트레드밀에서의 Rockport 걷기검사를 통해 예측된 VO₂max의 타당도 검증을 위한 연구

최재일(Choi, Jae-Il),김재호(Kim, Jae-Ho),전용균(Jeon, Yong-Kyun),신정엽(Shin, Jeong-Yeop) 한국웰니스학회 2020 한국웰니스학회지 Vol.15 No.3

이 연구는 트레드밀 에서의 Rockport 1 mile 걷기검사를 통해 예측된 최대산소섭취량의 타당도를 검증하기 위한 연구로 실시되었다. 연구대상자는 최대운동부하 검사를 필요로 하기에 안전을 위해 20~50세 남성 20명으로 임상적으로 특별한 질환이 없고, 규칙적인 운동경험이 없으며, 체지방율이 25% 이하인 대상자로 선정하였다. Rockport 1 mile 걷기검사를 위한 트레드밀은 Rockport 걷기검사 예측식을 탑재한 (주)헬스원의 트레드밀 장비(HERA 9000pro, KOREA)를 활용하였다. 또한 모든 대상자들은 최대산소섭취량을 직접측정하기 위해 Bruce’s protocol를 통한 점증적 운동부하검사를 실시하였다. 직접검사(준거)에 대한 트레드밀에서의 Rockport 1 mile 걷기검사(예측)의 오차율은 5.43%로 나타났고, 급내상관계수(ICC)는 R=.881로 타당한 결과를 나타냈다. 추후 많은 대상자를 통해 트레드밀에서 Rockport 걷기검사 시 예측된 VO₂max 타당도를 검증하기 위한 연구가 필요하다고 판단된다. This study was conducted to verify the validity of the predicted maximum oxygen intake through Rockport 1 mile walking test in treadmill. Twenty men aged 20 to 50 years were selected as subjects with no clinically specific disease, no exercise experience, and a body fat percentage of 25% or less for safety purpose as this study requires maximum exercise test. The treadmill for the Rockport 1 mile walking test utilized a HealthOne treadmill device (HERA 9000pro, KOREA) equipped with the Rockport walking test prediction equation. In addition, all subjects performed an incremental maximum exercise test through Bruce"s protocol to measure the VO₂.max. The error percentage of the Rockport 1 mile walking test (prediction) on the treadmill for the direct test (reference) was 5.43%, and the ICC(intraclass correlation coefficient) was R=.881. It is considered that a study is needed to verify the validity of the predicted VO₂max when testing the Rockport on a treadmill through a large number of subjects.

자발적으로 발생한 재발성 간의 피막하 혈종 1예

최재신 ( Jae Shin Choi ),김유진 ( Youjin Kim ),박소영 ( So Young Park ),이수연 ( Su Yeon Lee ),이은정 ( Eun Jeong Lee ),신동현 ( Dong Hyun Sinn ) 대한내과학회 2017 대한내과학회지 Vol.92 No.2

외상 또는 응고 장애 등이 동반되지 않는 상태에서 자발적인 피막하 혈종의 발생은 드문 경우이다. 드문 원인이지만 증례로 보고된 경우는 임신과 연관된 자간전증 또는 전자간증 및 hemolysis, elevated liver enzymes, low platelets (HELLP)증후군 등이 있으며 간세포암종, 간샘종 및 간의 악성 및 양성 종양의 파열과의 연관성이 보고된 바가 있다. 또는 의학적 시술, 감염, 약물에 의한 간자색반병도 일부 보고되어 있다. 본 증례는 외상이나 응고 장애 등이 동반되지 않는 상태에서 반복적으로 피막하 혈종이 발생하였으며, 여러 문헌고찰을 통해 확인된 가능한 원인들에 대해 감별하였으나 뚜렷한 원인을 밝혀낼 수는 없었다. 다만, 가능성을 완전히 배제하기 어려웠던 기생충 감염에 대해 항구충제 치료 및 타목시펜 복용과 연관된 간자색반병의 가능성에 대해 타목시펜 중단 등의 조치를 취하였으며, 이후 반복적으로 발생하던 경과가 임상적으로 호전되는 양상을 보였다. 이에 비록 관찰 기간이 충분하게 길지 않지만, 문헌고찰과 함께 보고하는 바이다. A spontaneous subcapsular hematoma of the liver is an unusual clinical phenomenon and is usually associated with trauma, surgery, tumor or pregnancy. We report a case of a recurrent spontaneous subcapsular hematoma of the liver without an identifiable cause. A 52-year-old female presented to the emergency room with acute abdominal pain localized in the right upper quadrant area. Diagnostic workup revealed a subcapsular hematoma in the segment 8 area. The laboratory evaluation was also normal. She was managed conservatively. However, two months later another episode of abdominal pain in the right upper quadrant recurred. Diagnostic workup showed recurrence of a subcapsular hematoma in the segment 6 area. Follow-up evaluation revealed resorption of the previous subcapsular hematomas, as well as a new lesion in the segment 1 area. Herein, we discuss potential causes of this spontaneous subcapsular hematoma of the liver. (Korean J Med 2017;92:177-181)

