속도변화 보행 훈련이 만성 뇌졸중 환자의 심폐기능에 미치는 영향

서동열(Dong-Yel Seo),양용필(Yong-Pil Yang) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.5

본 연구는 보행 훈련시 심박수의 변화에 따라 보행속도를 조절하여 뇌졸중 환자의 심폐기능의 변화를 알아보고자 하였다. 대상자는 만성 뇌졸중 환자 20명을 무작위로 실험군과 대조군으로 분류하여 연구를 진행하였다. 실험군은 심박수 측정기를 착용한 상태로 트레드밀에서 심박수의 변화에 따라 보행속도를 증가 또는 감소시키면서 보행훈련을 실시하였고, 대조군은 대상자의 주관적인 속도에 의해 보행훈련을 실시하였다. 보행훈련 사이에 10분 간격으로 1분씩 휴식시간을 부여했으며 주 3회씩 총 6주간 중재를 실시하였다. 대상자들의 중재이후의 변화를 살펴보기 위하여 폐활량(VC), 호기예비용적(ERV), 흡기예비용적(IRV) 노력성 폐활량(FVC), 1초간 노력성 호기량(FEV1), 최대 호기 속도(PEF)를 측정하여 심폐기능의 변화를 확인하였다. 연구결과 폐활량, 흡기예비용적, 호기예비용적에서 집단과 시기사이에서 상호작용을 나타내었으며 주효과인 집단 및 시기 간 유의한 차이도 나타났다(p<.05), 1초간 노력성 호기량, 노력성 폐활량, 최대 호기속도에서는 그룹과 시기사이에서 상호작용이 나타나지 않았다. 주 효과에서는 집단 간 유의한 차이를 보이지 않았으나(p>.05) 시기 간에는 유의한 차이를 보였다(p<.05). 연구결과 보행과정에서 심박수의 변화에 따라 속도를 변화시켜 훈련을 시행할 경우 심폐기능의 유의한 향상을 보인 것으로 보아 보행 훈련시 속도변화를 통해 훈련을 할 경우 심폐기능의 유의한 변화를 이끌어 낼 수 있을 것으로 판단된다. This study examined the changes in the cardiopulmonary functions of stroke patients by adjusting the s heart rate during walking training. This study was conducted on 20 chronic stroke patients. The experimental group conducted walking training by varying the walking speed according to the change in heart rate on the treadmill. In contrast, the control group conducted walking training by the subjective speed of the subject. The walking training was conducted for 32 minutes, three times a week, for a total of six weeks. The changes after the intervention of the subjects were determined by measuring the VC, ERV, IRV, FVC, FEV1, and PEF. The study revealed interactions between the groups and timing in the VC, ERV, and IRV(p<.05). There were no interactions between the groups and timing in FEV1, FVC, and PEF. The main effects showed no significant differences between the groups (p>.05) but showed significant differences between periods (p<.05). These results suggest that the cardiopulmonary function was improved significantly when the training was conducted by changing the pace of the heart rate in the walking process, leading to significant changes in the cardiopulmonary function.

