• Korean Journal of Psychosomatic Medicine
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• v.14 no.1
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• pp.33-38
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• 2006

Biofeedback training to increase the amplitude of respiratory sinus arrhythmia(RSA) maximally increases the amplitude of heart rate variability(HRV) only in respiratory rate at approximately 0.1Hz. To perform this task, people slow their breathing to this rate to point where resonance occur between respiratory sinus arrhythmia(RSA) and oscillation that naturally occur at this rate, probably triggered in part by baroreflex activity. The biofeedback technique allows each individual to breathe at a rate that is specifically adapted to the rhythms of his or her own body. A manual is presented for carrying out this method.

• Journal of Biomedical Engineering Research
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• v.20 no.2
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• pp.191-198
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• 1999

Biofeedback training is one of physiological self control methods for patients who has psychological problem and rehabilitational problem. It has been used to control blood pressure, heart rate, peripheral temperature, respiration, electromyography (ENG), and other biological signals-ENG, respiration, heat rate, peripheral temperature, skin conductance level-was developed in house. We applied this system to alcohol dependent patients to perform biofeedback training. In this experiment, the relaxation biofeedback training for alcohol dependent patient was carried out and the tension state for the change of biological signals were estimated using the fuzzy theory after relaxation biofeenback training. Eight alcohol dependent patients were agreed to participate in this experiment. Result showed that 1) the tension degree of patients were higher than the tension degree of normal subject. 2) The tension degree of patients were decreased as the training numbers were increased.

• The Journal of the Korea Contents Association
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• v.11 no.9
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• pp.469-484
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• 2011

The purpose of this study was to examine the effect of arousal control training conjugated heart rate biofeedback for national substitute three archery players. The arousal control training programs was developed on previous researches and 3 archery experts and 1 sport psychologist had meetings. The training programs contained as orientation, breathing regulation, progressive relaxation technique, heart rate biofeedback, cognitive restructuring, routine and consisted of 24 weeks. XCOACH was utilized as heart rate biofeedback instrument. The effects was examined on competitive state anxiety inventory-2, archery score and ranking, observation, interviews and self assessment. As the results, the score of subfactor was improved on somatic state anxiety, cognitive state anxiety and self-confidence. As the results of observation, interviews and self assessment, the ability of arousal control was enhanced by using effective psychological skills conjugated heart rate biofeedback.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.6 no.2
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• pp.169-184
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• 1999

The purpose of this study was to identify the effects of breathing biofeedback training on the stress of nursing students in clinical practice. The research design was a nonequivalent control group pretest-posttest design. The subjects of this study were 39 nursing students from the College of Nursing of K University. The study was conducted from July 20 to September 3, 1998. The subjects were assigned to one of two groups : the experimental group (19 students), and the control group (20 students). The breathing biofeedback training was performed 12 times with the experimental group. The level of psychological stress was measured using the State Anxiety Inventory, Profile of Mood State, and Visual Analogue Stress Scale. The level of physiological stress was measured using pulse rate and blood pressure. The data were analyzed using descriptive statistics, $x^2-test$, t-test, and repeated measures of ANOVA. The results of study are as follows : 1) State anxiety scores were not significantly different between the experimental group and the control group after the biofeedback training. 2) Profile of mood state scores were not significantly different between the experimental group and the control group after the biofeedback training. 3) Visual Analogue Stress Scale scores were significantly different between the experimental group and the control group after the biofeedback training(F=11.68, p=0.002). 4) Pulse rates were not significantly different between the experimental group and the control group after the biofeedback training. 5) Systolic blood pressures were significantly different between the experimental group and the control group after the biofeedback training(F=5.44, p=0.025). 6) Diastolic blood pressures were not significantly different between the experimental group and the control group after the biofeedback training. On the basis of the above findings, the following recommendations for further study are made ; 1) Identification of the effects of breathing biofeedback training at times of high stress during clinical practice. 2) Identification fo the effects of stress reduction according to the frequency of the breathing biofeedback training.

