• Journal of Nutrition and Health
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• v.27 no.2
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• pp.162-171
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• 1994

The purpose of this study was to describe the effects of caffeine ingestion on the metabolic responses during submaximal exercise. Ten male of rowing player aged 18-22yrs. participated in the study. No subjects had any remarkable medical history and none were taking medications. According to the administration of dehydrated caffeine(CA) (6mg/kg) or placebo(PA), they were classified into two groups such as caffeine group and placebo group. A randomized, double-blind, crossover protocol was employed using either CA or PA. Subjects underwent a submaximal bicycle ergometer. Blood was drawn intravenously prior to 60 min., at rest, at 30, and 45 min. of exercise, and recovery period. Plasma concentrations of glucose, free fatty acid and lactate were obtained using enzymatic method. Followings were obtained by the tests and analyses; 1) Blood glucose(BG) of 45 minute of exercise was significantly decreased in CA group of 76.3$\pm$14.8 mg/100ml compared with PA group of 94.9$\pm$11.2 mg/100mg(p<0.5). 2) Free fatty acid(FFA) of 30minute of exercise was significantly increased in CA group of 720$\pm$80 $\mu$Eq/1 compared with PA group of 360$\pm$120 $\mu$Eq/1(p<0.5). After exercise, FFA was significantly higher in CA group than those in PA group(p<0.1). 3) Blood lactate(BL) was not significantly different between the two. After exercise, BL was significantly different in 30 minute(p<05).

• Korean Journal of Exercise Nutrition
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• v.24 no.1
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• pp.1-8
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• 2020

[Purpose] This study compared differences in trabecular bone architecture and strength caused by jump and running exercises in rats. [Methods] Ten-week-old male Wistar rats (n=45) were randomly assigned to three body weight-matched groups: a sedentary control group (CON, n=15); a treadmill running group (RUN, n=15); and a jump exercise group (JUM, n=15). Treadmill running was performed at 25 m/min without inclination, 1 h/day, 5 days/week for 8 weeks. The jump exercise protocol comprised 10 jumps/day, 5 days/week for 8 weeks, with a jump height of 40 cm. We used microcomputed tomography to assess microarchitecture, mineralization density, and fracture load as predicted by finite element analysis (FEA) at the distal femoral metaphysis. [Results] Both jump and running exercises produced significantly higher trabecular bone mass, thickness, number, and fracture load compared to the sedentary control group. The jump and running exercises, however, showed different results in terms of the structural characteristics of trabecular bone. Jump exercises enhanced trabecular bone mass by thickening the trabeculae, while running exercises did so by increasing the trabecular number. FEA-estimated fracture load did not differ significantly between the exercise groups. [Conclusion] This study elucidated the differential effects of jump and running exercise on trabecular bone architecture in rats. The different structural changes in the trabecular bone, however, had no significant impact on trabecular bone strength.

• Journal of muscle and joint health
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• v.20 no.1
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• pp.31-42
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• 2013

Purpose: The purpose of this study was to develop an evidence-based dysphagia nursing care protocol for nursing home (NH) residents in Korea. Methods: The protocol was developed based on international guidelines and literatures. After testing content validity by experts, the protocol was applied to the intervention group (n=35) for 4 weeks at one NH in December, 2011, whereas the control group (n=34) received routine care. Results: The protocol was composed of one-page algorithm and detailed guidelines. Algorithm pathway was organized in 3 parts, including screening dysphagia risk, grouping by dysphagia risk level, and assigning nursing care into each group. The nursing care included positioning, oral care, meal time care, diet modification, providing exercise and maneuver, and checking dysphagia signs and symptoms. The experts verified the content validity. Protocol was revised to fit NH practice after the participant observation. Clinical validity was established upon evaluating usefulness, appropriateness, and convenience of the protocol by NH nurses. Dysphagia risk of the intervention group was significantly decreased. Conclusion: Developed protocol will improve the quality of dysphagia care in nursing homes as it can serve as a consistent and integrated standard for nursing care of residents with dysphagia.

• Journal of Biomedical Engineering Research
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• v.10 no.3
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• pp.279-284
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• 1989

Measurement of cardiac output during exercise by noninvasive technique is very needed in the area of sports medicine. However there are only two noninvasive techniques, one of which is $CO_2$ subscript rebreathing technique and the other one is impedance cardiography. While $CO_2$ rebreathing technique needs special breathing and metablic steady state, impedance cardiography has motion Uiiau problem. In this study maior sources of the mothion artifact during treadmill exercise was found experimentally to. be the impact caused by each step on the treadmill. Thus special shoes to reduce the impact were developed. These are the shoes with silicon rubber and hard sponge attached to the soles. It was possible to measure cardiac output with the newly developed shoes for Burke protocol whose speed of the treadmill was constant 3.5 miles/hour while it was impossibel with the conventional exercise shoes.

• Proceedings of the KOSOMBE Conference
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• v.1997 no.05
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• pp.179-183
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• 1997

The objective of this study was to develop an FES exercise protocol that can enhance muscle force and fatigue resistance and to evaluate the resulting effects. We investigated contraction and fatigue properties of vasti of 10 normal subjects and 4 paraplegics by applying different types of electrical stimulation. Based on the results, we have been training quadriceps of a male paraplegic patient. The results suggested that the exercise be applied 7 days a week, and confirmed that low frequency and intermittent stimulation delays fatigue. After the two-year FES exercise, the patient's knee extensor torque increased by about ten folds and the fatigue index decreased to half of the preFES value.

