남자 대학운동선수의 신체조성과 유산소성 능력 및 무산소성 파워의 관계

진정권(Jin, Jung-Kwon),공성아(Kong, Sung-A),임승길(Lim, Seung-Kil) 한국체육과학회 2021 한국체육과학회지 Vol.30 No.2

The purpose of this study was to investigate the relationship between body composition, aerobic ability, and anaerobic power in male college athletes. The subjects of this study were 113 male college athletes. Body composition was measured using bioimpedance analysis device. The aerobic capacity was measured the VO₂max(ml/kg/min) and VO₂ anaerobic threshold (AT, %) by the graded exercise test using a treadmill. Anaerobic power was measured using sargent jump. For data analysis, Pearson"s correlation analysis, simple and multiple linear regression analysis were performed to confirm the relationship and influence of body composition, aerobic ability, and anaerobic power. The significance level was set to α=.05. As a result of the correlation analysis, weight, body mass index(BMI), % body fat, body fat mass(kg), and lean body mass(kg) have a negative correlation with the VO₂max (r= -0.45~-0.65). The lean body mass(%) has a positive correlation with the VO₂max(r=0.53). There is a positive correlation(r=0.23, 0.25) between body weight and fat-free mass. Body weight, BMI, % body fat, body fat mass(kg), and lean body mass(kg) have a negative correlation with anaerobic power(r= -0.24~-0.58), and lean body mass has a positive correlation with anaerobic power(r=0.54). As a result of simple regression analysis, the increase of body weight, BMI, % body fat, body fat mass(kg), and lean mass(kg) was associated with a decrease in VO₂max. Increased of body weight and lean mass(kg) are associated with a decrease in VO₂AT. As a result of simple regression analysis, an increase of body weight, BMI, % body fat, body fat(kg), and lean body mass(kg) was associated with a decrease in VO₂AT. The increase of lean body mass(%) is associated with an increase in anaerobic power. As a result of multiple regression analysis, the explanatory power for the VO₂max of % body fat was 42.8%, and the explanatory power for the anaerobic power of body weight and lean mass was 34.8%. The explanatory power for the AT of lean mass(kg) was relatively low at 5%. The body composition of college athletes is related to aerobic ability and anaerobic power. College athletes are encouraged to manage their body composition to improve their performance, and rather than increase the muscle mass of the whole body, they should selectively develop muscles that are directly related to performance improvement and damage prevention in terms of functionality.

중년 남성 소방공무원의 규준지향 체력평가기준치

진정권(Jin, Jung-Kwon),임승길(Lim, Seung-Kil) 한국사회체육학회 2015 한국사회체육학회지 Vol.0 No.62

The purpose of this study was to establish a norm-referenced standard for physical fitness in middle-aged firefighters. A total of 719 male and currently active firefighters of ages 45-49 years participated in this study. As components of physical fitness, we measured flexibility, power, agility, upper and lower body strengths, muscular endurance, and cardiorespiratory fitness. The following physical tests were performed to measure each fitness parameter: flexibility was measured using the sit-and-reach test; power was measured using the sargent jump test; agility, using the side step test; upper body strength, using the grip strength test; lower body strength, using the isokinetic dynamometer at 60°/s to measure isokinetic knee extension and flexion torques; muscular endurance, using sit-up and push-up tests; and cardiorespiratory fitness, using the graded exercise test on a treadmill to measure the maximal oxygen consumption. For data analysis, we applied our norm-referenced physical fitness scores from all study subjects into percentile ranking and the results were classified into 5 phased grades. We found that the mean sit-and-reach score was 11.22 cm, the mean sargent jump score was 36.53 cm, the mean side step score was 34.83 time/20s, the mean left and right hand grip strengths were 47.58 kg and 50.09 kg, respectively, the mean left and right knee extensor strengths were 236.06% and 237.46%, respectively, the mean left and right knee flexor strengths were 109.30% and 111.12%, respectively, the mean sit-up score was 31.69 repeats/min, the mean push-up score was 28.48 repeats, and lastly, the mean volume of maximal oxygen uptake was 42.11 ml/kg/min. We believe that our norm-referenced standard for physical fitness in middle-aged firefighters may be used to enhance job performance of firefighters by setting a standardized benchmark for job-specific fitness. When we compared our results of a middle-aged male firefighter to those of general public male with the same age range, we found that the levels of flexibility, power, lower body strength and cardiorespiratory fitness of many firefighters were lower than those of general male. That parameters are especially important and relevant parameters for firefighters. So we need to a new policy and other methods to improve the physical fitness and job performance of middle-aged firefighters.