지지면의 안정성에 따른 재활운동이 만성요통환자의 시상정렬에 미치는 영향

최재일(Choi, Jae-Il),신정엽(Shin, Jeong-Yeop) 한국체육과학회 2020 한국체육과학회지 Vol.29 No.6

The study was conducted for 12 weeks in 30 patients with chronic back pain. The subjects were recruited unstable surface exercise group(USEG, n=15), stable surface exercise group) (SSEG, n=15) was classified, and the measurement of each pre-requisite was performed. After the exercise on unstable and stable support surface, the thalamus alignment and pain of the urethra and the sacral region were measured and the following conclusions were obtained. The lumbar vertebrae, lumbar and lumbar vertebrae, and lumbar angles of all the thalamic sides were significantly increased after the pre-test. Especially, lumbar vertebrae, lumbar and lumbar and lumbar angles were significantly more effective than the exercise of stable support. Therefore, this study suggests that alignment of the lumbar vertebrae by exercise is effective, which also affects pain relief. Especially, exercise treatment in unstable support surface was significantly higher in the effect. If these results are utilized in follow-up studies, it is expected that it will be useful basic data for various exercise programs and therapeutic therapy development.

논문 : 연출가와 배우의 "행동 동사" 사용 방법에 관한 연구

최재오 ( Jae Oh Choi ),신소현 ( So Hyun Shin ) 한국연극교육학회 2015 연극교육연구 Vol.27 No.-

The purpose of this study is intended to clarify the concept of an ‘action verb’ derived from ‘the method of acting’, and to find out the proper way to use action verb for director and actor. The use of action verb; when actors read their lines in a script, they discover ‘the action’, and apply it into the ‘verb’ form. The concept of action verb is not just a word for action, but the way more effectively describes the method of actor’s acting; it aids actors to act dramatically and dynamically. The concept of action verb is obvious, and it offers clear direction of character``s behavior. That’s why it is useful as an actor’s tool of communication and analysis of text. Despite of the usefulness of this verb, it is hard to apply to text. It means there is not only a lack of awareness about action verb, but also there is a major problem that none of guideline about actable verbs exists to help how to use these verbs. Thus, there are three methods to select action verb; (1)objects, (2)relationships, and (3)appropriateness. First of all, actors are necessary to determine either how they are going to make the other actors closer or further(acceptance/rejection), or how they will make the others pleasant or unpleasant. Also, the intensity of these actions depends on the relationship between characters. It can be defined as characters’ cohesion, so the action is distinguished into social relationships and personal relationships. A part of Act 1: the dialogue between Masha & Medvedenko from Chekhov’s <Seagull> was used as an example for actioning. The two characters’ conversation can be based on ‘the social relationship (acceptance/rejection)’ and ‘the personal relationship (pleasant/ unpleasant).’

