• Physical Therapy Korea
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• v.13 no.4
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• pp.10-15
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• 2006

This study examined the ability of human subjects to match a force in their quadriceps muscle during fatigue. Twenty subjects (mean age: 23.4 yrs, mean height: 167.8 cm, mean weight, 62.6 kg) were enrolled in the experiment. In the force-matching task, the quadriceps muscle generated 50% of the MVIC (maximum voluntary isometric contraction) torque under visual control and then without visual feedback. After inducing fatigue in the quadriceps muscle, the subjects were required to match 50% of the MVIC torque without visual feedback. The perceived magnitude of the force and force-matching errors were measured. 50% of the MVIC torque was perceived from 39.96 Nm in the pre-fatigue condition to 44.95 Nm in the post-fatigue condition. 50% of the MVIC torque-matching errors increased significantly from .55% in the pre-fatigue condition to 9.6% in the post-fatigue condition (p<.001). in addition, there were significantly more force-matching errors in women than in men (p<.01). In conclusion muscle fatigue can interfere with a subject's ability to match a force. This suggests that muscle fatigue may contributes to the sensitization of the proprioception.

• Physical Therapy Korea
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• v.4 no.3
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• pp.1-16
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• 1997

This study was carried out to find out general characteristics and health-related be haviors of elders aged 60 or over and factors related to their activities of daily living, and thus to contribute to their health maintenance and promotion. The subjects were 200 elders who had resided at An-Dong city and participated in this study. To collect data, the field survey was conducted from December 13 to 23, 1996 with structured questionnaires by 6 trained student interviewers. Chi-square test, t-test and Pearson's correlation were used for data analysis by use of SPSS/$PC^+$ program. The major findings were as follows; 1) In the individual characteristics of the respondents, the average age were 73.6 years old. 21.5% of the subjects were 60-69 years old, while 27.5% were 70-74 years old, 25.0% were 75-79 years old, 26.0% were 80 years old or over. 2) For the degree of the subject's perceptive health condition, the aver age 3.39 point and standard deviation 1.09. The perceptive health condition of the subjects was in the mid point range of health condition. 3) 46.6% of men and 25.8% of women practiced exercise regularly for their health maintenance and promotion. 4) For the degree of the subject's perceptive health condition, the difference by sex was not statistically significant. 5) 51.8% of men and 60.2% of women has idea for interventions to health promotion program by rehabilitation services.

• The Journal of Korean Physical Therapy
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• v.28 no.3
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• pp.195-200
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• 2016

Purpose: This study was designed to evaluate the effects of the different condition of leg support surface on the upper extremity and core muscle activity during the push-up exercise. Methods: Fifteen healthy subjects that were practicable push-ups were recruited in this study. Subjects were instructed the push-up exercise in the different condition of the leg support surface. Each condition of support surface was set to the high and lower, and the unstable and stable condition. Muscle activation was measured by using the surface electromyography (EMG), and recorded from the triceps brachii, serratus anterior, latissimus dorsi, rectus abdominis, abdominal external oblique, and erector spinea muscle. Results: In the results of experiments, there was no significant difference of muscle activation in upper extremity between the high unstable and high stable support surface. By contrast, muscle activation of the rectus abdominis and abdominal external oblique was significantly higher in the low unstable support surface, compared with those of the low stable support surface. It is well known that the core muscle was important to stabilization of trunk stability. Conclusion: This result demonstrates that the low and unstable support surface for the lower extremity was suited for training of core muscle for trunk stabilization during the push-up exercise.

• Journal of Korean Physical Therapy Science
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• v.7 no.1
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• pp.285-294
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• 2000

80 persons who don't have past history of cardiopulmonary and neuromuscular disease. The results were as follow; 1. PCI(Physiological Cost Index) value without loading to ankle were significantly increased compared to 1kg, and 2kg (p<0.01). 2. Female Subjects showed more increased PCI value in without loading and lkg, 2kg loading compared to male subjects (p<0.01). 3. In every PCI condition the difference among height groups was observed (p<0.01). 4. The difference among weight groups in each PCI condition was observed (p<0.01). These results showed that energy consumption was increased according to loading on the ankle during gait so weight of orthosis or prosthesis must be considered when choosing them and during gait training with these ones.

• The Journal of Korean Physical Therapy
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• v.14 no.3
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• pp.297-307
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• 2002

We have isolated a sesquiterpene lactone, cumambrin A from the dried flowers of Chrysanthemum boreale Makino and reported its chemical structure. The aim of the present study was to investigate whether the exogenous administration of cumambrin A has a pharmacological effect on normalization of blood pressure in the spontaneously hypertensive rats (SHR). In vitro studies: Relaxative response induced by cumambrin A was increased with dose-dependent manner and showed maximizing response at a concentration of 5?0-4 M. Further, this relaxative response was significantly increased at a condition of endothelium present than that of endothelium denuded. in vivo studies: The normalizing effect of cumambrin A on blood pressure was also increased with time-dependent manner and then gradually recovered to normal condition at approximately 4 hrs after cumambrin A treatment.