중학교 레슬링선수의 운동경기가 혈청효소와 타액 IgA, 코티졸에 미치는 영향

진정권(Jin, Jung-Kwon),이대택(Lee, Dae-Taek),이명천(Lee, Myung-Chun) 대한운동학회 2007 아시아 운동학 학술지 Vol.9 No.1

이 연구는 중학교 레슬링 선수들의 30분 운동(경기전 운동과 4분간 경기 포함)이 근육손상 관련 혈청 효소와 타액 IgA(Saliva IgA), 타액 코티졸에 미치는 영향을 알아보기 위해 이루어졌다. 본 연구를 위해 Y시에 소재한 7명의 중학교 남자 선수(13.7±0.8세)가 본 연구에 참여하였으며 선수들의 운동경력은 6개월에서 30개월이었다. 연구를 위해 전완정맥에서 7㎖ 혈액과 타액에서 2㎖를 운동전, 운동직후, 회복기 30분에 수집하여 분석하였다. 혈청 크레아틴키나아제(CK)는 운동전에 비해 운동직후에 유의하게 증가하였으며 회복기 30분에는 유의하게 감소되어 안정시 수준으로 회복되었다. 젖산탈수소효소(LDH)는 시기별 유의한 차이는 없었으며 아스파테이트전이효소(AST)는 회복기 30분에 유의하게 감소하였다. 타액 IgA는 운동직후에 유의하게 증가하였으며 회복기에는 유의한 차이는 없었다. 코티졸은 운동직후에 증가하였다가 회복기에 감소하는 경향을 보였으나 유의한 차이는 없었다. 연구결과에 의하면, 레슬링 선수들의 30분 운동은 근육손상 관련 효소와 면역계에 유의한 차이를 나타내었다. The purpose of this study was to observe the effects of wrestling training and competition on serum CK(creatine kinase), LDH(lactate dehydrogenase), AST(aspartate aminotransferase) activity, saliva IgA, and Cortisol in Middle School Wrestlers. Subjects of this study were 7 young males(13.7±0.7 years old; wrestling career 6 to 30 months) who had participated in regular exercise(3hours a day, 5 times a week). To study the change of these variables, 7ml of blood samples and 2㎖ of saliva sample were taken from the antecubital vein and mouth at rest, right after wrestling competition, and 30min after competition. There was significant difference in measuring period for CK, AST, and S-IgA(p<.05). However, there was no significant difference in measuring period for LDH and Cortisol. These findings suggest that wrestling training and competition results in a significant difference in muscle damage enzyme and immune system.

게임형 댄스 운동이 에너지소비량과 성장호르몬, 세로토닌에 미치는 영향

진정권(Jin, Jung-Kwon),선상규(Sun, Sang-Kyu),전종목(Chun, Jong-Mok) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.2

The purpose of this study was to evaluate energy expenditure of active video dancing game and to determine the effects of dancing game on growth hormone and serotonin. 10 men(mean age=32.6±2.0) and 10 women(mean age=32.3±2.1) completed three aerobic exercise session in which they performed active video dancing game(6min), walking(6km/h, 6min), and Jogging(8km/h, 6min). There was 30-min rest intervals between dancing game and walking, and 10-min rest intervals between walking and Jogging. Energy expenditure data was collected by the Cosmed K4b2, which was averaged over a 20-s period. Blood hormones were sampled and analyzed before and after exercise. The results were analyzed statistically using repeated one-way ANOVA, and Tukey HSD test was used in the event of a significant F-ratio(p<.05). The energy expenditure of active video dancing game was significantly increased by 467% compare to rest(p<.05). It was similar to that of 6km walking. The plasma concentration of growth hormone was increased about 77% after dancing game, but no significant difference was observed between before and after. The plasma concentration of serotonin was significantly increased about 27% after dancing video game(p<.05). These findings indicate that active video dancing game may be an effective aerobic exercise for those who have no time doing work out in facilities and like to do physical activity like dance.

