• The Journal of Korean Medicine
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• v.27 no.4
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• pp.191-197
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• 2006

Objectives : The aim of this study was to evaluate the anti-depressant effect of Chilbokum on rats under the forced swimming test (FST) Methods : The rats were treated with the herbal extract, Chilbokum. In order to induce depression-like symptoms, the FST was conducted afterwards. The immobility time was measured during a 5-min experimental session. The alterations of the 5-HT level in the hypothalamus and hippocampus and the change of corticosterone level in the blood induced by FST were determined in the rats. Results : The results were as follows: 1. The immobility time during 5 min of FST in the drug administration group showed significant decreases compared with the control group (p<0.05). 2. The FST+Chilbokum group had significantly increased 5-HT levels of the hypothalamus and hippocampus, compared with the control group (p<0.05, respectively). 3. The FST+Chilbokum group had significantly decreased corticosterone levels, compared with the control group (p<0.05). Conclusions : These results demonstrate that the reduced immobility time by Chilbokum may be mediated by the increase in 5-HT level in the hypothalamus and hippocampus, suggesting that Chilbokum has a potential therapeutic efficacy for human depression.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.28 no.4
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• pp.347-359
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• 1992

The movements of three striped jack (Caranx delicatissimus, 24cm of body length) were tracked by ultrasonic telemetry in the Nunoura Bay in August 1990. A school of the striped jack has been released near by the fish farming rafts by Goto branch of the Fisheries Agency and Japan Sea-Farming Association. To investigate the staying area and the swimming pattern of the fish, small size pinger($\Phi$8.5$\times$L35mm, 140dB re 1$\mu$Pa at 1m, 69kHz) was tagged on the dorsal fin without any anesthesia. The movements of three tagged fish are monitored at the same time with four omni-directional hydrophones. The locations of the fish are calculated by the hyperbolic method and tracked by a technique so called time division scheme which uses both the pulse interval and the phase. Three pingers used have the pulse interval of 1.7, 1.8 and 1.9sec, respectively, and the common pulse duration of 15ms. In results it was capable to estimate behavior right after the release, swimming speeds and approximate moving area of the fish. The movements were tracked for a week continuously, and it was found out that the staying area of the fish was around or under the farming rafts. Sometimes they swam together but most of the time they move separately. The average swimming speed of those fish was about two times of the body length.

• International Journal of Industrial Entomology and Biomaterials
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• v.39 no.1
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• pp.34-38
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• 2019

In this study, we investigated the effect of silkworm, and its by-products on exercise endurance, muscle mass, and fatigue recovery using ICR mice model. Powders of silkworm, pupae, dongchunghacho, and silk powder were suspended in water and feed to mice for 2 weeks. The forced swimming time was increased by 4.3, 4.1 and 2.8 seconds after silkworm, pupae, and dongchughacho administration compared to DW fed group. Increases in exercise ability were achieved by difference mechanism according to feeding materials. Pupae increased muscle mass by 129% compared with the control group which may effect on elongation of swimming time. Dongchunghacho improved the plasma concentrations of fatigue markers such as creatinine, blood urea nitrogen (BUN), and D-lactate. Silkworm administration showed dual effect, the muscle mass induction (114% vs. control) and anti-fatigue (plasma creatinine, BUN, and D-lactate were 63, 75, and 78% vs. con) effect which contributed most elongated swimming time. In conclusion, silkworm and its by-products including pupae and dongchunghacho with the predominant protein and bioactive components improved muscle mass and showed anti-fatigue effect which could promote exercise performance ability.

• The Journal of Korean Obstetrics and Gynecology
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• v.20 no.2
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• pp.155-163
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• 2007

Purpose: This study was conducted to investigate the muscle anti-fatigue effects of Morindae officinalis Radix liquid extract. Methods: 4-6 weeks old ICR rats are used in the study, and we administered the extracts powder of Morinda officinalis concentration of 1, 10, 100mg/0.3 ml to each to rats(MO group) once a day for each 30 and 60 days. After 30 and 60 days, we examined the plasma concentraion of lactate dehydrogenase, glucose. And we measured the persistent time of swimming exercise test and conducted grip strength test Results: We found that there are no significantly differences between the control and the treatment group in the plasma concentration of activity level of lactate dehydrogenase. And we found that in 30days group, level of glucose concentration is significant. In swimming exercise test, as administration time and concetration growed up, swimming time is increased. And in grip strength test, as concentraion is growed up, grip strength is increased. Conclusion: This study show that Morinda officinalis is effective against muscle fatigue.

