3D프린터로 제작된 PLA재질의 도구와 기성품인 스테인리스 스틸 재질의 도구 사이의 연부조직 가동술에 의한 근활성도 차이

김충유,강종호,태원규,Kim, Chung-Yoo,Kang, Jong-Ho,Tae, Won-Kyu 중소기업융합학회 2020 융합정보논문지 Vol.10 No.11

본 연구는 3D프린터로 제작된 PLA재질의 도구와 기성품인 스테인리스 스틸 재질 도구 사이의 연부조직 가동술에 의한 근활성도 차이를 관찰하고자 수행하였다. 본 연구는 20대 성인 10명이 참석하였고, 모든 대상자는 각각 PLA재질의 도구를 사용하여 연부조직 가동술을 받은 PLA 집단과 스테인리스 스틸 재질의 도구를 사용한 Stainless 집단에 모두 참여하여 도구를 이용한 연부조직 가동술(IASTM)을 받았다. 모든 대상자는 중재 후 근활성도의 측정을 통해 %MVIC가 측정되었고, 이를 Mann-Whitney U검정을 통해 집단간 비교를 통해 검증하였다. 본 연구의 결과는 중재 후 위팔 두갈래근의 %MVIC 값은 두 집단 간 유의한 차이를 보이지 않았다. 따라서 IASTM의 적용에서 도구의 재질에 따라 근활성도의 차이를 보이지 않았고, 이는 3D프린터로 제작된 PLA재질의 IASTM 도구가 스테인리스로 제작된 기성품과 신경근 조절 능력에서 유사한 결과를 도출해 냄으로 보인다. 이에 추후 연구에서는 다양한 환자군을 대상으로 도구의 실효성에 대해 검증할 것이다. This study was conducted to observe the difference in muscle activity by IASTM between a tool made of PLA made with a 3D printer and a tool made of ready-made stainless steel. This study was attended by 10 adults in their twenties, and all subjects participated in both the PLA group and the Stainless group, received IASTM. %MVIC was measured by measuring muscle activity after intervention, and this was verified through comparison between groups through the Mann-Whitney U test. The results of this study showed that there was no significant difference between the two groups in the %MVIC value of the biceps brachii after intervention. Therefore, in the application of IASTM, there was no difference in muscle activity depending on the material of the tool, which seems to be that the IASTM tool made of PLA made with a 3D printer produced similar results in the ability to control neuromuscular muscles and the ready-made product made of stainless steel. Therefore, in a future study, the effectiveness of the tool will be verified for the various patient group.

도구나 수기를 이용한 연부조직 가동술이 근활성도에 미치는 영향

김충유,강종호,Kim, Chung-Yoo,Kang, Jong-Ho 중소기업융합학회 2020 융합정보논문지 Vol.10 No.9

This study investigates the effects of instrument-assisted soft mobilization (IASTM) and manual myofascial release (MFR) on the muscle activity of the biceps brachii. This study was conducted on 10 men and women in their 20s, and all subjects participated in the experiment for 3 days and measured muscle activity of the upper forearm muscles. On the first day, the muscle activity value was measured before the intervention, and the remaining two days were measured for muscle activity after the intervention of each manual therapy in a random order. All muscle activity values were compared and analyzed through the dependent t test and the independent t test. The before and after comparison of muscle activity values before and after each intervention was verified by performing the dependent t test and comparing the values of muscle activity between groups between each intervention after intervention by performing an independent t test. According to the results of this study, both interventions significantly increased muscle activity of the biceps brachii before and after intervention, and there was no significant difference in muscle activity values between groups after intervention. Therefore, both manual therapy (IASTM, MFR) are thought to be effective in improving neuromuscular control ability. 본 연구는 도구를 이용한 연부조직 가동술(IASTM)과 도수 근막이완술(MFR)이 위팔두갈래근의 근활성도에 미치는 영향을 알아보기 위해 수행하였다. 본 연구는 20대 성인 남녀 10명을 대상으로 하였고, 모든 대상자는 3일 동안 실험에 참석하여 위팔갈래근의 근활성도를 측정하였다. 첫 날은 중재 전 근활성도 값을 측정하였고, 남은 이틀은 임의의 순서로 각각의 수기요법을 중재 후 근활성도를 측정하였다. 모든 근활성도 값은 대응t검정과 독립t검정을 통해 비교 분석되었다. 본 연구의 결과에 따르면 두 중재(IASTM, MFR) 모두 중재 전후로 유의하게 위팔두갈래근의 근활성도가 증가하였고, 중재 후 집단간 근활성도 값의 유의한 차이는 없었다. 두 수기요법(IASTM, MFR) 모두 신경근 조절 능력의 증진에 효과적임으로 사료된다.