Performance Improvement of Rubber Modified Novel Phenolic Resin

장정식,서동열 한국고분자학회 1996 한국고분자학회 학술대회 연구논문 초록집 Vol.1996 No.4

머리척추각의 변화에 따른 목 주변근육의 활성도와 가슴우리 가동성에 미치는 영향

양용필,서동열 한국산학기술학회 2023 한국산학기술학회논문지 Vol.24 No.1

본 연구는 머리척추각의 변화에 따른 목 주변 근육들의 활동 양상과 가슴우리 가동성을 확인하여 앞쪽머리자세가신체 구조와 기능에 미치는 영향을 확인하고자 하였다. 연구 참여자들은 건강한 20대 성인 남녀 50명으로 선정하였다. 대상자들의 머리척추각을 측정하여 기준각도로 설정하고, 기준각도에서 10% 감소한 각도와 20% 감소한 각도에서 각각목빗근과 위등세모근의 근활성도를 측정하였다. 동시에 가슴우리 가동성을 확인하기 위해 최대 들숨시 앞뒤직경과 가로직경을 측정하였다. 연구 결과에서는 머리척추각의 변화에 따라 목빗근과 위등세모근의 근활성도는 모두 각도별 유의한차이를 보였다. 머리척추각의 변화에 따른 가슴우리 가동성에서는 각도의 변화에 따라 앞뒤직경은 유의한 차이를 보였고, 가로직경의 변화에서는 유의한 차이를 보이지 않았다. 따라서, 머리척추각이 감소할수록 목 주변 근육의 과도한 근활성도를 나타내었고, 가슴우리 가동성에서도 앞뒤직경에 제한된 변화가 나타났다. 이는 앞쪽머리자세가 호흡과정에서 목주변 근육들의 과도한 활성으로 인해 가슴우리의 앞뒤직경의 변화만으로 나타내어 제한된 가동성을 보인다고 할 수 있다. 이러한 변화는 호흡기능에 부정적인 영향을 줄 수 있으며 앞쪽머리자세를 보이는 환자들에게 목 주변 근육들의 과도한 활동을 억제하고 가슴우리의 전체적인 움직임을 촉진할 수 있는 훈련방법이 필요할 것으로 사료된다.

Synthesis and characterization of conducting polymer composites based on PEDOT and natural polysaccharides

오송희,은종명,서동열,김동욱,김선주 한국공업화학회 2022 한국공업화학회 연구논문 초록집 Vol.2022 No.1

Effects of Swimming Exercise and Joint Mobilization on HSP 70 Levels in Osteoarthritic Rats

김세훈,남기원,서동열 대한물리치료학회 2014 대한물리치료학회지 Vol.26 No.6

Purpose: This study was performed to investigate the effect of joint mobilization on pain relief and cartilage repair in an inducedosteoarthritis rat model by analyzing the expression of heat shock protein 70 in articular cartilage. Methods: : MIA was injected into SD rats to induce osteoarthritis. These rats were divided into 4 groups: control group (n=30),no further treatment after the MIA injection ; experimental group I(n=30), performed swimming exercise after the MIA injectionexperimental group II (n=30), underwent joint mobilization after the MIA injection and experimental group III (n=30), performedswimming exercise and underwent joint mobilization after the MIA injection. For the histologic and pathophysiologic evaluation,safranin-O staining and for the immunohistochemical evaluation, the expression of HSP 70 in articular cartilage was analyzed 1, 7,14, and 21 days after the MIA injection. Results: The inflammatory response and loss of tissue declined in experimental groups I and II over time, whereas the greatestdecreases were noted in experimental group III. In the articular cartilage, low expression of HSP 70 was observed in every groupon day 1, whereas HSP 70 expression was elevated on days 7 and 14 in experimental groups II and III. After 21 days, experimentalgroup II displayed the strongest positive reaction, whereas HSP 70 was higher in experimental group III at this time pointcompared to that after 14 days. Conclusion: Our results showed that swimming exercise and joint mobilization had positive effects on pain relief and histologicand functional recovery in an induced osteoarthritis rat model.

머리전방자세가 턱관절의 최대 개구량과 관자근 및 깨물근의 근활성도와 비대칭률에 미치는 영향

양용필(Yong-Pil Yang),서동열(Dong-yel Seo) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.3