• Journal of Life Science
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• v.21 no.1
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• pp.9-14
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• 2011

Perceived exertion involves detection and interpretation of sensations arising from the body during physical exercise. Physiological variables such as heart rate and oxygen consumption positively correlate with ratings of perceived exertion (RPE). It is unknown whether the accuracy of predicting exercise intensity from RPE differs between men and women. Therefore, it was examined whether men or women could predict relative exercise intensity, determined by oxygen consumption, more accurately from RPE. Ten male and ten female young adult subjects aged 25.1${\pm}$3.52 yr volunteered to participate. RPE were determined by the Borg 15-category scale, and a standard Bruce treadmill protocol was used to perform graded exercise testing. There was no significant difference in slope means between males and females (p=0.501). No significant difference was observed when plotting rates of perceived exertion (RPE) vs. percentage of $VO_2$ max. The relative maximal oxygen consumptions ($VO_{2max,\;}_{rel}$) were 52.36${\pm}$7.35 ml/kg/min for males and 41.44${\pm}$6.71 ml/kg/min for females, respectively and there was a significantly high difference between the two groups in the relative $VO_{2max}$, as well as figures of 4.05${\pm}$0.36 l/min for males and 2.53${\pm}$0.39 l/min for females in the absolute $VO_{2max}$ in this study. There were no significant differences in slope, y-intercept, and standard error of estimate (SEE) between males and females. No significant difference with RPE according to exercise intensity was found between males and females. However, RPE was a useful predictor of exercise intensity in independent genders.

• Journal of Life Science
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• v.19 no.12
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• pp.1712-1717
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• 2009

The purpose of this study was to compare $VO_2$max, maximal power output, and presence of $VO_2$ plateau across 4 protocol durations (5, 8, 12, and 16 min) during incremental cycling exercise to $VO_2$max. Twenty moderately to highly trained subjects ($24.9{\pm}6.6$) participated in the study. The mean $VO_2$max in the 5-min ($3.55{\pm}0.80\;l/min$) and 8-min ($3.66{\pm}0.88\;l/min$) duration protocols had higher and significantly higher mean value in the 8-min duration protocol compared to the 12-min ($3.49{\pm}0.76\;l/min$) and 16-min ($3.45{\pm}0.73\;l/min$) duration protocols. The AMPO across four protocols showed a significant difference. The AMPO for the 5-min protocol was 12%, 24%, and 35% higher than AMPO for the 8-min, 12-min and 16-min protocols. The presence of plateau was 12.5% for the 5 min protocol, 56.25% for the 8 min protocol, 37.5% for the 12 min protocol, and 56.25% for the 16 min protocol. This study indicates that the short duration protocol (<8 min) is a more valid measurement for $VO_2$ max than optimal duration protocol (8-12 min) in moderate to highly trained individuals on the cycle ergometer.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.1481-1482
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• 2013

• The Korean Journal of Pain
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• v.30 no.4
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• pp.258-264
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• 2017

Background: Pulpal pain is one of the most common and severe orofacial pain conditions with considerable adverse effects on physiological processes including learning and memory. Regular exercise is known to be effective on cognitive function as well as pain processing in the central nervous system. Here, the possible effects of regular exercise on pulpal pain response as well as pain-induced changes in learning and memory efficiency in rats were investigated. Methods: Twenty-four male Wistar rats were randomly assigned to the control, capsaicin, exercise, and exercise plus capsaicin groups. Rats in exercise groups were forced to run on a treadmill with a moderate exercise protocol for 4 weeks. Capsaicin was used to induce dental pulp pain. Passive avoidance learning and memory performance was assessed by using a shuttle box apparatus. Results: According to the results, regular exercise could decrease the time course of capsaicin-induced pulpal pain (P < 0.001). Moreover, in capsaicin-treated rats, passive avoidance acquisition was impaired as compared to the control (P < 0.05) and exercise (P < 0.001) groups. Additionally, regular exercise before capsaicin injection could attenuate capsaicin-induced memory impairments (P < 0.05). Conclusions: Taken together, the present data showed that regular exercise has inhibitory effects on capsaicin-induced pulpal pain as well as pain-induced cognitive dysfunction in rats.

• Journal of Nutrition and Health
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• v.37 no.5
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• pp.364-372
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• 2004

The purpose of this study was to investigate the possibility of medicinal plants application as an edible functional food resource. We carried out to develop a traditional functional beverage by using hot-water extraction of 4 medicinal plants (Polygonatun sibiricum, Ophiopogonis radix, Lycii fructus, Schizandriae frutcus) and we examined the effects of drink on physiological response during exercise and recovery phase. The subjects were male baseball players, and exercise protocol was performed with 45 minutes treadmill running and 85％ VO$_2$ max intensity. Brix, pH and titratable acidity of developed drink were 9.5％, 3.3 and 0.22％. The approximate nutritional composition of beverage was carbohydrate, 5.98％, total dietary fiber, 0.42％, crude protein, 0.70％, crude fat, 0.20％ and crude ash, 0.20％. Developed. traditional functional beverage contained K (4.00 mg％), Na (3.68mg％), Ca (2.54mg％), Mg (1.60mg％) and Fe (0.29mg％). Developed beverage drinking group showed a lowest heart rate during exercise and recovery phase than the other two group (water group and ion beverage group). In the change of blood lactate concentration, developed beverage intake group showed a significant lowest values during exercise and recovery phase. And blood hematocrit values and osmolarity were lowest in the developed beverage intake group. In these results, exercise performance capacity was expected to improve most highly with the developed drink from composition with medicinal plants. Also developed beverage was effective in recovery of exercise-induced fatigue. Thus developed drink with medicinal plants can be used as a functional material improving decrease fatigue effects in beverage industry.