• The Journal of Korean Physical Therapy
• /
• 제12권1호
• /
• pp.9-13
• /
• 2000

The purpose of this study was to determine the overflow effect and cross training effect of isometric quadriceps training that performed in specific angle of unilateral let. Ten healthy students with an average age of 24 years$(24.1\pm1.3)$, were participated in this study. Then 5 subjects in each group were chosen at random to train using only right quadriceps muscle two time per day(group 2), five times a week and the other 5 subjects(group 1) were chosen to train one times per day, five times a week for 2 weeks at only 50 degrees (contract 6 seconds, rest 10 seconds, 3 sets). Before and after the training, isometric quadriceps muscle testing of the both leg was Performed at three different angles, 60, 50 and 40 degrees respectively by BHN-COM (isokinetic dynamometer) in sitting position. The data was analyzed with paired t-test to determine significant difference between before and after training. In this study, we have found that the isometric quadriceps muscle training on specific angle of right side produced overflow effect In healthy subjects. However, increasing the peak torque of specific angle(training angle) of trained limb did not have an effect on increasing the peak torque of contralateral limb. These results demonstrate that the cross training effect did nut found in this study but a alight increase of peak torque of the untrained limb would recognized the possibility of cross training effect.

• 대한인간공학회지
• /
• 제14권1호
• /
• pp.97-104
• /
• 1995

The widespread use of VDU has improved the efficiency of information transmission between man and machine, but has caused new occupational health and ergonomics problems. In this study, we tried to construct a fuzzy hyman performance model of VDU workers in Korea. Fuzzy inferences of human perfor- mance are obtained from the fuzzy inference rule with the job difficulty, CFF, SACL, Type A. and the degree of concentration in VDU work. Eight healthy female undergraduate students at Kyungnam university for subjects aged 20 to 23 years were examined in this experiment. They calculated continuous addition, subtraction, and multiplication of 1 or 2 digit numbers that were produced randomly on the CRT. Subjects peoformed two types of a numeric operation, which easy and difficult work produced 400 and 600 problems within a 40 minute work session, respectively. Subjects were tested over two workdays according to the type of work(easy and difficult) consisting of four 40 minutes work sessions in the morning. Each work lasted for five minutes with a ten minutes rest break. 117 fuzzy inference rules were obtained from the experimental data. The value of consequent part was obtained by a descent method. The difference between real human error and estimated value of fuzzy inference was $1.8075{\pm}1.8591%(M{\pm}SD)$. The difference in easy and diffcult works were $2.69{\pm}2.13%$ and $0.92{\pm}0.93%$, respectively.

• Journal of Nutrition and Health
• /
• 제36권7호
• /
• pp.720-728
• /
• 2003

This study was conducted to evaluate changes in plasma concentration and urinary excretion of carnitine, as well as plasma lipid level and fatty acid composition, caused by short term supplementation of carnitine in humans. Ten healthy male subjects (21.2 $\pm$ 0.5 years old) received oral carnitine supplementation (4 g/day) as tablets for two weeks. Fasting blood and random urine samples were collected from each subject both prior to and at the end of carnitine supplemention program. Following the 2 weeks of carnitine supplementation, plasma total carnitine (TCNE) concentration increased 20% (85.1 $\pm$ 7.4 vs 67.3 $\pm$ 9.1 $\mu$ mol/1, p> 0.05), while urinary excretion of total carnitine increased ten times compared to the value measured prior to the supplementation (3051 $\pm$ 692 vs 278 $\pm$ 90.1 $\mu$ mol/g creatinine, p < 0.01). Non-esterified carnitine (NEC) comprised from 71 to 88% of TCNE in plasma, and from 32 to 40% of TCNE excreted in the urine. Two weeks of carnitine supplementation in healthy adults significantly elevated plasma level of acid soluble acylcarnitine (ASAC) which is esterified mostly with short chain fatty acids (21.6 $\pm$ 1.6 $\mu$ mol/l) compared to the value measured prior to the supplementation (6.4 $\pm$ 0.8 $\mu$ mol/l) (p < 0.05). Carnitine supplementation significantly increased plasma HDL-cholesterol level (p < 0.05), and decreased the atherogenic index (p < 0.05), but failed to cause any significant change in plasma levels of total cholesterol, triglyceride, and free fatty acids. Plasma triglyceride and phospholipid fatty acid compositions were not significaly affected as well by the oral supplementation of carnitine in subjects with normal range of blood lipid levels.

