• Physical Therapy Rehabilitation Science
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• 제9권3호
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• pp.201-208
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• 2020

Objective: This study aimed to identify the effects of performing shoulder and hip abduction during the V-sit exercise on abdominal muscle activity. Design: Cross-sectional study. Methods: Thirty healthy adults volunteered for this experiment. The participants randomly performed 6 types of V-sit exercises, including V-sit alone (hip 0°, shoulder 0°), V-sit with hip abduction 0° and shoulder abduction 15°, V-sit with hip abduction 0° and shoulder abduction 30°, V-sit with hip abduction 15° and shoulder abduction 0°, V-sit with shoulder and hip abduction 15°, and V-sit with shoulder abduction 30° and hip abduction 15°. EMG data were recorded from the rectus abdominis (RA), external oblique (EO), and internal oblique (IO) muscles of both sides. All abdominal EMG data during the six types of V-sit exercises were measured for 5 seconds, three times, and recorded for the middle 3 seconds excluding the 1 second at the start and end. Results: V-sit with shoulder abduction 30° resulted in significantly greater muscle activity of both RA, EO compared to shoulder abduction 0°, shoulder abduction 15° (p<0.05) and V-sit with shoulder abduction 15° showed significantly greater muscle activation of the RA compared with shoulder abduction 0° (p<0.05). The muscle activity of both EO and IO in the V-sit with hip abduction 15° was significantly greater than hip abduction 0° in all shoulder conditions (p<0.05). Conclusions: Greater angles of shoulder and hip abduction produced more abdominal muscle activity increases during the V-sit exercises. Shoulder abduction affected the RA, EO muscle activation and hip abduction affected the EO, IO muscle activation. This study showed that shoulder and hip abduction during V-sit exercises enabled effective activation of the trunk muscles.

• 한국전문물리치료학회지
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• 제23권2호
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• pp.67-74
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• 2016

Background: Lumbar stabilization (LS) improve the thickness of the quadratus lumborum (QL) muscle and muscle activity of the gluteus medius (GM) muscle during hip abduction in a side-lying position in patients with low back pain (LBP). Objects: The purpose of this study was to assess the effects of LS on muscle thickness of QL and muscle activity of GM during hip abduction in side-lying in patients with LBP. Methods: The study included 32 patients with LBP, who were randomly divided into the control group and experimental group, each with 16 patients. All subjects performed $35^{\circ}$ preferred hip abduction (control group) and $35^{\circ}$ hip abduction with LS (experimental group) during side-lying. An ultrasonography and a surface electromyography were used to measure the thickness of the QL muscle, and the muscle activities of the GM muscle respectively. Independent t-test was used to compare the muscle thickness of the QL and the muscle activity of the GM muscle, respectively. Results: Anterio-posterior diameter in the muscle thickness of QL muscle was decreased significantly in hip abduction with LS more than in preferred hip abduction (p<.001), but medio-lateral diameter in the muscle thickness of QL muscle was not significantly different between in preferred hip abduction and in hip abduction with LS (p=.06). The muscle activity of GM was increased significantly in hip abduction with LS more than in preferred hip abduction (p<.001). Conclusion: These findings suggest that hip abduction with LS could be recommended as a hip abduction for LS and a prevention unwanted compensatory pelvic lateral tilting movement.

• 한국수학교육학회지시리즈A:수학교육
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• 제59권1호
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• pp.81-99
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• 2020

본 연구는 학생이 만든 수학 문제에 따른 가추 유형과 가추에 동원된 사고 전략에 대해 알아보았다. 중학교 2학년 4명의 학생이 네 개의 과제에 대해 문제 만들기 활동을 하여, 동치문제, 동형문제, 유사문제를 만들었다. 동치문제의 경우 조작적 가추가 주로 발현되었다. 동형문제와 유사문제는 조작적 가추, 이론적 가추, 창의적 가추가 모두 발현되다. 가추에 동원된 사고 전략으로, 조작적 가추는 대상으로 인식하기, 패턴 찾기, 숫자나 그림으로 변환하기, 유추하기, 반대로 생각하기, 결합하기, 제거하기의 사고전략이 나타났다. 이론적 가추에서는 수학적, 경험적, 확산적 지식을 활용하는 사고전략이 나타났다. 창의적 가추에서는 상승화 전략, 형식화 전략, 창조적 전략이 나타났다. 결합하기, 제거하기, 수학적, 경험적, 타교과 지식의 활용, 문제와 직접적 관련이 없는 규칙을 접목시켜 만드는 창조적 전략은 본 연구에서 새롭게 도출된 사고 전략이다.

