• 한국운동역학회지
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• 제16권2호
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• pp.121-134
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• 2006

The purpose of this study was to analyze the effect of different types of rehabilitation training program on the kinetic and kinematic parameters during sit-to-stand movement(STS) in chronic stroke patients. Two groups of hemiparetic patients, experimental and control, participated in the study. The experimental group participated in a 10-week training program (three sessions/wk, $1{\sim}1.5\;hr/session$) consisting of a warm-up, aerobic exercises, lower extremity strengthening. and a cool-down. The control group participated in an aerobic exercise. Three dimensional kinematic analysis and force platform; were used to analyze the duration of STS, lower extremity angle, and weight bearing ability. The experimental group which had more strength of lower extremity displayed decrease in duration of STS. However, the control group showed increases in duration during sit-to-stand movement. The control group flexed their trunk more than the group did Therefore, it took more time to extend their trunk during STS. The duration in sit-to-stand was affected by the strength of lower extremity and the angle of trunk movement. The angles of ankle and knee joint had an influenced on duration of STS. The post experimental group performed with their feet near the front leg of the chair during sit-to-stand, therefore the duration was decreased. The repetitive sit-to-stand movements as a resistance exercise was effective to hemiparetic patients in learning mechanism of sit-to-stand. The control group showed decreased differences in the vertical ground reaction forces between paretic and non-paretic limbs. Their training program included strengthening exercise that may help improving weight bearing ability. The control group showed increases in the center of pressure in the anteroposterior and mediolateral displacement. This means that the stability of movement was low in the control group. Their training program which combined aerobic and strengthening exercises that are more effective to improve the stability of movement.

• 한국전문물리치료학회지
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• 제26권3호
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• pp.32-41
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• 2019

Background: Limitations in hip flexion caused by tight hamstrings lead to excessive lumbar flexion and low back pain. Accordingly, many studies have examined how to stretch the hamstring muscle. However, no study has focused on the effect of hamstring eccentric exercise for tight hamstrings on trunk forward bending. Objects: We compared the short-term effect of hamstring eccentric exercise (HEE) and hamstring static stretching (HSS) on trunk forward bending in individuals with tight hamstrings. Methods: Thirty individuals with tight hamstrings participated in the study. The subjects were randomly allocated to either a HEE or HSS group. To determine whether the hamstrings were tight, the active knee extension (AKE) test was performed, and the degree of hip flexion was measured. To assess trunk forward bending, subjects performed the fingertip to floor (FTF) and modified modified Schober tests, and the degree of trunk forward bending was measured using an inclinometer. We used paired t-tests to compare the values before and after exercise in each group and independent t-tests to compare the two groups on various measures Results: The FTF test results were improved significantly after the exercise in both groups, and AKE for both legs increased significantly in both groups. There was no significant difference in the hip angles, mmS test results, or degree of trunk forward bending between groups after the exercise. No test results differed significantly between the two groups at baseline or after the exercise. Both groups increased hamstring flexibility and trunk forward bending. Conclusion: HSS and the HEE groups increased hamstring flexibility and trunk forward bending. However, HEE has additional benefits, such as injury prevention and muscle strengthening.

• 한국전문물리치료학회지
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• 제16권2호
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• pp.31-39
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• 2009

This study is performed to investigate the difference of the spinal stability system with and without low back pain. There were 9 participants with low back pain and 9 asymptomatic subjects to be recruited, they were measured thoracic and lumbar curvature, trunk muscle activation in upright sitting postures and slump sitting, back muscle endurance, and lumbar proprioception. Spinal curvature and surface electromyography of 4 trunk muscles were measured in an upright sitting postures and slump sitting in 18 subjects. The result of the study was that there were significant differences between the groups in spinal curvature (p<.05), significantly higher external oblique activity and less internal oblique in the low back pain group than the healthy subjects (p<.05), and significantly less proprioception in the low back pain group (p<.05). But there was not a significant difference between the trunk muscle endurance groups. According to the result, the low back pain group had greater thoracic extension and higher global muscle activity in the upright sitting posture and less proprioception. This study was useful to suggest postural training for normal muscle activation, selective muscle strengthening to prevent chronic deterioration, and helpful in making a treatment plan to indicate a synthetic care method that includes increasing proprioception.