• Journal of Nutrition and Health
• /
• 제23권4호
• /
• pp.270-278
• /
• 1990

This study was an attempt to investigate the usefulness of maltitol as an alternative sweetener. The acute effects of oral ingestion of 50g of maltitol or glucose on blood glucose and insulin levels following test dose were investigated by using five healthy normal subjects and ten diabetic patients. The data demonstrated marked differences between the utilization of maltitol and of glucose in both groups. Blood glucose and insulin responses to glucose were significantly greater than to maltitol in normal subjects(p<0.05). In diabetic patients, the peaks of the mean increment in blood glucose concentration after glucose and maltitol were reached at 60 minutes with mean values of 135mg/dl and 49mg/dl, respectively, and these differences were statistically significant(p<0.001). As for blood insulin responses in diabetic patients, the peak of the mean increment after glucose was 25.03$\mu$U/ml at 120 minutes. In contrast insulin responses to maltitol were significantly lower than to glucose(p<0.05), and the peak value was 7.98$\mu$u/ml at 60min. From these results it can be concluded that ingestion of maltitol resulted in significantly lower blood glucose and insulin increments than did glucose in both normal and diabetic patients.

• 대한통합의학회지
• /
• 제2권3호
• /
• pp.31-37
• /
• 2014

Purpose : Delayed onset muscle soreness(DOMS) is a common problem that can interfere with rehabilitation as well as activities of daily living. The purpose of this study was to compare the effect of both trascutaneous electrical nerve stimulation(TENS) Micro current(MC) and only normal Therapy on Delyed Onset Muscle Soreness(DOMS). Method : The Methods ten untrained and male volunteer subjects were randomly assigned to one of two treatment groups: 1) a group that received TENS (60Hz) MC($60{\mu}A$, 3pps) a control group that received no MC treatment. Subjects performed repeated eccentric exercise of the non-dominant forearm flexor muscle with submaximal intensity by the simply designed eccentric exercise devices. Treatments were applied after 24hours and 48hours. Subjects attended on two consecutive days for treatment and measurement of paining(visual analogue scale: VAS) and CK(Creatine kinase) on a daily basis. Measurements were taken after treatment. Results : 1) There were no significant differences between TENS and MENS by two-way repeated ANOVA. The Results that t-test for VAS revealed significant differences within TENS group. 3) The t-test for VAS, and Creatine Kinase of time revealed significant differences within MC group. Conclusion : These findings suggest that both TENS and MENS had effect on DOMS.

• Journal of Nutrition and Health
• /
• 제19권6호
• /
• pp.409-419
• /
• 1986

Prevalence of obesity and dietary consumption of ten-year-old school children in Seoul were investigated. Three hundred forty boys and three hundred forty two girls from families of various housing pattern in Seoul were chosen for this study. Informations of the stduy were obtained from April 22 to June 11, 1985, by means of prepared questinnaires for general environmental factors, anthropometry for height, weigth and triceps skinfold theickness and interview to get 24 -hour food intakes of individuals. All the data collected were analyzed by using SPSS program. Average nutrients intakes of the subjects were satisfactory with respect toquality or quantity . Children from A group tended to consume more nutrients than B or C group. Physical growth of the subjects were similar to the ones for average school children in Seoul, but greater than korean national average. Children from A group were taller and heavier than B group whom were taller and heavier than C group . Prevalence of obesity were 15.7 % and 11.7 % of the subjects according to standards of relative body weight and triceps skinfold thickness. Higher prevalence were observed in boys than in girls and children from A group than B, and B group than C group. so therefore it could be summarized that children from A group consumed more nutrients, had better physical growth, and became obese more frequently than children from B or C.