본 연구는 머리전방자세가 증가함에 따른 턱관절의 최대 개구량, 관자근과 깨물근의 근활성도, 근육의 비대칭률에 미치는 영향을 알아보고자 진행하였다. 연구 참가자들의 머리척추각을 측정하여, 연구의 선정요구를 충족시키는 머리척추각이 50° 이상인 대상자 50명(23.10±2.73세)을 선정하였다. 머리전방자세를 증가시키기 위해 머리척추각을 0%, 10%, 20%를 감소시켜 Control Ⅰ, Control Ⅱ, Control Ⅲ으로 설정하였다. 각 조건에 따른 턱관절의 최대 개구량, 관자근과 깨물근의 근활성도와 비대칭률의 변화를 측정하였다. 연구 결과, 머리척추각의 감소에 따라 최대 개구량은 유의하게 감소하였다(p<.001). 조건 변화에 따른 근활성도 변화를 측정한 결과, 오른쪽 관자근과 깨물근 및 왼쪽 관자근의 근활성도는 감소하였으며(p<.001), 왼쪽 깨물근의 근활성도도 감소하였다(p<.01). 조건 변화에 따른 근육의 좌우 비대칭률을 측정한 결과 좌우 관자근의 비대칭률, 좌우 관자근과 깨물근을 더한 근육의 비대칭률은 증가하였다(p<.01). 본 연구결과는 턱관절 부위에 대한 치료 전략과 종합적 진단을 세우고, 턱관절 장애 치료를 위해 사용된 도수치료와 치료적 운동의 이론적 근거를 제시하는 데 도움이 될 것으로 사료된다. This study examined the effects of the forward head posture on the maximum mouth opening of the jaw joint and the muscle activity and asymmetry of the temporalis and masseter. The craniovertebral angle was measured in 50 subjects (23.10±2.73 years) who met the selection requirements of the study. The maximum mouth opening, muscle activity, and muscle asymmetry were measured by reducing 0%, 10%, and 20%. As the craniovertebral angle decreased, the maximum mouth opening decreased (p<.001), the muscle activity of the right and left temporalis decreased (p<.001), and the muscle activity of the left temporalis also decreased. (p<.01). The asymmetry rate of the added muscles of the left and right temporalis, left and right temporalis, and masseter increased according to the change in condition (p<.01). The results of this study are expected to help establish a treatment strategy and comprehensive diagnosis for the temporomandibular joint and present a theoretical basis of manual therapy and therapeutic exercises used for the treatment of TMD.

12 weeks of combined circuit training improves physical fitness, body composition, and blood lipids in middle aged overweight women

하성(Ha, Sung),서동열(Seo, Dong-Il) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.5

The purpose of this study was to examine the effects circuit training on physical fitness and metabolic indicators in middle aged overweight women. The study group was comprised of 60 overweight middle aged women, with percent (%) body fat over 30. The subjects were randomly divided into two groups: Control group (n=30); training group (n=30). The training group participated in a 12 week of supervised circuit exercise training program. They did 3 days per week for 30 minutes in a day. The control group did not participate in any exercise program. The effects of the interventions on physical fitness, body composition, blood pressure, and blood lipids were analyzed by means of repeated measures ANOVA. All of our variables were improved after the intervention. An interaction effect between time and group on body weight (72.0±9.2 to 67.8±8.2), BMI (27.9±3.0 to 26.5±2.7), % body fat (37.9±4.2 to 34.8±5.0), waist circumference (WC) (88.9±8.0 to 83.1±6.6),, systolic blood pressure (SBP) (126.8±15.3 to 115.4±10.8), diastolic blood pressure (DBP) (75.4±11.6 to 68.1±8.0), Sit up, grip strength of right side hand (GSR), grip strength of left side hand(GRL) TC (194.6±34.0 to 173.3±26.0), TG (115.3±42.4 to 9O.7±32.2), HDL C (45.9±7.2 to 47.9±8.9), and LDL C (107.4±26.3 to 85.9±19.8) was observed (p<0.05). In conclusion, the results of the current study suggest that moderate intensity circuit exercise training program, with 12 weeks of duration, are enough to positively influence the metabolic health indicators of middle aged overweight women.