• 대한통합의학회지
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• 제8권1호
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• pp.169-175
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• 2020

Purpose : This study was performed to comparison of distance change of subacromial space according to shoulder abduction angle in loaded and unloaded conditions. Methods : The subjects were 20 male college students, and the subacromial space was measured using an ultrasound diagnostic apparatus. The participants shoulder abduction was measured during each shoulder resting position and 45 ° abduction with loads of 1 kg, 2 kg, 3 kg. The collected data were analyzed by a paired t-test and repeated measure ANOVA with the SPSS (Ver. 22) program. Results : The subacromial space showed statistically significant decreased in 45 ° abduction than resting position (p<.001). All the subacromial space increased during the according to loads (1 kg, 2 kg, 3 kg) at the resting position but at 45 ° abduction showed statistically significant decreased as the load increases (p<.05). Also, subacromial space showed significant changes in the 2kg, 3kg compared with the 0kg loads. Conclusion : These results identified that shoulder abduction angle and load were related to subacromial space. When resting position, subacromial space is larger at loads than unload. As the load and shoulder abduction angle increase, subacromial space is reduced compared to resting.

• 대한수학교육학회지:수학교육학연구
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• 제25권3호
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• pp.323-345
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• 2015

본 연구는 통계적 추론과 가추법의 관계를 알아보기 위하여 '큰 수의 법칙' 탐구활동에서 나타난 가추법의 유형을 살펴보았다. Peirce의 가추법, Eco의 가추법 유형, Toulmin의 논증패턴을 바탕으로 통계 수업담화를 분석한 결과, 가추법에 해당하는 수업담화에는 과대 코드화된 가추법이 가장 많이 나타났다. 반면에 학생들의 다양한 사고를 유도하는 과소 코드화된 가추법과 새로운 법칙이나 이론을 만드는 창조적 가추법은 낮은 비율로 나타났다. 추론과정에 사용된 계산기는 추상적 확률 개념을 이해하기 위한 경험적 맥락을 통해 학생들이 추론을 중심으로 한 논증과정에 적극적으로 참여하게 하였다. 이러한 연구 결과를 통해 통계 수업에서는 가추법에 대한 이해와 함께 도구를 이용한 통계적 맥락 형성이 중요함을 알 수 있었다.

• The Journal of Korean Physical Therapy
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• 제28권3호
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• pp.205-211
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• 2016

Purpose: This study investigated the influence of muscle activity of the trunk and lower limb during a bridge exercise using a unstable surface and during one-legged bridge hip abduction in healthy adults. Methods: Nineteen healthy participated in this study (12 males and 7 females, aged $29.0{\pm}5.0$). The participants were instructed to perform the bridge exercises under six different conditions. Trunk and lower limb muscle activation, such as the erector spinae (ES), gluteus maximus (GM), external oblique (EO), and internal oblique (IO), was measured using surface electromyography. The six different bridge exercise conditions were conducted randomly. Data analysis was performed by using the mean scores after three trials of each condition. Results: On the ipsilateral side, muscle activity of the IO, EO, and ES during the hip abduction condition (Single-legged hip abduction bridge, Bridge with use of a ball and single-leg hip abduction, Bridge with use of a sling and single-leg hip abduction) was significantly higher than those during Unstable surface (Bridge with use of a ball, Bridge with use of a sling) and General bridging exercise (p<0.05). In the contralateral side, activities of the GM and EO during Single-legged hip abduction bridge, Bridge with use of a ball and single-leg hip abduction and Bridge with use of a sling and single-leg hip abduction was significantly higher than that during Bridge with use of a ball, Bridge with use of a sling and General bridging exercise (p<0.05). Conclusion: This study demonstrated that performing a bridge exercise with use of a sling and single-leg hip abduction had an effect on trunk and gluteal muscle activation. The findings of this study suggest that this training method can be clinically effective for unilateral training and for patients with hemiplegia.

• Physical Therapy Rehabilitation Science
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• 제8권3호
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• pp.162-169
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• 2019

Objective: The purpose of this study was to investigate the conditions for the application of various plank exercises to people who require trunk stabilization by comparing trunk muscle activity according to the degree of hip abduction in the plank exercise. Design: Cross-sectional study. Methods: Twenty healthy participants voluntarily participated in this study and the plank exercise was performed under 5 conditions (two-legged support plank [TSP] with hip abduction, TSP with hip abduction of 15 degrees, TSP with hip abduction of 30, one-legged support plank [OSP] with hip abduction of 15 degrees, OSP with hip abduction of 30 degrees). In order to measure the trunk muscle activity according to the 5 conditions, surface electromyography was used. The electrical activities of the rectus abdominis (RA), external oblique (EO), and internal oblique (IO) muscles were measured during the 5 plank exercises. Subjects practiced each of the 5 conditions three times in random order and the average values were obtained. Results: In the OSP condition with 15/30 degrees of hip abduction, activities of the RA, EO, and IO were significantly greater than during the TSP (p<0.05). In the OSP with 30 degrees of hip abduction condition, activities of the left EO, IO were significantly greater than other plank exercise conditions (p<0.05). Conclusions: The plank exercise with hip abduction of 30 degrees and the OSP exercise can be suggested as an effective method to enhance the activity of the trunk oblique muscles.

