• 재활복지공학회논문지
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• 제11권3호
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• pp.119-126
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• 2017

임상현장에서 압력 바이오피드백 장치는 요통 환자들의 척추재활운동에 사용되고 있으나, 여러 가지 단점을 갖고 있다. 본 연구는 사용자에게 신체의 움직임과 균형을 센싱하고 모니터링하여 사용자에게 바이오피드백을 제공함으로써 척추재활운동시 실시간으로 정확한 운동방법과 자세를 제공하는 디지털화된 압력 바이오피드백 장치를 개발하고자 하였다. 그 후 사용성 평가를 진행하여 안전성, 수행성, 조작성, 만족성 등의 문제점을 파악하고 개선방향을 제시하고자 한다. 본 연구에 참여한 대상자는 총 33명으로 전문가 평가 집단 11명, 사용자 평가 집단 22명으로 실제 개발된 장비를 사용 후 5점 척도로 평가하였다. 사용자 집단에서는 안전성 3.59점, 조작성 4.38점, 만족성 4.49점으로 나타났으며, 전문가 집단에서는 안전성 2.86점, 조작성 3.91점, 수행성 4.28점으로 나타났다. 본 사용성 평가를 바탕으로 태블릿PC 거치대의 안정성 문제, 공기주입, 화면 표시 등의 문제점을 개선한다면 척추안정화 운동을 하면서 실시간 자신의 운동상태를 확인하여 정확한 운동과 기능 평가가 가능한 운동장치가 될 것이다.

• 한국전문물리치료학회지
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• 제14권4호
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• pp.14-20
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• 2007

To improve abdominal muscles strengthening, double straight leg lowering (DSLL) has been widely used in physical therapy, fitness program, and athletic program. The purpose of this study was to investigate the effects of the lumbar stabilization maneuver with a pressure biofeedback unit on the muscle activity of rectus abdominis (RA), external oblique (EO), and internal oblique (IO) during DSLL. Fourteen healthy young men were recruited from university population. The electromyography (EMG) activity was recorded from the RA, EO, and IO of both sides. The normalized EMG activity was compared using a paired t-test. The study showed that EMG activity in the RA, EO, and IO was significantly higher during DSLL with lumbar stabilization (DSLL-LS) compared to performed DSLL (p<.05). These results suggest that DSLL-LS is recommended as an effective method for strengthening exercise for the abdominal muscles.

• 한국전문물리치료학회지
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• 제16권4호
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• pp.1-7
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• 2009

The active-knee-extension (AKE) test has been used to measure hamstring muscle length. The traditional AKE test measures the popliteal angle to the point of resistance with a 90-degree flexion of the hip fixed by straps, while the stabilized AKE test measures the popliteal angle to the point of resistance with a 90-degree flexion of the hip stabilized using a pressure biofeedback unit providing lumbopelvic stabilization. The purpose of this study was to determine test-retest reliability of the traditional AKE test and stabilized AKE test. Twenty healthy adults participated in the study. The popliteal angles were measured with a digital inclinometer during each test. To assess the test-retest reliability between the 2 test sessions, intraclass correlation coefficients (ICCs) were calculated. The intrasubject coefficient of variation ($CV_{intra}$) was also calculated. To compare the traditional and stabilized AKE tests for changes in pressure, paired t-tests were applied. The results of this study were as follows: 1) ICCs(3,1) value for test-retest reliability was .96 in the traditional AKE test, and was .98 in the stabilized AKE test. 2) The maximal $CV_{intra}$ was 33.7% in the traditional AKE test and 15.7% in the stabilized AKE test. 3) Differences of $6.1{\pm}2.1$ mmHg in pressure were measured in the traditional AKE test, and differences of $1.2{\pm}1.0$ mmHg in pressure were measured in the stabilized AKE test. The results show the traditional and stabilized AKE test to be highly reliable, with test-retest reliability. However, the stabilized AKE test represented less variation and more stabilization than the traditional AKE test. Further study is needed to measure the inter-rater reliability of the stabilized AKE test for generalization and clinical application.

• The Journal of Korean Physical Therapy
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• 제31권2호
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• pp.111-116
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• 2019

Purpose: This study examined the effects of horse riding simulator exercise on the thickness changes in the transverse abdominis in normal adults. Methods: Forty-five healthy adults were recruited and randomized to a horseback riding simulation exercise group (n=15), a sling exercise group (n=15), and a trunk stabilization exercise group (n=15). A horseback riding simulator offers the indoor experience of horseback riding and mimics the rhythmic movement of horseback riding, thereby provided a virtual environment, such as riding a real horse on the front screen. The velocity of the horse riding simulator exercise was regulated within the subject's ability to control the exercise on the horse riding simulator. A sling exercise group performed sling exercise under the inspection of the experimenter. In the trunk stabilization exercise group, the subjects were instructed to perform the exercise accurately and pause the session when pain occurred during the intervention. The subjects in each group carried out the interventions three times per week for six weeks. The thickness of the transverse abdominis was measured using a pressure biofeedback unit and the ultrasound. Results: Significant differences in the thickness of transverse abdominis within the groups were observed between before and after the interventions. On the other hand, there were no differences in the parameters among the groups. Conclusion: Horse riding simulator exercise can be an alternative to trunk stabilization exercise by increasing the thickness of the transverse abdominis in healthy adults.

• 재활복지공학회논문지
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• 제11권3호
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• pp.207-214
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• 2017

몸통안정성에 문제가 발생하면 허리에 통증이 발생된다. 허리 불안정성을 해소하기 위한 몸통안정화운동 방법 중 하나인 복부드로우인기법(ADIM)은 복부안정화근육 중 선행적자세조절과 관련된 배가로근에 대한 선택적인 수축을 유도하는 운동법이다. ADIM은 일반적으로 바로누운자세에서 허리 밑에 압력생체되먹임장치(PBU)을 적용하여 시각적되먹임을 한 상태에서 실시하는데 이러한 자세는 앉은자세에 비해 기능적이지 못하다. 본 연구에서는 바로누운자세와 앉은자세에서 실시하는 ADIM의 효과를 알아보기 위해 31명의 건강한 남녀를 대상으로 무선 근전도를 이용해 배곧은근(RA), 배바깥빗근(EO), 배가로근/배속빗근(TrA/IO), 그리고 척추세움근(ES)에 대한 근활성도를 비교하였다. 본 연구 결과 RA와 EO에서는 두 자세 간에 유의한 차이가 없었으며 TrA/IO와 ES에서는 두 자세 간에 유의한 차이가 나타났다. 또 RA에 비해 TrA/IO의 활성도가 높게 나타나 ADIM로 인한 몸통안정화는 두 자세 모두에서 효과적으로 나타났으며 반면 TrA/IO와 ES는 앉은 자세에서 더 높은 활성도를 보여 자세 안정화 근육의 활성도가 앉은 자세에서 더 증가한 것으로 사료된다. 따라서 일상생활에서 보다 쉽게 적용할 수 있는 앉은 자세의 ADIM은 허리안정성 향상에 유용할 것이다.

• Physical Therapy Rehabilitation Science
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• 제9권1호
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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.

• 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.