스쿼트 운동 시 적용된 중주파 전기자극이 안쪽빗넓은근과 가쪽넓은근의 근활성도 및 근활성비에 미치는 영향

김충유 ( Chung-yoo Kim ) 대한통합의학회 2021 대한통합의학회지 Vol.9 No.4

Purpose : The purpose of this study is to investigate the effect of mid frequency electrical stimulation during squat exercise on the muscle activity and muscle activity ratio of vastus medialis oblique and vastus lateralis, and to prepare scientific basic data for exercise intervention using mid frequency electrical stimulation. Methods : This study was conducted with students from University C located in Busan, and among a total of 123 subjects, 12 subjects who complained of knee joint dysfunction between 80 and 90 points using the Kujala patellofemoral score (KPS) were used. All subjects participated in the experiment for 3 days, and MVIC values were measured for normalization of muscle activity values on the first day. For the two days, participants participated in the experiment and performed squat exercise or squat exercise receiving mid-frequency electrical stimulation in random order. Measurements were taken in the squat position immediately after the squat exercise, and muscle activities of vastus medialis oblique and vastus lateralis were measured. The measured data were compared through the dependent t test, and the statistical significance level was set to .05. Results : According to the results of this study, in the case of applying mid-frequency electrical stimulation together in the ratio of vastus medialis oblique and vastus lateralis muscle activity during squat exercise, higher values were observed compared to the case of not applying mid-frequency electrical stimulation together, and statistically significant. Also, when mid-frequency electrical stimulation was applied to both vastus medialis oblique and vastus lateralis activities during the squat exercise, higher values were shown compared to the case where the mid-frequency electrical stimulation was not applied together, but there was no statistically significant difference. Conclusion : The results of this study reported that mid-frequency electrical stimulation provided to vastus medialis oblique increased the muscle activity ratio of vastus medialis oblique and vastus lateralis. Therefore, the improvement of coordination due to the enhancement of the activity of vastus medialis oblique through mid-frequency electrical stimulation will be more helpful in the treatment of patellofemoral pain syndrome patient. In addition, it is hoped that the electrical stimulation method applied to exercise will be widely used.

물리치료사의 초음파 작업시 테이블 높이에 따른 척추기립근의 근전도 활동 분석

김충유 ( Chung Yoo Kim ),강종호 ( Jong Ho Kang ) 대한물리의학회 2013 대한물리의학회지 Vol.8 No.3

PURPOSE: The purpose of this study was to examine differences in erect spinae activities at different height of table during ultrasound therapy in order to propose a optimum work environment. METHODS: Twenty five healthy adult males and females volunteered to participate in this study. EMG signals of both erector spinae(T10, T12, L2, L4) were recorded throught the surface electromyography system at different height of table(45cm, 56.2cm, 67.5cm) during ultrasound therapy work. RESULTS: The higher table heights was, the lower %RVC of the T10, T12, L2, L4 erect spinae at both sides. The left and right T10, T12 and the left L4 showed significant differences. The lower the spinal level was, the higher %RVC of both erect spinae at 45cm, 56.2cm, 67.5cm. The left erect spinae at 56.2cm, right erect spinae at 45cm, 67.5cm showed significant differences. CONCLUSION: The muscle activities of both erect spinae decreased at higher table height and increased lower spinal level. We identified lower table height are risk factor of spine work related musculoskeletal disorders.

