• Title/Summary/Keyword: Self Stretching

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Immediate effects of neuromuscular control exercise on neck pain, range of motion, and proprioception in persons with neck pain

  • Lee, Jae-Doo;Shin, Won-Seob
    • Physical Therapy Rehabilitation Science
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    • v.9 no.1
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    • pp.1-9
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    • 2020
  • Objective: This study aimed to investigate the immediate effects of intervention using neuromuscular control, self-stretching (SS), and neck stabilization exercises (NSEs) on neck pain, range of motion (ROM), and proprioception of position sense in adults with neck discomfort. Design: Three-group pretest-posttest design. Methods: Forty-four adults who complained of neck pain participated in the experiment. They were randomly assigned to the following groups: neuromuscular control exercise (NMCE) group (n=15), SS group (n=14) and NSE group (n=15). The NMCE group did rolling with only upper limb pattern on both sides. The SS group performed neck stretching on each side, 3 sets of 30 seconds for each muscle. The NSE group had the pressure biofeedback applied with increases in pressure by 2 mmHg at a time from 20-30 mmHg while in the hook-lying position. All groups performed exercises for 10 minutes. Neck pain, ROM, and proprioception were measured to determine differences between the intervention methods. Results: Intra-group comparisons showed significant improvement after exercise in pain, ROM, and proprioception in the NMC group (p<0.05). In the comparison between groups, the NMC group had a significant decrease in pain compared to the other two groups (p<0.05). There was no difference in ROM between the groups but the NMC group showed significant improvement in left rotation compared to the stabilization exercise group (p<0.05). For proprioception, the NMC group had significantly lower error than the other two groups (p<0.05). Conclusions: NMCEs through upper extremity pattern rolling exercise is effective in improving neck pain, ROM, and proprioception.

Analytical Study for the Prediction of Mechanical Properties of a Fiber Metal Laminate Considering Residual Stress (잔류응력을 고려한 섬유 금속 적층판의 기계적 물성치 예측에 관한 이론적 연구)

  • Kang, D.S.;Lee, B.E.;Park, E.T.;Kim, J.;Kang, B.S.;Song, W.J.
    • Transactions of Materials Processing
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    • v.23 no.5
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    • pp.289-296
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    • 2014
  • Uniaxial tensile tests were conducted to accurately evaluate the in-plane mechanical properties of fiber metal laminates (FMLs). The FMLs in the current study are comprised of a layer of self-reinforced polypropylene (SRPP) sandwiched between two layers of aluminum alloy 5052-H34. The nonlinear tensile behavior of the FMLs under in-plane loading conditions was investigated using both numerical simulations and a theoretical analysis. The numerical simulation was based on finite element modeling using the ABAQUS/Explicit code and the theoretical constitutive model was based on the volume fraction approach using the rule of mixture and a modification of the classical lamination theory, which incorporates the elastic-plastic behavior of the aluminum alloy and the SRPP. The simulations and the model are used to predict the inplane mechanical properties such as stress-strain response and deformation behavior of the FMLs. In addition, a post-stretching process is used to reduce the thermal residual stresses before uniaxial tensile testing of the FMLs. Through comparison of both the numerical simulations and the theoretical analysis with the experimental results, it is concluded that the numerical simulation model and the theoretical approach can describe with sufficient accuracy the actual tensile stress-strain behavior of the FMLs.

Effects of Hamstring HR Technique on Knee Joint Angle Increase (넙다리뒤근육의 유지-이완기법이 무릎관절 각도 증가에 미치는 효과)