운동과 젖산 순환

진정권(Jin, Jung-Kwon),이대택(Lee, Dae-Taek),이명천(Lee, Myung-Chun) 대한운동학회 2006 아시아 운동학 학술지 Vol.8 No.2

본 연구는 골격근에서 젖산의 생성과 산화에 대해 알아보고자 조사되었다. 역사적으로 살펴보면, 골격근은 운동중 젖산 생성의 장소이며 산소의 부족과 피로와 관련된다고 제시되었다. 최근에 와서, 골격근은 젖산 생성 뿐 아니라 젖산 제거에 중요한 역할을 한다고 인식되었다. 젖산 교환은 막운반단백질(monocarboxylate transporter, MCT)에 의해 중재됨이 보고되었다. 젖산탈수소 효소(LDH)는 젖산 형성과 근세포에서 젖산의 전환을 조절하며 5가지의 LDH 동위형태가 있다. 지구력 훈련은 젖산 제거를 증가시키고 젖산 생성을 감소시켜 근육 내 젖산 함량을 감소시킨다. This paper examines the process of lactate production and uptake in skeletal muscle. Muscle has been viewed primarily as a producer of lactate which related to oxygen deficit and fatigue, but is now considered to be a major site of lactate uptake. Skeletal muscle has a large capacity for lactate oxidation and it is enhanced by exercise. Lactate exchanges are facilitated by membrane-bound MCT. Lactate dehydrogenase (LDH) controls the formation of lactate and may regulate the turnover of lactate in the muscle cell. Skeletal muscle contains five LDH isoforms (LDH 1-5). Endurance training decreases muscle lactate concentrations by increasing lactate clearance and by decreasing lactate production.

암 예방을 위한 신체활동에 대한 고찰

진정권(Jin Jung-Kwon),최필병(Choi Pil-Byung),김병조(Kim Byung-Jo),이명천(Lee Myung-Chun) 한국코칭능력개발원 2008 코칭능력개발지 Vol.10 No.1

BMI 수치가 성인남성의 혈압 및 체력수준에 미치는 영향

전종목(Chun, Jong-Mok),진정권(Jin, Jung-Kwon),이재문(Lee, Jae-Moon) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.3

The purpose of this study was to evaluate the results of analysis of covariance (ANCOVA) with ages that can be controlled through this study, taking into account the fact that adult males can bring a direct impact on the body mass index (BMI) level and blood pressure, and physical fitness. The subjects of this study was 243 adult males, who has no case past history, and BMI groups were divided in three groups (normal, 18.5~22.9 kg/㎡; over weight, 23~24.9 kg/㎡; and obesity, over 25 kg /㎡). The results were analyzed statistically using ANCOVA, and Bonferroni test was used in the event of a significant F-ratio (p<.05). Systolic blood pressure (SBP) and diastolic blood pressure (DBP) in the obesity group was significantly higher than the normal group, respectively (p<.05).VO₂max in the obesity group was significantly lower than the normal and overweight groups, respectively (p<.05). Isokinetic thigh muscle strength in the normal group was significantly higher than obesity group at three variables (knee flexion left, KFL; knee extension right, KER; knee extension left KEL), respectively (all, p<.05). The results of the push-ups, in the obesity group was significantly lower than the normal group (p<.05). Ages that can be controlled through the analysis of covariance, taking into account the results of this study in accordance with the increase of age, the BMI affects respectively.

대학생들의 일상적 신체활동에 대한 주관적 강도 등급 지각수준

이대택(Dae Taek Lee),이운용(Woon Yong Lee),손윤선(Youn Sun Son),진정권(Jung Kwon Jin),이명천(Myung Chun Lee) 한국사회체육학회 2010 한국사회체육학회지 Vol.0 No.39

This preliminary study was designed to survey general physical activity types of young Korean adults. In addition, perception of intensity for daily activities were compared to the known physical activity compendium for estimating metabolic equivalent (MET). A group of college students (44men, 25±2yrs, 175±5cm, 71±9kg, 23±3kg·m-2; 21women, 23±1yrs, 165±5cm, 51±6kg, 19±2kg·m-2) was selected and they responded to one survey and two questionnaire sessions. For the survey, they wrote down all the activities occurring at normal days. Based on the activities written, 55 activities were arbitrary selected and utilized to construct a questionnaire, which asked perceived intensity of daily activities. The intensity was scaled at 10 levels from 1; `comfortable and no physical endeavor at all` to 10; `physically challenged and exerted can`t be maintained`. The same questionnaire was administered twice with 2 days apart for the test-retest reliability. A total of 116 activities was identified, and the average number of written activities was 18.3±6.2 for men and 20.0±8.0 for women (ranged 8-35). The frequency of written activity for >41, 31-40, 21-30, 11-20, and 10> was 7, 4, 5, 18, and 82, respectively. The MET level distribution for 55 activities was 9, 21, 14, 5, and 6 for 1≥, 1.01-2, 2.01-3, 3.01-4, and >4.01 MET, respectively. The perception level for actual MET of 0.99, 1.70, 2.61, 3.66, and 6.75 was 1.75, 2.86, 3.69, 3.83, and 4.94, respectively. The regression analysis revealed the slope of preception for MET was 0.387. Based on the results, It was considered that more than 80% of daily activities was less than 3 MET intensity. Respondents overestimated activity intensities below 4 MET and underestimated above 4 MET. The slope of perception was less steeper than the actual MET.