• 대한물리의학회지
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• 제11권2호
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• pp.71-76
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• 2016

PURPOSE: The purpose of this study was to compare isometric contraction of deltoid middle fiber between elastic band and light dumbbell on various shoulder abduction angle. And this study intends to examine the compare with isometric contraction on deltoid middle fiber in various abduction angle of shoulder joint. METHODS: The participants of this study were Korean healthy adult in their 20s (n=60). The 8 channel surface electromyography was used to measure activity of the deltoid middle fiber at isomeric contraction on various abduction angle: $0^{\circ}$, $30^{\circ}$, $60^{\circ}$, $90^{\circ}$, $120^{\circ}$ of shoulder joint using elastic band: red color Theraband and dumbbell: 2kg. The data used in the analysis of the present study was the root mean square. RESULTS: The deltoid middle fiber activation was not significantly different between elastic band and dumbbell at each abduction angle. The deltoid middle fiber activation significantly increased as more to increased shoulder abduction angle in elastic band and dumbbell. CONCLUSION: The elastic band and dumbbell was to provide the similarly load to the deltoid middle fiber isometric contraction on all of the shoulder abduction angle. The deltoid middle fiber activation increased as more to increased shoulder abduction angle in elastic band and dumbbell. These results may be an important reference in development of exercise on shoulder joint.

• 한국언론정보학보
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• 제54권
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• pp.76-97
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• 2011

가추법은 문화연구의 방법론으로서 어떤 의미를 지니는가? 이 논문은 문화연구의 방법론 논의가 연구방법이 아닌 인식론적 맥락에서 이루어져야 함을 주장하고, 이를 위해 가추법의 의미를 문화연구의 방법론의 측면에서 재해석한다. 논리학자이자 기호학자인 찰스 샌더스 퍼스는 연역법이나 귀납법으로는 불가능한 새로운 명제나 지식을 발견하기 위해 가추법을 제안한다. 근대의 과학적 실증주의가 객관성과 확실성의 논리에 기대고 있다면, 가추법은 경험된 현상으로부터 새로운 전제를 찾아내는 발견의 논리로서 의미를 지닌다. 이 논문에서는 학문과 지식의 생산 구조와 역사적 맥락을 살펴보고, 그 과정에서 형성된 과학적 연구방법의 신화를 비판한다. 그리고 사회와 문화를 연구하는 방법론적 대안으로서 가추법이 갖는 의의를 살펴보고, 가추법이 문화연구의 방법론에 던져주는 시사점은 무엇인지 논의한다. 이를 통해 문화연구가 방법론으로서 갖추어야 할 세 가지 요소, 즉 '직관'과 '공감'과 '지적 협업'의 중요성과 의미를 탐색한다. 결국 문화연구는 관찰할 수 있는 현재로부터 알 수 없는 실재를 찾아내는 발견의 논리가 되어야 함을 주장한다.

• 국제물리치료학회지
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• 제10권3호
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• pp.1818-1822
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• 2019

Background: Ipsilateral pelvic elevation has been reported as a common compensatory movement during side-lying hip abduction. It has been reported that pelvic elevation inhibits sufficient contraction of gluteus medius. However, few studies have identified the effects of controlled pelvic elevation on the trunk and hip muscles. Objective: To examine the effects of controlled pelvic elevation using visual biofeedback on the muscle activity of the trunk and hip muscles. Design: Crossover study. Methods: Twelve healthy males performed side-lying hip abduction exercises with and without visual biofeedback for pelvic elevation. Electromyography (EMG) activities of the gluteus medius, quadratus lumborum, and multifidus were analyzed using a wireless EMG system while the ipsilateral pelvic elevation angle was measured using a motion sensor during side-lying hip abduction exercises. Results: EMG activities of the gluteus medius (p = .002), quadratus lumborum (p = .022), and multifidus (p = .020) were significantly increased and ipsilateral pelvic elevation was significantly decreased (p = .001) during side-lying hip abduction with visual biofeedback compared to without visual biofeedback. Conclusions: The results of this study suggest that the application of biofeedback for pelvic motion could improve the trunk and hip muscle activation pattern and decrease compensatory pelvic motion during side-lying hip abduction exercise.