  • Jeong, Eun-ho;Kim, Chi-hyok
    • The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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    • v.24 no.2
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    • pp.75-81
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    • 2018
  • Background: The purpose of this study was to investigate the effect of various relaxation techniques on various dysfunction problems caused by shortening of the sagittal muscles. Method: The subjects were 44(18 males, 26 females). The subjects were composed of 3 groups. The experimental group consisted of 14 patients with proprioceptive neuromuscular facilitation stretching (PNF) technique, control group A 15 patients with self myofacial release (SMR) ball exercise, and control group B with 15 patients with Sling exercise. After 3 weeks of relaxation on the hamstring muscle, the length of the hamstring muscle before and after the intervention was compared. Results: The results of relaxation exercise of the snake muscles applied to passive PNF group, SMR ball group, and Sling relaxation group are as follows. 1. In the passive PNF group, the muscle length of the hamstring muscle was significantly increased after the intervention. 2. The muscle length of the hamstring muscle was significantly increased after the intervention in the SMR ball group. 3. Sling relaxation group significantly increased the muscle length of the hamstring muscle after sling exercise intervention. 4. Passive PNF group showed the greatest change in muscle length before and after intervention than SMR ball group and Sling relaxation group. Conclusion: Passive PNF relaxation therapy, SMR ball relaxation therapy, and Sling relaxation therapy applied to the hamstring muscle were effective in increasing muscle length of the hamstring muscle. PNF relaxation therapy showed the most significant effect after 3 weeks intervention.

Study of Clinic application of Myofascial Pain Syndrome with Acupucture and Trigger Point (경혈점과 유발점에 의한 근막통증후군의 임상적용에 대한 연구)

  • Chang, Moon-Kyung
    • Journal of Korean Physical Therapy Science
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    • v.2 no.3
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    • pp.727-738
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    • 1995
  • Myofascial pain syndrome is one of the major cause of chronic pain and trigger point injection, stretching, spray and electrical therapy are often used in clinical situation for treatment of myofascial pain syndrome. Myofascial pain syndrome is characterzied by the existence of a hypersensitive region, called the trigger point in a muscle or in the connective tissue, together with palpable noble, stiffness, limitation of motion and referred pain when trigger point is stimulated. Physiologically, they represent a self-sustaining vicious cycle of pain-spasm-pain. The purpose of this study is to illustrate mechanisms of pain by stimulation of acupuncture and trigger point, to introduce clinic application of orient and western stimulative point (acupuncture, trigger point)for treatment of MPS(myofascial pain syndrome), to make physiotherapist use both stimulative points for treatment of MPS.

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Meta-analysis on the Effects of Exercise Therapy and Physiotherapy on Pain in Korean Patients with Chronic Low Back Pain (만성요통환자를 대상으로 운동치료 및 물리치료가 통증에 미치는 효과에 대한 메타분석)

  • Kim, Sung-Kyu;Lim, Bee-Oh
    • Korean Journal of Applied Biomechanics
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    • v.30 no.1
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    • pp.63-72
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    • 2020
  • Objective: The purpose of this study was to investigate meta-analysis on the effects of exercise therapy and physiotherapy on pain in korean patients with chronic low back pain. Method: Meta-analysis was performed on the type and method of treatment. A total of 23 experimental studies were coding into 31 individual studies, into types, methods, visual analogue scale (VAS), each pre/post value of the effect size was calculated by meta-analysis. Results: Sling exercise, stretching, thermal therapy, kinesio-taping, lumbar stabilization exercise, electrotherapy is large effect size (ES ≥ .08). In addition, big effects occurred in order of treatment period is more than 9 weeks, three times a week. Conclusion: Our results indicated that persistent treatment of chronic back pain is the most effective method of self-sufficiency rather than temporary relief.

Formation of Coherent Vortices in Late Wake Downstream of an Object in Weakly Stratified Fluid (약한 밀도 층상류에서 발생하는 물체 후류의 잔류와 응집 와류의 형성)

  • Lee, Sung-Su;Kim, Hak-Sun
    • Journal of the Society of Naval Architects of Korea
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    • v.48 no.5
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    • pp.414-420
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    • 2011
  • Decades of studies of geophysical flow have unveiled that the flow downstream of obstacles in stratified flow consists of attached wake and strong gravity waves, or separated, fluctuating wake and persistent late wakes. Among unique and interesting characteristics of the stratified flow past obstacles is the generation of coherent vortex in the late wake far downstream of the object. Unlike in homogeneous fluid, the flow field downstream self-develops coherent vortex even after diminishing of the near wake, no matter how small the stratification is. This paper present a computational approach to simulate the generation of the coherent vortex structure in the late wake of a moving sphere submerged in weakly stratified fluid. The results are in consistent with several experimental observations and the vortex stretching mechanism is employed to explain the process of coherence.

