groups but revealing different patterns between groups. In addition, static and dynamic balance capability was also significantly improved in both experimental groups. In conclusion, the aquatic exercise applied to the elderly women was effective for improving not only their overall health status but also their static and dynamic balance capacity.