• The Journal of the Korea Contents Association
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• v.8 no.4
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• pp.237-246
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• 2008

The purpose of this study was to develop relaxation training contents for middle and high school archery players with considering the ecological validity of social, cultural, and sports environment in Korean but also examine the effect of developing relaxation training contents through case study approach and interviews. The relaxation training contents was based on previous researches about relaxation program. In addition, in order to develop the program 3 archery experts and 2 sport psychologists had meetings. The relaxation training contents categorized as orientation, breathing regulation, progressive relaxation training, cognitive restructuring, meditation, heart rate biofeedback training, autogenic training, behavior therapy, self regulation. The experimental group were 6 male Korean national archery substitute players, who were selected in 2007. The effects was examined on competitive state anxiety inventory-2, heart rates, archery score and interviews. As the result of applying the developed program of this study on the field, competitive state anxiety, somatic state anxiety and heart rate were decreased. In the interviews athletes told that they were relaxed psychologically and physically. This result demonstrated the relaxation training program were effective.

• The Journal of the Korea Contents Association
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• v.8 no.6
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• pp.130-139
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• 2008

The purpose of this study was to develop psychological skill training program for actor with considering the ecological validity of social, cultural environment in Korean but also examine the effect of psychological skill training through psychological counseling and field study to decrease stage-anxiety. The experimental group were 2 actors, who were selected by purposive sampling. The psychological skill training program to decrease stage-anxiety for actor was composed of five stages, 12times and categorized as orientation, breathing regulation, progressive relaxation training, group counseling, heart rate bio-feedback training, self concentration, routine training, behavior therapy & self reinforcement, image training. The effects was examined on stage performance anxiety scale, psychological counseling and observation of experts. As the result of applying the psychological skill training to decrease stage-anxiety, cognitive state anxiety, somatic state anxiety were decreased. According to the result of counseling and observation, they were changed affirmative on self confrontation, harmony and rapport between actor and object. This result demonstrated the psychological skill training & counseling to decrease stage-anxiety for actor were effective.

• The Journal of the Korea Contents Association
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• v.12 no.1
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• pp.234-243
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• 2012

The purpose of this study was to develop psychological skill training program for actor with considering the ecological validity of social, cultural environment in Korean but also examine the effect of psychological skill training through psychological counseling and field study to decrease stage-anxiety. The experimental group were 2 actors, who were selected by purposive sampling. The psychological skill training program to decrease stage-anxiety for actor was composed of five stages, 12times and categorized as orientation, breathing regulation, progressive relaxation training, group counseling, heart rate bio-feedback training, self concentration, routine training, behavior therapy & self reinforcement, image training. The effects was examined on stage performance anxiety scale, psychological counseling and observation of experts. As the result of applying the psychological skill training to decrease stage-anxiety, cognitive state anxiety, somatic state anxiety were decreased. According to the result of counseling and observation, they were changed affirmative on self confrontation, harmony and rapport between actor and object. This result demonstrated the psychological skill training & counseling to decrease stage-anxiety for actor were effective.

• Phonetics and Speech Sciences
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• v.15 no.2
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• pp.31-40
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• 2023

Tube phonation in water has been widely used for voice training among semi-occluded vocal tract (SOVT) exercises in which the patient bubbles with phonation keeping the tube submerged in water. This study aims to investigate the effect of tube diameter and water depth on bubble height and maximum phonation time (MPT) for patients with hyperfunctional voice disorders. Seventeen patients with hyperfunctional voice disorders were asked to bubble with sustained /u/ at the different inner diameters of tube (5, 7, and 10 mm), water depth (4, 7, and 10 cm). A water resistance phonation biofeedback system using a water height sensor was used for recording bubble height and MPT. The bubble height was significantly changed by the tube diameter while MPT was significantly changed with the tube diameter and water depth. Although the wider tube presented significantly lower bubble height for a given depth, relatively consistent bubble height was maintained. Depending on the water depth, the bubble height did not significantly differ for a given tube diameter. In addtion, MPT significantly decreased with water depth and a wider tube led significantly shorter MPT. A water level-driven water resistance biofeedback system provided useful information on bubble characteristics and vocal fold vibration depending on tube diameter and water depth. It can be useful to monitor the breath support during water resistance phonation for patients with hyperfunctional voice disorders.