• The Journal of Korean Physical Therapy
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• v.10 no.1
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• pp.223-227
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• 1998

The purpose of this study was to determine of the present conditions and course of Korea physical therapy. As reviewing the curriculums for physical therapy education, the system for physical therapist licence issue. and working condition of physical therapist have been suggested a strategy far specialization of physical therapist and course of Korea physical therapy. Based on the research results, the following considerations and guidelines are presented. 1. Need to specialization of curriculum for physical therapy education. 2. For increase quality of treatment, decrease the number of patient per daily treatment by a physical therapist. 3. Specialization of physical therapist role at department of physical therapy, university hospital and general hospital. 4. Establishing physical therapy residency program at university hospital and general hospital. 5. Preparing the law for independent clime open of physical therapist.

• Physical Therapy Korea
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• v.16 no.3
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• pp.42-49
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• 2009

This study examined the vastus medialis oblique (VMO) and the vastus lateralis (VL) onset time differences (OTD) during quadriceps contraction in different hip positions. Twelve healthy subjects were recruited (four men, eight women). Surface EMG activities of the VMO and VL were measured during a quadriceps strengthening exercise in a long sitting condition and in a sitting at a chair with feet hanging condition. For each condition, subjects were tested in two hip positions (neutral and adduction). The OTD between the two muscles was calculated for each condition, by subtracting the onset time of the VL from the VMO. Therefore, the negative value of OTD represent earlier EMG onset of the VMO compared to the VL. The OTD was not significantly different between the hip neutral and the hip adduction position in the long sitting condition (p=.064). However, the OTD was significantly different between the hip neutral position ($15.83{\pm}109.51$ ms) and hip adduction position ($-5.58{\pm}121.08$ ms) during the sitting at a chair with feet hanging condition (p=.047). The negative OTD value in the hip adduction condition during quadriceps strengthening exercises is the result of earlier onset of the VMO than VL. Therefore, quadriceps contraction in the hip adduction position can prevent the risk of patella lateral tracking. We expect that quadriceps strengthening exercise in the hip adduction position will be a safe way to prevent patellofemoral pain syndrome resulting from abnormal patella lateral tracking.

• Journal of Society of Preventive Korean Medicine
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• v.12 no.1
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• pp.149-156
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• 2008

In the situation providing the aged society, the contents of the symptoms of senility centering around the aged-pulse condition were arranged. The results were as follows. In the questions about the aged symptoms, the results of indicating the gradual physical-age following the aged symptoms with the real age(from 40 to 100, 7 grade) and the gradual physical-age following the ageing grade of male and female (the 3 grade of the female / the 4 grade of the male) could have the differentiations. And the distinction of the aged pulse condition was observed two pulse condition ; the one is the minute pulse condition(Mi, Sei ;微細) as lowering function and the other is the Hyun, Ghin(弦, 緊) pulse condition as the blood's tention and contration.

• Journal of International Academy of Physical Therapy Research
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• v.9 no.3
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• pp.1549-1557
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• 2018

This study examined the effects of group exercise program on health conditions and quality of life in cerebral palsy. Adults with cerebral palsy in their 20's who participated in the evaluation of measurement tools prior to and following the experiment. The control group was engaged in manual exercise for the range of joint movement and extension exercise for arms, legs and trunk, and experimental group performed group exercise program including boccia exercise. The health condition and quality of life of the experimental group were significantly increased after intervention (.05<). There was a slight increase in the control group, however it was not statistically significant. As a result of comparing the health condition and quality of life of the two groups, the value of the experimental group was significantly higher than that of the control group. The results of this study suggest that exercise programs for patients with cerebral palsy in the twenties are considered as beneficial interventions to improve health conditions and quality of life.

• Korean Journal of Health Education and Promotion
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• v.33 no.2
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• pp.27-37
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• 2016

Objectives: This study investigated the relationship between adolescents' suicidal ideation and their physical health conditions to contribute to lower suicide rates among adolescents. Methods: Secondary analysis of 2108 high school students of $10^{th}$ grade was conducted using the Korean Child and Youth Panel survey in 2013. The association between suicidal ideation and socio-demographic and health characteristics were analyzed using Chi-square tests and regression models. Results: Adolescents' physical health conditions were significantly related to suicidal ideation. In particular, rhinitis and various symptoms such as feeling feverish, low appetite, feeling of nausea, stomachache while studying, and sleeping problem showed statistically significant relationships with suicidal ideation (P < .05). Furthermore, the higher frequency of diseases and body symptoms increases the rate of suicidal ideation. Considering socio-economic characteristics, family structure was also important. Conclusions: Physical health condition is a major contributor to adolescent's suicidal ideation. results suggest that improving social support system for adolescents' physical health conditions across family and school may be important in suicide prevention efforts.