만성요통환자의 시상정렬 및 통증완화를 위한 자이로토닉 운동의 효과

최재일(Choi, Jae-Il),신정엽(Shin, Jeong-Yeop) 한국웰니스학회 2021 한국웰니스학회지 Vol.16 No.2

이 연구는 12주간의 자이로토닉 운동프로그램이 만성요통환자의 시상정렬과 통증완화에 미치는 영향을 규명하고자 실시되었다. 40~50대 중년 남성 20명을 대상으로 통제집단(n=10), 자이로토닉 운동집단(n=10)으로 분류하였고, 자이로토닉 운동집단의 경우 12주간 주4회 운동빈도로 1회 운동 시 50분간 운동을 실시하였다. 상호작용 효과를 분석하기 위하여 반복측정 분산분석(repeated measure ANOVA)을 실시한 결과 다음과 같이 나타났다. 시각적 통증 사상척도에서 유의한 상호작용 효과가 나타났는데 이는 자이로토닉 운동집단에서 사전에 비해 사후에 유의하게 감소한 것으로 나타났고 사후 시점에서 통제집단에 비해 유의하게 낮은 것으로 나타났다. 시상정렬의 경우 요추전만각(LLA), 요천추각(LSA)에서 유의한 상호작용 효과가 나타났는데 이는 자이로토닉 운동집단에서 사전에 비해 사후에 유의하게 증가한 것으로 나타났고 사후 시점에서 통제집단에 비해 유의하게 높은 것으로 나타났다. 이상의 결과를 종합해보면 규칙적인 자이로토닉 운동은 만성요통환자의 시상정렬과 통증완화에 긍정적인 영향을 미칠 것으로 판단된다. The purpose of this study was to investigate the effects of 12 weeks of gyrotonic exercise program on thalamic alignment and pain relief in patients with chronic back pain. Twenty middle-aged men in their 40s and 50s were classified into control group(n=10) and gyrotonic exercise group(n=10). The gyrotonic exercise group was exercised for 50 minutes at once exercise for 4 times a week for 12 weeks. As a result of repeated measure ANOVA, it was as follows. The visual pain thought scale showed significant interaction effect, which was significantly decreased in the gyrotonic exercise group compared to the pre-test and significantly lower than the control group at the post-test. In the case of the thalamus alignment, significant interaction effect was shown in the lumbar vertebrae (LLA) and lumbar vertebrae (LSA), which showed a significant increase in the gyrotonic exercise group compared to the pre-test and significantly higher than the control group at the post-test.The results of this study suggest that regular gyrotonic exercise has a positive effect on the thalamic alignment and pain relief in chronic back pain patients.