• 대한통합의학회지
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• 제7권1호
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• pp.113-124
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• 2019

Purpose : The purpose of this study is to investigate the effect of strengthening program for improving the muscle strength and body function in rehabilitation of patients with stroke Methods : We found the 15 precedent studies at online portal site of "Korea education and Research information service" and found 5 precedent studies at "Pubmed". We analyzed and describe the total 19 studies involving national and international research. Results : The strengthening exercise was adapted to lower extremities and trunk muscle of participants and the isokinetic (concentric and eccentric) exercise was most of exercise type and then manual isometric exercise, functional activities, progressive task oriented resistance exercise, PNF pattern exercise was following. The studies reported that the strengthening program increased target muscle strength and improved balance capacity and walking function for the participants positively. Conclusion : Conclusionally the several strengthening program can be the intervention to increase the muscle strength without increasing spasticity for patients with stroke. We think that the strengthening of lower extremities an improve balance capacity and walking ability and it can use the intervention to change the quality of life in patients with stroke. More than 3weeks strength program might be effectiveness, in case of acute patients with stroke, the improving of muscle strength is available but need to study for improving balance and walking capacity more in the future.

• 대한통합의학회지
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• 제7권3호
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• pp.181-188
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• 2019

Purpose: This study was performed to determine the effects of a gluteus maximus strengthening exercise on both spinal alignment and dynamic balance in subjects with kyphosis. Methods: We measured the kyphosis angle of 150 subjects and selected those whose kyphosis angle was > $50^{\circ}$. The participants included 10 male and 12 female college students. After a gluteus maximus strengthening exercise was applied, the subjects were measured by the formetric 4D and Biorescue systems. The collected data were analyzed by a paired t-test with the SPSS (Ver. 21) program for spinal alignment and dynamic balance comparisons both before and after the gluteus maximus strengthening exercise was completed. Results: The results regarding spinal alignment showed statistically significant decreases in pelvic tilt, kyphotic angle, and lordotic angle after the intervention (p < .05). However, trunk imbalance, pelvic torsion, surface rotation, and lateral deviation were not significantly different after the exercise. The results of the dynamic balance showed statistically significant increases in limits of stability after the exercise (p < .05). Conclusion: The above results suggest that the implemented gluteus maximus strengthening exercise may be effective for spinal alignment and dynamic balance in subjects with kyphosis.

• 한국운동역학회지
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• 제22권3호
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• pp.315-324
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• 2012

The purpose of current study was to investigate the effects of the heights on the lower extremities, torso and neck segments for energy dissipation during single-leg drop landing from different heights. Twenty eight young healthy male subjects(age: $23.21{\pm}1.66yr$, height: $176.03{\pm}4.22cm$, weight: $68.93{\pm}5.36kg$) were participated in this study. The subjects performed the single-leg drop landing from the various height(30, 45 & 60 cm). Force plates and motion-capture system were used to capture ground reaction force and kinematics data, respectively. The results were as follows. First, the ROM at the ankle, knee, hip and trunk was increased with the increased heights but the ROM at the neck was increased in the 60cm. Second, the angular velocity, moment and eccentric work at the ankle, knee, hip, trunk, and neck was increased with the increased heights. Third, the contribution to total work at the knee joint was not significantly different, while the ankle joint rate was decreased and hip and neck rate was increased in the 60cm, and trunk rate was increased with the increased heights. Lastly, the increase in landing height was able to augment the level of energy dissipation not only at the lower extremities but also at the trunk and neck. The findings showed that drop landing affect trunk and neck with lower extremity joints. Therefore, we need to consider that trunk and neck strengthening including stability should be added to reduce sports injury during prevention training.

• PNF and Movement
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• 제19권2호
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• pp.183-193
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• 2021

Purpose: The purpose of this research was to investigate the effects of performing Pilates exercises for eight weeks on the isokinetic trunk strength and balance of female middle school students with lumbago. Methods: Twenty-four female students who met the test requirements were recruited and randomly divided into a control group (CG, n = 16) and a Pilates exercise group (Pilates group; PG, n = 8). The PG performed a Pilates program, which consisted of lumbar muscle strengthening exercises, for 60 minutes three times a week for eight weeks. Data analysis was conducted by two-way repeated ANOVA, and a Bonferroni test was carried out when significant differences appeared. The alpha level was set at 0.05. Results: Following the experimental treatment, the PG showed an increased trunk flexion peak torque of 17% and 13% at angular velocities of 180°/sec and 300°/sec, respectively. The intergroup comparison showed no significant difference at pre-measurement, while the PG increased about 31% (180°/sec) and 15% (300°/sec) higher than the control group at post-measurement. Following the experimental treatment, the PG showed an increased trunk extensor peak torque of approximately 29% and 21% at angular velocities of 180°/sec and 300°/sec, respectively. The intergroup comparison showed no significant difference at pre-measurement, while the PG increased approximately 27% (180°/sec) and 15% (300°/sec) higher than the control group at post-measurement. Both the CG and the PG showed a 20% and 50% decrease in pain index after the experimental treatment, respectively. After the experimental treatment, the PG had about 50% lower pain than the CG. The average error rate of static balance in the PG reduced by 19% from 3.28±0.45 to 2.65±0.36, confirming a significant improvement. Conclusion: Regular Pilates exercise for eight weeks improved the isokinetic trunk muscle strength of female middle school students with lumbago and relieved their pain. Pilates was also shown to be effective in improving balance.