• The Journal of Internal Korean Medicine
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• v.30 no.1
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• pp.94-106
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• 2009

Objectives : This study aimed to evaluate the effect of Wongisaengmaek-san (extracted with water or 50% ethanol) on antioxidative activity and recovery of fatigue induced by weight-loaded forced swimming exercise. Methods : Antioxidant activity of Wongisaengmaek-san was evaluated in terms of total amount of polyphenol, 1.1-diphenyl-2-picrylhvdroxyl (DPPH) radical scavenging activity and xanthine oxidase inhibition. The anti-fatigue effect of Wongisaengmaek-san was investigated using an acute weight-loaded forced swimming test by monitoring swimming test times and blood biochemical parameters creatinine. BUN, lactic acid dehydrogenase (LDH), free fatty acid (FFA) and lactic acid (LA). Results : 1. 50% EE (ethanol extract) had 2.3 times higher amount of total polyphenol compared to water extract. 2. It was identified that 50% ethanol extract showed enhancement of xanthine oxidase inhibition and DPPH scavenging effect in vitro. 3. According to anti-fatigue effect in the scale of 5% weight loaded mouse swimming test, both water and 50% ethanol extract showed significant improvement of swimming time elongation respectively, and 50% ethanol extract induced a more positive result. 4. After swimming for 1% weight-loaded mouse. water extract and 50% ethanol showed significant anti-fatigue effect with manifestation of blood sampling among both of the intervention: 50% ethanol extract showed a greater result. Conclusions : 50% ethanol extract of Wongisaengmaek-san has more effective antioxidant activity and anti-fatigue than water extract.

• Journal of Haehwa Medicine
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• v.4 no.1
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• pp.357-371
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• 1995

We have completed a study to measure the contents of glucose, BUN, creatinine. LDH, and T-protein with respect to a fatigued condition in the bloods of rats which a constant swimming is loaded and to measure the maximun swimming time of mice The test has been carried out as a part of the basic study on the efficacy of B. E. P. (Biological Energy Projector) for emitting a light energy having a specific wavelength out of far-infrared rays. As a result. We have reached the following conclusions: 1. At testing of mice's maximun swimming time, all of B.E.P.(2. 4. 8. 24hrs) treated group have been increased in comparison with the control group, but only 24hrs-B.E.P. treated group significantly increased during 4 weeks. 2. The contents of glucose, BUN. creatinine, LDH, and T-protein measured immediately after the swimming of mice have been distinctly changed but not been significantly changed at their increase and decrease in comparison with the control group. 3. At 3rd day out of the swimming loading, the contents of glucose in the blood serum of the white rat have been distinctly increased in comparison with the control group. And 24hrs-B.E.P treated group surpassed 8hrs-B.E.P. treated group. 4. At 1st and 3rd day, the contents of creatinine in the blood serum of the white rat have been distinctly increased at B.E.P. (8, 24hrs) treated groups in comparison with the control group and have been recovered to the condition of the normal group. 5. After three days, the contents of BUN in the blood serum of the white rat have been significantly decreased in B.E.P.(8, 24hrs) treated groups at 3rd day in comparison with the control group and have been recovered to the condition of the normal group. 6. The contents of LDH in the blood serum of the white rat have been decreased in B.E.P.(8, 24hrs) treated groups at 3rd day in comparison with the control group, in particular 24hrs-B.E.P. treated group has been decreased distinctly than the normal group. 7. The contents of T-protein in the blood serum of the white rat have been distinctly increased in B.E.P. (8, 24hrs) treated groups at 3rd day in comparison with the control and normal group. As the above results, it has been proved that the execise of mice and the fatigue metabolism of rats were influenced by the light energy emitted the B.E.P., and it has been also proved that the external stimulation could be used as a preferable stimulative factor for the biological metabolism. If the clinical training and study are positively achieved, the B.E.P. would be used as curative means and preventive measures for helping human body.