Features of Microphase-Separated Structures in Asymmetric Triblock Copolymers $A_{1}-B-A_{2}$

  • Yamamoto, Katsuhiro;Tanida, Kenichi;Shimada, Shigetaka;Fukuhara, Junji;Sakurai, Shinichi
    • Proceedings of the Polymer Society of Korea Conference
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    • 2006.10a
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    • pp.338-338
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    • 2006
  • Equilibrium behavior of ABA triblock copolymer with different lengths of endblock A chains was examined using self-consistent field theory by Matsenl. It was found that at small asymmetries, the A block bidispersity reduces the stretching energy of the A domains. This effect causes a slight increase in the domain spacing and shifts the order-order transitions toward higher A volume fractions. At large asymmetries, the short A blocks pull free of their domains allowing their B blocks to relax. A feature of microphase-separated structure of asymmetric poly(methyl acyrylate) (PMA)-b-polystyrene-b-PMA using SAXS, DSC and ESR was experimentally examined. These measurements gave an evidence of the solubilization of short A chains to the B domains.

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Morphological Detection of Carotid Intima-Media Region for Fully Automated Thickness Measurement by Ultrasonogram

  • Park, Hyun Jun;Kim, Kwang Baek
    • Journal of information and communication convergence engineering
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    • v.15 no.4
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    • pp.250-255
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    • 2017
  • In this paper, we propose a method of detecting the region for measuring intima-media thickness (IMT). The existing methods for IMT measurement are automatic, but the region used for measuring IMT is not detected automatically but often set by the user. Therefore, research on detecting the intima-media region is needed for fully automated IMT measurement. The proposed method uses a morphological feature of the carotid artery visible as two long high-brightness horizontal lines at the upper and lower parts. It uses Gaussian blurring, ends-in search stretching, color quantization using a color-importance-based self-organizing map, and morphological operations to emphasize and to detect the morphological feature. The experimental results for evaluating the performance of the proposed method showed a 97.25% (106/109) success rate. Therefore, the proposed method can be used to develop a fully automated IMT measurement system.

Numerical Study of Coherent Vortex in Late Wake Downstream of a Sphere in Weakly Stratified Fluid (잔류내 응집 와류의 수치 해석)

  • Lee, Sung-Su;Lee, Young-Kyu;Yang, Kyung-Soo
    • Proceedings of the KSME Conference
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    • 2003.04a
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    • pp.1863-1868
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    • 2003
  • Decades of studies of geophysical flow have unveiled that the flow downstream of obstacles in stratified flow consists of attached wake and strong internal waves, or separated, fluctuating wake and persistent late wakes. Among unique and interesting characteristics of the stratified flow past obstacles is the generation of coherent vortex the late wake far downstream of the object. Unlike in homogeneous fluid, the flow field downstream self-develops coherent vortex even after diminishing of the near wake, no matter how small the stratification is. This paper present a computational approach to simulate the generation of the coherent vortex structure in late wake of a moving sphere submerged in weakly stratified fluid. The results are in consistent with several experimental observations and the vortex stretching mechanism is employed to explain the process of coherence.

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Fabrication of Large-Area Photovoltaic Crystal with Modified Surface Using Trimethoxysilyl Propyl Methacrylate (TMSPM) for Solar Cell Protection

  • Kang, Kwang-Sun
    • Current Photovoltaic Research
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    • v.2 no.3
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    • pp.84-87
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    • 2014
  • Protection of solar cell surface is important to prevent from dust, pollen, sand, etc. Therefore, development of large area antifouling film is urgent for high performance of solar cells. The surface of silica spheres was modified to fabricate large area antifouling film. The surface of monodisperse silica spheres has been modified with 3-(trimethoxysilyl) propylmethacrylate (TMSPM) to fabricate large area photonic crystal. Although the surface modification of silica spheres with TMSPM has been failed for the base catalyst, the second trial using acid catalyst showed the following results. The FTIR absorption peak at $1721cm^{-1}$ representing C=O stretching vibration indicates that the TMSPM was attached on the surface of silica spheres. The methanol solution comprised of the surface modified silica spheres (average diameter of 380 nm) and a photoinitiator was poured in the patterned silicon wafer with the dimension of 10 cm x 10 cm and irradiated UV-light during the self-assembly process. The result showed large area crack and defect free nanostructures.