• 한방비만학회지
• /
• 제17권1호
• /
• pp.54-60
• /
• 2017

비만을 주소증으로 내원하여 LFT를 시행하고, 한약 치료를 포함한 비만 치료 경과 후 다시 추적한 결과 체중 감량과 간효소 수치의 개선 경향을 보인 10예를 보고하였다. 본 연구를 토대로 한약 치료를 포함한 한방 비만치료 시 유효성과 안전성에 대한 근거를 더 확보해나갈 수 있을 것으로 생각된다.

• 한국식생활문화학회지
• /
• 제10권5호
• /
• pp.449-455
• /
• 1995

This study was undertaken to investigate dietary status, food habits, and nutritional knowledge of university students majoring in judo (n=239) and to evaluate the effect of dietary behavior on their athletic activities. Mean daily dietary intakes (3,854.0 kcal) were similar to mean daily energy consumptions (3,975.5 kcal). Average daily intakes of most vitamins and minerals were higher than Korean Recommended Dietary Allowances except for the intake of vitamin A. Self-confidence on judo affected dietary behavior of the subjects: Subjects who had more self-confidence on judo showed more interest in good nutrition and concerned more about foods which could promote their athletic activities. Many side effects were manifested after sudden weight control for judo competition during school days. Therefore, it is suggested that good education on nutrition is necessary not only for athletic students, but also for coaches and trainers of the students. Ten weeks of education on nutrition significantly improved both food habits and nutritional knowledge of the subjects. Food habits were positively correlated with self-confidence on judo. Therefore, it is suggested that improvement of food habits through good education on nutrition would be helpful to improve athletic activities of the students.

• Journal of Information Science Theory and Practice
• /
• 제2권3호
• /
• pp.6-17
• /
• 2014

The purpose of this study is to examine to what extent the context in which people interact with online information affects people's credibility perceptions. In this study, credibility assessment is defined as perceptions of credibility relying on individuals' expertise and knowledge. Context has been characterized with respect to three aspects: Context as user goals and intentions, context as topicality of information, and context as information activities. The data were collected from two empirical studies. Study 1 was a diary study in which 333 residents in Michigan, U.S.A. submitted 2,471 diary entries to report their trust perceptions associated with ten different user goals and nine different intentions. Study 2 was a lab-based study in which 64 subjects participated in performing four search tasks in two different information activity conditions - information search or content creation. There are three major findings of this study: (1) Score-based trust perceptions provided limited views of people's credibility perceptions because respondents tended to score trust ratings consistently high across various user goals and intentions; (2) The topicality of information mattered more when study subjects assessed the credibility of user generated content (UGC) than with traditional media content (TMC); (3) Subjects of this study exerted more effort into making credibility judgments when they engaged in searching activities than in content creation. These findings indicate that credibility assessment can or should be seen as a process-oriented notion incorporating various information use contexts beyond simple rating-based evaluation. The theoretical contributions for information scientists and practical implications for web designers are also discussed.

• 한국운동역학회지
• /
• 제23권2호
• /
• pp.141-148
• /
• 2013

The purpose of this study was to investigate the scapulothoracic joint movement between different weight bearing contributing to effective bench press exercise. Ten male subjects participated in this study. All subjects were tested on the flat bench press machine which modified weight (50% and 70% of 1RM) and subjects were performed two different conditions(none protraction condition and protraction condition). Weight bar height and vertical velocity, EMG activation was measured using 3D motion capture system and wireless EMG analysis system. As the results, none protraction condition showed that it is more concentrate better pectoralis major muscle activation than protraction condition and middle pectoralis major, anterior deltoid and triceps brachii was significant higher integrated EMG in 70% of 1RM condition. In conclusion, limited scapulothoracic joint movement was more effective activated pectoralis major muscle all the weight through, while we could not find that it was not affected integrated EMG on eight muslces related to shoulder complex between scapulothracic joint movement conditions.