최대산소섭취량을 추정하기 위한 간접방법의 비교

김연평(Kim Yeon-Pyung),장명재(Jang Myung-Jae),진정권(Jin Jung-Kwon) 경희대학교 스포츠과학연구원 1998 체육학논문집 Vol.26 No.-

  The purpose of this investigation was to compare the acceptability of three exercise tests for estimating maximal oxygen uptake(VO₂max). Sixteen healthy female subjects(M±S.D.=35.38±4.27) performed the maximal treadmill test, submaximal Cycle test(Siconolfi et al. 1982), submaximal Step test(Sharkey, 1977), and submaximal one-mile walk test(Cline et al., 1987).<BR>  VO₂max determined by maximal treadmill test was 38.92±4.06ml/㎏/min. Predicted VO₂max was also estimated from cycle test(31.84±3.84), step test(39.56±3.69), and one-mile walk test(39.57±3.20). Predicted VO₂max were obtained for each subject from heart rate(HR) at submaximal work loads. During the submaximal tests, heart rates were recorded from polar system(Finland).<BR>  Paired sample t-test revealed significant mean difference between criterion treadmill VO₂max and cycle test. The one-mile walk test and step test VO₂max values were not significantly different from the criterion treadmill VO₂max. The correlations between criterion VO₂max and VO₂max estimated from cycle test, step test, and one-mile walk test were r=0.65, r=0.64, and r=0.83, respectively. These results suggest that step test and one-mile walk test are satisfactory predictive method for VO₂max estimation in 30 to 39-year-old females.

운동강도 지표로서 자각도-13 의 유용성에 관한 연구

신창호,김현수,진정권 한국운동과학회 1997 운동과학 Vol.6 No.1

운동강도 지표로서 자각도-13의 유용성에 관한 연구. 운동과학, 제6권 제1호, 33-44, 1977. 본 연구는 운동습관이 있는 사람 65명과 운동하지 않는 사람 60명을 대상으로 첫째, 적정 운동강도로서 자각도-13의 타당성을 검토하고, 둘째 운동습관이 있는 사람과 없는 사람이 테스트 중 부위별 즉 호흡, 하지, 그리고 신체전체가 느끼는 힘든 정도의 차이가 있는지를 검토한 결과 환기역치에 해당하는 자각도는 운동습관이 있는 남자가 12.8, 운동습관이 있는 여자 12.8, 운동습관이 없는 남자가 13.3으로서 운동습관의 유무 및 성별에 상관없이 거의 대부분의 피검자가 13∼15, 즉 '약간 힘들다에서 힘들다'의 범위였다. 결론적으로 트레이닝 상태가 환기역치에 해당하는 자각적 운동강도에 영향을 미치지 않으며 평소에 운동하는 사람이나 운동습관이 없는 사람 모두 환기성 역치에 해당하는 자각도는 '약간 힘들다' 수준으로서 일반인을 대상으로 운동처방을 할 경우 운동강도로서 약간 힘들다의 수준이 적정한 것으로 나타났다. Validity of RPE-13 as optimal exercise intensity. Fxercise Science, 6(1); 33-44, 1997. It was the purpose of this investigation to: 1) validity the ratings of perceived exertion (RPE)-13 at the ventilatory threshold(VT) as the optimal exercise intensity and 2) compare the ratings of perceived exertion (RPEs) in high and low fit individuals when walking and running at comparable exercise intensities. 65 moderately high fit and 50 low fit individuals completed two exercise bouts (graded exercise test) on a treadmill, one uphill walking and the other level running. To determine the effects of state of training on RPE at the VT, RPE were determined in 45 habitually exercised male, 20 female, 34 untrained male, and 16 female. The mean for RPE-VT were 12.8, 12.8, 13.3 and 12.9 for the four groups, respectively. RPEs during graded exercise test for the untrained group with local RPEs(13.5) was significantly greater than both central(12.6) and overall(12.4) RPEs. No significant difference were found between the central(12.9), local(12.8) and overall(12.8) RPEs relative to VT for the moderately trained group. Exercise at the VT was perceived as 'somewhat hard' to 'hard' (RPE=13-15) by both groups. These results suggest that 1) state of training does not affect RPE-VT, 2) that the VT is perceived by trained and untrained subjects as an exercise intensity that is "somewhat hard".