비만 유 · 무에 따른 저항성운동이 일시적, 장기적 Irisin 및 Myonectin 발현에 미치는 영향

최재일(Choi, Jae-Il),신정엽(Shin, Jeong-Yeop) 한국웰니스학회 2021 한국웰니스학회지 Vol.16 No.4

이 연구는 비만 유 · 무에 따른 저항성운동이 일시적, 장기적 irisin 및 myonectin 발현에 미치는 영향을 규명하기 위해 실시되었다. 20대 남성을 대상으로 실시되었으며 일반집단(NOG, n=20)의 경우 체지방률 20%이하인 남성 20명, 비만집단(OG, n=20)의 경우 체지방률 25%이상인 남성 20명을 선정하였다. 반복측정 분산분석을 실시한 결과 일시적 저항성운동(80%1RM, 8 reps, 2sets)에 따른 irisin 발현 수준에서는 NOG에서 안정시에 비해 운동종료 30분 후 유의하게 증가하였지만 OG에서는 유의한 차이가 나타나지 않았다. Myonectin 발현 수준에서는 모든 집단에서 안정시와 운동종료 30분 후 사이에 유의한 차이가 나타나지 않았고, 안정시와 운동종료 40분 시점에서 NOG가 OG에 비해 유의하게 높은 것으로 나타났다. 일시적 저항성운동 실험 종료 후 모든 대상자들을 일반운동집단(NORG, n=10), 일반통제집단(NOCG, n=10), 비만운동집단(ORG, n=10), 비만통제집단(OCG, n=10)으로 재분류하여 8주간 저항성운동을 실시하였다. 8주 후 일반집단의 종속변인의 차이를 비교하기 위해 반복측정 분산분석을 실시한 결과 다음과 같이 나타났다. 일반집단에서는 체지방률이 NORG가 NOCG보다 운동전에 비해 8주후 유의하게 감소한 것으로 나타났고, 근육량은 NORG가 NOCG보다 운동전에 비해 8주후 유의하게 증가한 것으로 나타났다. 또한 안정시 irisin과 myonectin은 NORG가 NOCG보다 운동전에 비해 8주후 유의하게 증가한 것으로 나타났다. 비만집단에서는 체중과 체지방률이 ORG가 OCG보다 운동전에 비해 8주후 유의하게 감소한 것으로 나타났고, 근육량은 ORG가 운동전에 비해 8주후 유의하게 증가한 것으로 나타났다. 또한 안정시 irisin과 myonectin은 ORG가 OCG보다 운동전에 비해 8주후 유의하게 증가한 것으로 나타났다. 이상의 결과를 종합해보면 운동경험이 없는 상태에서 일시적 저항성운동이 비만남성의 irisin 및 myonectin 발현 수준에는 영향을 미치지 못하는 것으로 나타났다. 그러나 장기적 저항성운동은 체지방률의 감소와 근육량의 증가로 인해 비만남성의 안정시 irisin 및 myonectin 발현 수준을 높이는 것으로 나타났는데 이는 근육량과 체지방률 수준이 irisin 및 myonectin 발현 수준에 영향을 미치는 것으로 사료된다. This study was conducted to investigate the effect of resistance exercise according to obesity on acute and long-term irisin and myonectin expression. This was conducted for men in their 20s. For the general group, 20 men with a body fat percentage of less than 20%(non-obese men group, NOG, n=20) and for the obese group, 20 men with a body fat percentage of 25% or more were determined(obese men group, OG, n=20). As a result of repeated measures ANOVA, the irisin expression level according to acute resistance exercise (80% 1RM, 8 reps, 2 sets) increased significantly in NOG 30 minutes after the end of exercise compared to at baseline, but there was no significant difference in OG. Myonectin expression level did not show a significant difference between resting time and 30 minutes after exercise in all groups, and NOG was found to be significantly higher than that of OG at baseline and 30 minutes after exercise. After the acute resistance exercise experiment, all subjects were reclassified into NORG (non-obese men resistance exercise group, n=10), NOCG (non-obese men control group, n=10), ORG (obese men resistance exercise group, n=10), and OCG (obese men control group, n=10) and resistance exercise was performed for 8 weeks. After 8 weeks, the results of repeated measurement ANOVA showed as follows. In the non-obese men groups, the percentage of body fat significantly decreased after 8 weeks in NORG than before exercise, and muscle mass increased significantly after 8 weeks in NORG compared to before exercise compared to NOCG. Also, irisin and myonectin at rest were significantly increased after 8 weeks in NORG than before exercise compared to NOCG. In the obese group, body weight and body fat percentage decreased significantly after 8 weeks compared to before exercise in ORG, and muscle mass increased significantly in ORG after 8 weeks compared to before exercise. Also, irisin and myonectin at rest were significantly increased after 8 weeks in ORG than before exercise compared to OCG. In summary, acute resistance exercise did not affect irisin and myonectin expression levels in obese men. However, long-term resistance exercise was shown to increase irisin and myonectin expression levels at rest in obese men due to a decrease in body fat percentage and an increase in muscle mass.

진양호의 식물성플랑크톤 군집에 관한 연구

김한순,최재신,정준,김도한 ( Han Soon Kim,Jae Shin Choi,Jun Chung,Do Han Kim ) 한국하천호수학회 1995 생태와 환경 Vol.28 No.3

Phytoplankton samples were collected during May, July, September and November of 1993 from three stations in Jinyang lake. Phytoplankton community structure, biomass, Chlorophyll a concentration and dominant species were investigated in this lake, A total 306 taxa were encountered during the survey period, and the most important algal groups were Chlorophyceae with 162 taxa and Bacillariophyceae with 111 taxa and followed by the Euglenophyceae(15 taxa), Cyanophyceae(9 taxa), Chrysophyceae(4 taxa), Dinophyceae(3 taxa) and Xanthophyceae(1 taxon). The total cell numbers and Chlorophyll a concentration were lowest in May(1,240,923ℓ^-1 and 11.36 mg m^3) and highest in September(8,029,OO3ℓ^-1 and 45.08mg m^3). The phytoplankton community in this lake was characterized by Bacillariophyceae shared the very high contribution (82.8%∼99.8%) of the total biomass throughout the all surveyed period. The predominant species were Aulacoseira ambigue , Cyclostephanos dubius, Cyclotella ocellata and Cyclotella stelligera and these dominant species accounted for 21.4% to 65.8% of the total biomass.

