• 대한정형도수물리치료학회지
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• 제25권1호
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• pp.21-27
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• 2019

Background: The purpose of this study was to investigate the effects of Graston technique for lower extremity range of motion (ROM), muscle strength, walking ability in hemiplegia patients. Methods: Twelve subjects participated in this study. The ROM of the knee extension was measured by 90-90 straight leg raise test, the hamstring and quadriceps muscle strength was collected by utilizing a handheld dynamometer. In addition walking speed was evaluated by 10 meter walking test. The group was applied intervention using a Graston instrument for one minute. After intervention, immediate effect was assessed. The significant level was set at ${\alpha}=.05$. Results: The ROM of the knee extension, quadriceps muscle strength and walking speed were significantly increased. Hamstring muscle strength was significantly reduced. Conclusion: The results of this study suggest that Graston instrument technique has the effect of instantaneously flexibility the muscles, and the muscle applied with the technique has weakened, while the muscle of the opposite side has increased the muscle strength. In addition, the muscle flexibility and the walking speed have increased.

• 한국임상수의학회지
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• 제37권3호
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• pp.163-167
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• 2020

A 13-month-old, 3.3 kg castrated male Shih-tzu presented with right hindlimb lameness. The physical examination revealed atrophy of the right thigh muscles, hyperextension of the stifle joint and external torsion of the tibia. On the radiographic examination, patella alta and genu recurvatum were observed. A biapical deformity of the tibia and external torsion of the distal tibia were detected by computed tomography (CT). A three-dimensional (3D) printed bone model was designed and constructed for the preoperative plan prior to surgery. Rectus femoris muscle transposition, femoral shortening ostectomy and open wedge osteotomy of the distal tibia were performed using hybrid external skele/t0al fixation (hybrid-ESF). A dynamic stifle flexion apparatus was used to prevent recurrence of a quadriceps contracture (QC). Intense physiotherapy was administered postoperatively. The dog began to use the affected limb one week after surgery. Functional improvement in the affected limb was observed, and full weight-bearing was possible at 3 months after surgery. Union of the osteotomy lines was observed at 3 months, and the stifle joint was fully movable at 7 months after surgery. Regarding the treatments for QC, these methods may be excellent candidates, as they do not lead to severe damage to the limb or amputation.

• 한국운동역학회지
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• 제22권2호
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• pp.201-208
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• 2012

The purpose of this study was to investigate the effect of leg extension exercises performed on outdoor resistance exercise machines on knee extension muscle strength and quadriceps muscle group cross sectional area (CSA) in elderly women. Two groups were recruited for this study, including an exercise group (EG: n=13, $71.38{\pm}2.79$ yrs) and a control group (CG: n=5, $73.4{\pm}5.94$), In all subjects, maximum isometric and isokinetic muscle strength of knee flexion and extension were measured using an isokinetic dynamometer (Cybex(R) Humac Norm Testing & Rehabilitation System, USA). Quadriceps muscle group CSA were measured using MRI (Philps, Intera 1.5 T, NE Netherlands). The results of this study showed that post-intervention isometric knee extension peak torque value were higher than pre-intervention measures in the EG. However, the EG did not show improvement in quadriceps muscle group CSA, Also, no differences in the shift of optimal knee joint angle were observed between pre and post-intervention exercise. Outdoor leg extension exercise showed small increases in muscle strength in comparison to other resistance training exercises. The results of this study suggest that because outdoor leg extension exercise machines lack a progressive loading mechanism, significant increases in muscle strength may not be obtained.

• 미래기술융합논문지
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• 제2권2호
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• pp.31-38
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• 2023

본 연구는 서 있는 자세에서 측정된 정적균형과 근육두께(배근육, 넙다리네갈래근)의 상관관계를 확인하였다. 29명의 건강한 성인 29명이 본 연구에 참여하였으며, 근육두께와 정적균형을 측정하였다. 넙다리곧은근의 근육 두께는 정적균형체중분포지수와 유의한 상관관계를 나타냈다. 그러나 다른 근육과의 유의한 관계는 발견되지 않았다. 본 연구는 건강한 20대 남성만을 대상으로 하였으며, 그 결과를 다른 연령대에 일반화할 수 없었다. 본 연구의 한계점으로는 근력과 시각이 측정되지 않아 연구의 정확성을 표현하고 결과를 일반화하기에는 무리가 있어 보인다. 향후 연구에서는 대단위의 피험자 수를 대상으로 근력을 추가적으로 측정하여 연구를 진행할 필요가 있다.

• 디지털융복합연구
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• 제12권7호
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• pp.365-370
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• 2014

본 연구에서는 하지 골절 후 회복기 환자에게 러시안전류 자극이 넙다리네갈래근의 근수행력과 활성도에 미치는 영향을 알아보기 위하여 실시하였다. 본 연구는 2013년 1월 9일에서 2013년 3월 16일까지 실시하였으며, 하지 골절 후 회복기에 있는 환자 20명을 대상으로 실험을 실시하였다. 러시아 전류자극기의 큰 도자를 넙다리네갈래근의 근위부에 위치하고, 작은 도자는 원위부에 부착시키고 한 주에 세 번, 6주 동안 적용하였다. 대상자의 넙다리네갈래근의 근활성도를 측정하기 위해 근전도가 이용되었고, 근수행력을 측정하기 위해 등속성기기가 이용되었다. 연구결과 기간별 넙다리네갈래근의 근수행력 차이는 러시안전류 치료 전과 비교하여 4주 후와 6주 후에서 유의한 근수행력의 증가를 나타내었다. 또한 넙다리곧은근, 안쪽넓은근, 가쪽넓은근의 근활성도는 치료 전과 비교하여 4주 후와 6주에서 유의한 증가를 나타내었다. 이와 같은 결과는 러시안 전류가 하지 골절 등과 같은 문제로 인해 약화된 하지 근육의 근력 강화를 위해 선택될 수 있는 효과적 치료 방법이라 할 수 있다.