• Korean Journal of Food Science and Technology
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• v.37 no.4
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• pp.648-655
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• 2005

Effects of two types of formula designed for commercial product on forced-swimming capacity and related biochemical parameters of Sprague-Dawley rats were evaluated. Treatment groups were fed diet supplemented with 4.56% formula A (EFA: exercise-trained and formula A-supplemented group) or B (EFB: exercise-trained and formula B-supplemented group) for 4 weeks. All groups were regularly trained twice a week to be accustomed to swimming. After 4 weeks, each group was divided into two subgroups: 90 min swimming (90-min subgroups) and swimming until exhaustion (all-out subgroups). Serum was collected, and skeletal muscles were dissected out after swimming. Forced-swimming time until exhaustion was significantly longer (p<0.05) in EFA and EFB groups than that of exercised control group. Among 90-min subgroups, serum ammonia level of EFB group was significantly lower than that of exercised control group (p<0.05). Among all-out subgroups, serum lactate levels were not significantly different among exercised control and treatment groups, whereas serum-free fatty acid levels of EFA and EFB groups were significantly lower than that of exercised control group (p<0.05). In conclusion, EFA and EFB groups enhanced forced swimming capacity of rats by increasing fat utilization and delaying accumulation of serum fatigue factor.

• Journal of the Korean Applied Science and Technology
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• v.40 no.6
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• pp.1201-1212
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• 2023

This study aimed to analyze the changes in underwater anxiety and water safety consciousness among college students through participation in survival swimming education and the relationship between these changes and various factors. To achieve this, 200 college students who were participating in survival swimming education from universities located in the Busan-Ulsan-Gyeongnam region were selected as participants using convenience sampling. Among them, a final valid sample of 191 students was utilized. Data analysis was conducted using SPSS 25.0 statistical software, including exploratory factor analysis, reliability analysis, paired sample t-test, repeated measures ANOVA. The results are as follows: Firstly, college students who participated in survival swimming education showed a decrease in post-test underwater anxiety and an increase in water safety consciousness compared to pre-test. Secondly, the interaction between the groups based on the presence or absence of swimming education experience and time showed a significant effect only in the safety education, a sub-factor of water safety consciousness. Based on these results, the effectiveness of survival swimming education for college students could be confirmed, and further directions for expanding survival swimming education in university settings could be considered.

• Korean Journal of Applied Biomechanics
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• v.17 no.3
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• pp.69-80
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• 2007

The purpose of this study was to investigate the difference of ground reaction forces of swimming athletes during their starting motion and to find out the most effective starting motions which were used in swimming athletes. The subjects were 9 male and 8 female high school swimming athletes who were athletic career over 7 years and used three starting motions in competition. The ground reaction forces were measured from each athletes performing three starting motion each of the open grap starting motion, closed grap starting motion and track starting motion. For the measurement, the force platform of AMTI company was utilized, and the analysis on measured ground reaction forces were used of Biosoft(Ver. 1.0). The items measured were stance time, Fz max deceleration force and Fz max deceleration force time, Fz mid stance force and Fz mid stance force time, Fz max acceleration force and Fz max acceleration force time, Torque maximum and Torque maximum time, Torque average, Excursion along Y axis of center of pressure of foot, Excursion along X axis of center of pressure of foot, Length of center of pressure of foot, Average velocity of center of pressure of foot. The data measured by the closed grap starting motion, open grap starting motion and track starting motion were analyzed by one-way repeated ANOVA. The results were as follows ; 1. The Fz max deceleration force time, Fz mid stance force, Fz max acceleration force, Torque maximum and Torque maximum time, Excursion along Y axis of center of pressure of foot, Average velocity of center of pressure of foot were significantly fast and large in the closed grap starting motion then open grap starting motion and track starting motion. 2. The Excursion along Y axis of center of pressure of foot was significantly long in the closed grap starting motion then open grap starting motion and track starting motion.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.14 no.12
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• pp.1092-1101
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• 2002

The objective of this study is to develop energy saving strategies for indoor swimming pools and to estimate the effect of each energy saving strategy. For this purpose, field measurements regarding pool water heating energy, domestic hot water heating energy are conducted and a base energy consumption model is implemented using the DOE-2.1E program. The results of the study reveal that 25% of the total pool water heating energy may be saved by using night time pool covers, 27% of the total domestic hot water heating energy may be saved by using a waste water heat recovery system (effic. 60%), and of the total ventilation energy may be saved using an exhaust air heat recovery system (effic. 60%).