가슴우리 확장운동과 교각운동이 노력성 폐활량과 1초간 노력성 날숨량에 미치는 영향

김충유 ( Chung-yoo Kim ),배원식 ( Won-sik Bae ) 대한통합의학회 2021 대한통합의학회지 Vol.9 No.4

Purpose : The purpose of this study was to investigate the effect on lung capacity of healthy men and women in their twenties by performing an intervention using the chest extension exercise and the bridge exercise, which are respiratory muscle strengthening exercises. Methods : Thirty adult men and women in their 20s participated in this study. All subjects participated in the study after hearing the explanation of the purpose and method of the study, filling out a consent form. All subjects were randomly assigned to the chest extension exercise (CEE) group and the bridge exercise (BE) group of fifteen each. Each exercise was performed twice a week for 4 weeks. Lung capacity was measured by forced vital capacity (FVC) and forced expiratory volume in one second (FEV₁) using spirometry. Lung capacity was measured before and after exercise. The measured data were compared through the dependent t-test and the independent t-test. The statistical significance level was set at .05. Results : After the intervention, the CEE group showed a significant increase in FVC and FEV₁ compared to before the intervention (p<.05). After the intervention, the BE group also had a significant increase in FVC and FEV₁ compared to before the intervention (p< .05). However, there was no difference in FVC and FEV₁ between groups before and after the intervention (p >.05). Conclusion : There was no difference between groups in lung capacity after exercise. However, both the chest extension exercise and the bridge exercise increased FVC and FEV₁, which was thought to be because both exercise methods were effective in increasing lung capacity. Therefore, both chest extension exercises and bridge exercises can be effectively applied as a way to increase lung capacity.

경피적전기신경자극 적용 시 적용강도가 성인남성의 위등세모근의 근활성도와 근경도에 미치는 영향

김충유 ( Chung-yoo Kim ),배원식 ( Won-sik Bae ),차영주 ( Young-Joo Cha ) 대한통합의학회 2022 대한통합의학회지 Vol.10 No.1

Purpose : The purpose of this study was to investigate the effect of applying intensity on the muscle activity and muscle hardness of the upper trapezius muscle in adult males when TENS (transcutaneous electrical nerve stimulation) was applied. In addition, this study intends to prepare the scientific basic data of TENS for the purpose of relaxation based on the experimental results. Methods : Eighty-seven healthy adult males participated in the experiment, and they were randomly divided into an experimental group and a control group. All subjects in this study were healthy subjects without musculoskeletal or nervous system damage. All subjects were subjects who voluntarily consented to the purpose and method of the experiment. All subjects were provided with a load by typing for 20 minutes, and muscle activity and muscle hardness of the upper trapezius muscle were measured immediately. Afterwards, TENS was given to each groups for 15 minutes, and the experimental group received stimulation at the motor threshold level, and the control group received a placebo stimulation. After stimulation, muscle activity and muscle hardness of the upper trapezius muscle were measured in the same method. The measured data were compared between groups through an independent t-test and dependent t-test. The statistical significance level was set at .05. Results : The application of TENS statistically significantly decreased the muscle activity and muscle hardness of the trapezius muscle in the experimental group, and the results showed a significant difference from the control group. Conclusion : Application of TENS significantly decreased the muscle activity and muscle stiffness of the upper trapezius muscle. The application of TENS of applying intensity that induces muscle contraction may induce relaxation by reducing the muscle activity and muscle hardness of the trapezius muscle.

물리치료사에 의해서 실시되는 도수수동 운동이 자율신경계에 미치는 영향

김인배 ( In Bae Kim ),김충유 ( Chung Yoo Kim ),김은경 ( Eun Kyung Kim ),신한기 ( Han Ki Shin ),강종호 ( Jong Ho Kang ) 대한물리의학회 2015 대한물리의학회지 Vol.10 No.1

PURPOSE: The purpose of this study was to investigate the effects of ten minutes of manual passive exercise performed by physical therapists on autonomic nervous system. METHODS: Thirty-five healthy adults, both male and female, were chosen as subjects for this study. The autonomic nervous system was measured by heart rate variability (HRV),before and after passive exercise using the following measurements: mean heart rate (mean HRT), low frequency (LF) and high frequency (HF) components, the LF/HF ratio, root mean square of the successive differences (RMSSD), and the HRV index. The exercise was performed on the subjects by a physical therapist with seven years of experience specializing in the nervous system. The exercise was conducted at the mid-range of motion on the upper and lower limbs of the subjects for two minutes and thirty seconds and for a total of ten minutes. RESULTS: There was a significant increase in the LF component. The mean HRT and the LF/HF ratio both increased, but these increases were not significant. The HF component, RMSSD, and HRV index all decreased, but these decreases were not significant. CONCLUSION: In conclusion, mid-range manual passive exercise does not induce stress on the autonomic nervous system. It can safely be performed by a physical therapist.