• 한국의류산업학회지
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• 제18권6호
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• pp.755-765
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• 2016

Recently, interest in monitoring health and sports is growing because of the emphasis on wellness, which is accelerating the development and commercialization of smart clothing for biosignal monitoring. In addition to exerciseeffect monitoring clothing that tracks heart rate and respiration, recently developed clothing makes it possible to monitor muscle balance using electromyogram (EMG). The electrode for EMG have to attached to an accurate location in order to obtain high-quality signals in surface EMG measurement. Therefore, this study develops monitoring clothing suitable for different types of human bodies and aims to extract suitable range of EMG according to movements in order to develop self-fitness monitoring clothing based on EMG measurement. This study identified and attached electrodes on six upper muscles and two lower muscles of ten males in their 20s. After selecting six main motions that create a load on muscles, the 8-ch wireless EMG system was used to measure amplitude value, noise, SNR and SNR (dB) in each part and statistical analysis was conducted using SPSS 20.0. As a result, the suitable range for EMG measurement to apply to clothing was identified as four parts in musculus pectoralis major; three parts in muscle rectus abdominis, two parts each in shoulder muscles, backbone erector, biceps brachii, triceps brachii, and musculus biceps femoris; and four part in quadriceps muscle of thigh. This was depicted diagrammatically on clothing, and the EMG-monitoring sensing locations were presented for development of self-fitness monitoring.

• 한국전문물리치료학회지
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• 제4권2호
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• pp.66-76
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• 1997

The purpose of this study was to compare the integrated electromyographic activity ratios of vastus lateralis(VL); rectus femoris lateral portion (RFL); rectus femoris medial portion(RFM); and vastus medialis(VM) muscles of 30 healthy subjects under three proprioceptive neuromuscular facilitation(PNF) techniques. Each subject was randomly assigned to one of 3 PNF techniques groups : slow reversal(SR), slow reversal hold(SRH) and rhythmic stabilization (RS). Each person was positioned in supine with the right hip flexed to $45^{\circ}$ and the knee fully extended and received a total of 6 sessions. Each technique was applied to the right lower extremity in two diagonal patterns while electrical activity was monitored from the ipsilateral muscles VL, RFL, RFM, and VM, respectively. Comparison of normalized mean EMG magnitudes from VL, VM showed that RS demonstrated significantly greater activity than that of SR or SRH and that RFL and RFM did not demonstrate any greater relative EMG activity with the three PNF techniques than did VL or VM.

• 한국정보전자통신기술학회논문지
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• 제8권1호
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• pp.65-69
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• 2015

작업치료에서 관절의 가동성은 치료 절차와 기간에 영향을 미치는 중요한 요소이다. 수동적 스트레칭과 능동적 스트레칭을 병행하는 고유수용성 신경근 촉진법이 고관절의 가동성에 미치는 영향과 주요 굽힘/폄근의 근전도 활성정도 바탕으로 고유수용성 신경근 촉진 스트레칭의 생체역학적 특징을 고찰하였다. 10명의 20대 학생을 대상으로 고유수용성 신경근 촉진 스트레칭을 실시한 결과 고관절의 가동성이 전담 보조자의 도움을 받았을 때, 평균 $18.9^{\circ}$ 증가하였고 넙다리네갈래근과 뒤넙다리근의 근전도의 활성 또한 고유수용기의 생체역학적 특징을 나타내었다.

• 한국운동역학회지
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• 제20권4호
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• pp.407-414
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• 2010

The purpose of this study was to evaluate the effect of taping-tape with or without using spiral taping on vertical jump. The subjects for this study were about 20 years old healthy male college students without muscloskeletal diseases. Data for EMG activity and Ground Reaction Force(GRF) were estimated at three knee angles(i.e., 45, 90 & full degree). As a result, there was no statistical significance in max GRF at 90 and full degree regardless of spiral taping-tape. On the other hand, statistical significance was found when vertically jumping at 45 degree knee angle(p<.05). All the data for EMG activity at the three knee angles were not statistically significant, but there was a trend for a decrease in average EMG activity in elector spinae & Medial gastrocnemius at 90 degree knee angle. Based on these data, initial flexor action of knee was stabilized with spiral taping-tape when vertically jumping, resulting in improved muscular activity in Medial gastrocnemius. In conclusion, taping technique for jumping ability associated muscles like quadriceps is also required to develop.

• 대한정형도수물리치료학회지
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• 제27권2호
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• pp.37-43
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• 2021

Background: The purpose of this study is to compare and analysis the changes in strength and endurance of the knee extensor muscles after Anterior cruciate ligament reconstruction. Methods: Twelve male subjects with ligament injury were seated on Biodex and the hip joint was flexed at 110°, and torso, lower extremities, and legs were fixed using Velcro. The resistance device was placed at a point 3cm above the ankle, and measurements were taken before and a surgery at 60°/sec and 180°/sec when the knee was maximally extended. The postures ingeniously combine forward-bending poses countered with backward-bending ones. Results: There was no significant difference in the comparison of muscle strength of 60°/sec and 180°/sec before surgery. But there was a significant difference after surgery. There was significant difference in muscle endurance both before and after surgery. There was a significant difference in the pre- and post- operative comparison values of muscle strength and endurance in isokinetic movements at 60°/sec and 180°/sec during knee extension on the injured side. Conclusion: For cruciate ligament tears, Orthopedic reconstruction is recommended. Correct alignment of the knee ligament after surgery can enhance the strength and endurance of the quadriceps femoris during knee extension rejuvenated.