• 재활복지공학회논문지
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• 제9권1호
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• pp.45-51
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• 2015

본 연구에서는 3차원 척추 안정화 운동이 고령자의 체간 근력 및 신체 구성 변화에 미치는 효과에 대해 검증하고자 하였다. 피험자는 건강한 65세 이상 고령자 40명(훈련군 20명, 대조군 20명)으로 구성하였다. 피험자는 실험 전 후 척추안정화 훈련 장치를 이용하여 8가지 방향에 대한 근력 평가를 수행하였다. 또한 체성분 분석기를 이용하여 신체 구성 변화에 대한 평가를 수행하였다. 훈련군은 척추 안정화 훈련 시스템에서 방향성 훈련(F, FOR, R, BOR, B, BOL, L, FOL)을 제공하였으며, 탄력 밴드 운동, 근력 강화 체조, 걷기 운동으로 구성된 복합운동을 30분간 수행하였다. 대조군은 척추 안정화 운동을 제외한 복합운동을 실시하였으며, 모든 훈련은 주 3회, 총 8주간 실시하였다. 그 결과 훈련군은 체간 근력이 실험 전 79.9점에서 8주 후 85.6점으로 유의하게 증가하는 결과를 보였으며, 신체구성에서도 체중 감소, 체지방 감소, BMI 지수 감소 등의 결과를 나타내었다. 반면, 대조군의 경우 체간 근력의 변화는 없었지만 골격근량 증가, 체지방 감소 등의 운동 효과를 나타내었다. 이러한 결과는 척추 안정화 운동이 고령자의 체간 근력 및 신체구성 발달을 유도하여 고령자의 비만 및 낙상 예방에 도움이 될 것으로 판단된다. 향후 이러한 데이터를 기반으로 척추 안정화 훈련기기와 복합운동을 조합하여 고령자들에게 효과적인 재활 운동 프로그램 개발에 응용될 수 있을 것으로 판단된다.

• Journal of Electrical Engineering and Technology
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• 제10권6호
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• pp.2413-2419
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• 2015

Core spinal muscles are related to trunk stability and assume the main role of stabilizing the spine during daily activities; strengthening of core muscles around the spine can therefore reduce the chance of back pain. The objective of the study was to investigate the effect of core muscle strengthening in the spine during spine stabilization exercise using a whole body tilt device. To achieve this, a validated musculoskeletal (MS) model of the whole body was used to replicate the input motion from the whole body tilting exercise. An inverse dynamics analysis was executed to estimate spine loads and muscle forces depending on the tilting angles of the exercise device. The activation of long and superficial back muscles such as the erector spinae (iliocostalis and longissimus) were mainly affected by the forward direction (-40°) of the tilt, while the front muscles (psoas major, quadratus lumborum, and external and internal obliques) were mainly affected by the backward tilting direction (40°). Deep muscles such as the multifidi and short muscles were activated in most directions of the rotation and tilt. The backward directions of the tilt using this device could be carefully applied for the elderly and for rehabilitation patients who are expected to have less muscle strength. In this study, it was shown that the spine stabilization exercise device can provide considerable muscle exercise effect.

• 대한물리의학회지
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• 제11권1호
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• pp.127-132
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• 2016

PURPOSE: The purpose of this study was to investigate the effects of stage-based training, including core exercises, on scoliosis patients. METHODS: Two patients with scoliosis participated in the study. Both patients participated for eight months and were trained for an hour three times a week. The training program consisted of stretching and strengthening, as well as core exercises, and was divided into five stages. The Cobb angles and trunk lengths of the subjects were measured after one month, two months, and four months of training. Measurements were also taken after the subjects completed training. All of the measurements were taken using Formetric 4D. RESULTS: The Cobb's angle of subject A, which was $41^{\circ}$ before training, measured $30^{\circ}$ following training. The Cobb's angle of subject B also improved from $41^{\circ}$ prior to training to $34^{\circ}$ after training. Furthermore, the trunk lengths of both subjects improved. The trunk length of subject A increased from 438 mm to 450 mm and, and the trunk length of subject B increased from 433 mm to 458 mm. CONCLUSION: This study has shown that stage-based training and core training can be used as effective treatments for scoliosis patients.