지지면의 안정성에 따른 재활운동이 두부 전방전위 자세 및 호흡기능에 미치는 영향

신정엽(Shin, Jeong-Yeop),최재일(Choi, Jae-Il) 한국체육과학회 2018 한국체육과학회지 Vol.27 No.5

The purpose of this study was to investigate the effect of exercise on the stability of the support surface, posture, posture, muscle activity, and respiratory function in 30 adult male twenties with head posture. With regard to study participants, 30 adult males in their twenties were classified into unstable surface exercise group(n=10), stable surface exercise group(n=10) and control group (n=10). And according to the results of comparing·analyzing the measured value obtained in the pretest and posttest after carrying out the exercise program for 12 weeks, the major findings of this study are as follows. CLA and REM showed a significant interaction effect(p<.05). As a result of Post-hoc test showed that USEG was significantly higher than CG and SSEG at 12 weeks and significantly increased at 12 weeks after USEG alone(p<.01). AWB also showed a significant interaction effect(p<.05). As a result of post-hoc test, the CG was higher than USEG at 12 weeks, and SSEG and USEG were significantly decreased after 12 weeks than before(p<.01). FVC was significantly increased in the SSEG and USEG after 12 weeks compared to the CG(p<.05),(p<.01). FEV1 showed a significant interaction effect(p<.05). As a result of Post-hoc test showed that the CUSEG was higher than CG at 12 weeks, and SSEG and USEG were significantly increased after 12 weeks than before(p<.05). In conclusion, it was verified that an exercise on unstable surface a positive effect on an improvement in respiratory function, and forward head posture.

임하호의 식물 플랑크톤 군집구조

김용재,최재신,김한순 ( Yong Jae Kim,Jae Shin Choi,Han Soon Kim ) 한국하천호수학회 1997 생태와 환경 Vol.30 No.4

Phytoplankton communities are investigated at four stations in Lake Imha from March, 1992 to November, 1994. Phytopalnkton are identified from 234 taxa in 1992 to 302 taxa, in 1994. Standing crops are the highest value in 1992 and the lowest value in 1993, and slowerly increased in 1994. Dominant species are Cyclotella pseostelligera and 13 taxa. Among them, Anabaena solitaria f. planctonica is bloomed during the season the high Total-N/Total-P ratio. This result is guessed the difference between the water environment of Korea and other nations.

고유수용성감각 강화훈련이 유소년 축구선수들의 무릎 관절위치감각, 운동반응시간 및 드리블능력에 미치는 영향

신정엽(Shin, Jeong-Yeop),최재일(Choi, Jae-Il) 한국체육과학회 2018 한국체육과학회지 Vol.27 No.6

The purpose of this study was to investigate the changes of Joint Position Sense of the knee, motor response time and dribbling ability according to the proprioceptive training for 12 weeks in youth soccer players. The grouping was classified into a proprioceptive training group (PTG, n=10), a general training group (GTG, n=10) and a control group (CG, n=10). After the end of the experiment, statistical analysis was carried out as follows. There was a significant interaction effect on joint position sense of the knee (p<.01). After post-hoc, PTG showed higher position sensory function than CG at 12 weeks. There was a significant interaction effect on reaction time (p<.01). After post-hoc, PTG showed higher position sensory function than GTG and CG at 12 weeks. Dribbling ability did not show any significant interaction effect, but GTG and PTG showed significant dribble speed after 12 weeks compared to 0 week (p<.01), (p<.05). It is considered that the proprioceptive sensory strengthening training is a more effective exercise for improving joint position sense and reaction time and it is an important study result in the youth soccer player training program plan.