COVID-19로 인한 마스크 착용이 보행 속도에 따라 심혈관계 기능에 미치는 영향

남기원 ( Ki-Won Nam ),서동열 ( Dong-Yel Seo ) 대한물리의학회 2022 대한물리의학회지 Vol.17 No.4

PURPOSE: To find out how wearing a mask due to COVID-19 affects cardiovascular function as the pace of walking changes. METHODS: Forty-nine college students (27 men, 22 women) were subjected to treadmill exercises without masks (Group Ⅰ) and wearing masks (Group Ⅱ). The body temperature, heart rate, oxygen saturation, and blood pressure were measured to determine the changes in cardiovascular function. These parameters were measured at rest (Control Ⅰ), low-intensity (Control Ⅱ), medium-intensity (Control Ⅲ), and high-intensity (Control Ⅳ) before and after exercise. RESULTS: Significant differences in heart rate were observed between Control Ⅲ and Control Ⅳ, and a significant difference in oxygen saturation was noted in Control Ⅳ. Significant differences in the exercise intensity change in Group Ⅱ were as follows: Body temperature was Control Ⅳ compared to Control Ⅰ and Control Ⅱ, heart rate was Control Ⅲ and Control Ⅳ compared to Control Ⅰ and Control Ⅱ, and Control Ⅳ compared to Control Ⅲ. The heart rate was Control Ⅲ and Control Ⅳ compared to Control Ⅰ and Control Ⅱ, Control Ⅳ for Control Ⅲ, oxygen saturation was Control Ⅳ compared to Control Ⅰ, blood pressure was Control Ⅱ and Control Ⅲ and Control Ⅳ compared to Control Ⅰ, and Control Ⅳ compared to Control Ⅱ. CONCLUSION: Exercising when wearing a mask affects the cardiovascular system. Therapists should consider the patient's condition when setting the exercise intensity. In particular, therapists should be more careful when setting the exercise intensity of patients with cardiovascular disease.

궁둥신경 가동술이 여성노인의 뻗은다리올림 검사와 보행능력에 미치는 영향

남기원 ( Ki-won Nam ),고재청 ( Jae-chung Go ),서동열 ( Dong-yel Seo ) 대한물리의학회 2017 대한물리의학회지 Vol.12 No.4

PURPOSE: The purpose of this study was to examine the effects of sciatic nerve mobilization techniques on straight leg raising (SLR) and walking ability in elderly women aged over 65. METHODS: Seventy women aged over 65 were examined using SLR test and forty women were selected as subjects. They were divided into Group Ⅰ (under 70° of SLR test of both legs, n=20) and Group Ⅱ (over 70° of SLR test of both legs, n=20). Nerve mobilization was applied to both groups (three times a week for 4 weeks). SLR angle was measured using digital goniometer and walking ability was measured by step length, stride length, velocity, double support, using GAITRite System. After 4 weeks, paired t-test was used to compare the changes of SLR test and walking ability within GroupⅠ and Group Ⅱ. RESULTS: In Group I, SLR test, step length, stride length and gait velocity were significantly increased but double support was significantly difference. In Group II, SLR test, step length and stride length were significantly increased but gait velocity was not significantly increased and double support was significantly decreased. CONCLUSION: This study showed that sciatic nerve mobilization techniques had positive effects on the SLR angle and walking ability in elderly women.

만성 목통증에 대한 자가신장과 위등뼈 관절가동술이 머리척추각 및 자율신경계 기능에 미치는 효과

남기원 ( Ki-won Nam ),김세훈 ( Se-hun Kim ),서동열 ( Dong-yel Seo ) 대한물리의학회 2018 대한물리의학회지 Vol.13 No.2

PURPOSE: This study aimed to examine the effects of self-stretching (SS) and joint mobilization (JM) on pain, craniovertebral angle (CVA), autonomic system function in chronic cervical pain patient with forward head posture (FHP). METHODS: A total of 30 male college students were selected as study subjects, and were divided into Group Ⅰ (general physical therapy; GPT, n=10), Group Ⅱ (GPT+SS, n=10), Group Ⅲ (GPT+JM, n=10). All groups were evaluated three times a week for 4 weeks. Pain was measured by visual analogue scale (VAS), CVA was measured using digital goniometer and autonomic system function (heart rate; HR, skin conductivity; SC, LF norm, HF norm, LF/HF ratio) was measured by Biofeedback ProComp Infiniti. After 4 weeks, paired t-test was used to compare the changes within the group and one way ANOVA was used to compare those between the groups. RESULTS: In Group I, VAS was significantly decreased. In Group II and Ⅲ was a significantly change in all items. In comparison between Group I and II was a difference in all items except HR. In comparison between Group I and Ⅲ was a difference in all items. In comparison between Group II and Ⅲ was a difference in VAS, LF norm and LF/HF ratio. CONCLUSION: This study showed that SS and JM can effectively reduce pain and normalize the autonomic system function.