• 대한물리의학회지
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• 제1권1호
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• pp.59-66
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• 2006

Purpose : The purpose of this study was to investigate the effects of diaphragmatic breathing on activation of lumbar paraspinal muscles of normal healthy people. Diaphragmatic breathing may affect activation of trunk muscles. The assumptions are as follows: the crural diaphragm attatches to the lumbar vertebrae from L1 to L3, the voluntary downward pressurization of the diaphragm increases intra-abdominal pressure, and this increases the stiffness of the spine. Methods : Sixty male college students ranging 19 to 34 years were screened and % maximal voluntary contraction(% MVC) of trunk muscles on the four positions of back extension exercise was compared during the pre and post of inspiration of diaphragmatic breathing. Results : 1. % MVC of right and left erector spinae had the statistically significant difference between pre and post inspiration of diaphragmatic breathing in the dynamic right arm and left leg extension position(p<0.05). 2. % MVC of right and left erector spinae had the statistically significant difference between pre and post inspiration of diaphragmatic breathing in the dynamic left arm and right leg extension position(p<0.05). 3. % MVC of right and left erector spinae had the statistically significant difference between pre and post inspiration of diaphragmatic breathing in the static lying prone extension position(p<0.05). 4. % MVC of right and left erector spinae had the statistically significant difference between pre and post inspiration of diaphragmatic breathing in the static lying on prone position(p<0.05). Conclusion : This study will be used as the purpose of data collection of lumbar paraspinal muscles on diaphragmatic breathing and be introduced as the new therapeutic intervention for management of patients with back pain.

• 한국안전학회지
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• 제10권4호
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• pp.103-108
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• 1995

This study was performed to investigate a relationship between a biomechanical analysis of compressive force at L5/S1 and electromyographic analysis of erector spinae muscle during lifting task. In the experiment, isometric contractions at 25, 50, 75, 100%MVC for short duration and sustained isometric contractions at 50%MVC were performed. For muscle recruitment patten and compressive force analysis, rectified EMG amplitudes analysis and computerized biomechanical analysis were used. To achieve data, angles of neck, shoulder, elbow, wrist, hip, knee, ankle and length of body segments were measured. Results shows that trends of initial EMG rectified amplitude were similar to those of biomechanical calculation value and for sustained isometric contraction at 50%MVC EMG rectified amplitude of erector spinae muscle after 40seconds was increased up to level of 75%MVC. Based on the results of this study, biomechanical analysis should be supplemented considering muscle fatigue, and it is also suggested that work-rest cycle critera and the evaluation of back-pain injuries should include muscle fatigue.

• 웰빙융합연구
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• 제5권1호
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• pp.31-35
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• 2022

Purpose: This study was conducted to investigate the effects of change in the unstable support surface location during bridge exercise on the muscle activity of erector spinae and gluteus maximus. Research design, data and methodology: 12 healthy participants aged 23.32 ±1.02 were measured muscle activities of erector spinae and gluteus maximus during bridge exercise and compared between the exercise conditions; unstable support surface located on upper back and feet during bridge exercise. Paired t-test was performed to identify whether there was a significant difference in the muscle activities between the exercise conditions. Results: As a result, even though higher levels of the averaged muscle activities of both erector spinae and gluteus maximus during exercise in unstable support surface located on feet than upper back were observed, no significant differences were found. Conclusions: The change of unstable support surface location during bridge exercise for low back pain rehabilitation would be more appropriate to be used to increase levels of tension of muscle activities and train fine motor control rather than to strengthening muscle strength.

• 한국융합학회논문지
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• 제7권5호
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• pp.51-57
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• 2016

본 연구는 초음파 영상(ultrasound imaging)을 이용하여 네발기기 자세(quadruped position)에서 골반압박벨트(pelvic compression belt)가 뭇갈래근과 척추세움근의 근두께에 융합적으로 미치는 영향을 알아보기 위해 실시되었다. 대상자는 30명의 남자대학생으로 실험에 자발적으로 참여한 자로 선정하였다. 골반압박벨트를 위앞엉덩뼈가시아래(anterior superior iliac spines)에 착용한 상태와 착용하지 않은 상태에서 네발기기 자세를 실시하였고, 초음파영상 진단장치를 이용하여 근 두께를 측정하였다. 자료분석은 반복측정분산분석을 이용하였다. 연구결과, 뭇갈래근의 경우 골반압박벨트를 착용하였을 때가 착용하지 않았을 때보다 근두께가 유의하게 증가하였고(p<.05), 척추세움근의 경우도 골반압박벨트를 착용하였을 때가 착용하지 않았을 때보다 근두께가 유의하게 증가하였다(p<.05). 따라서 본 연구결과를 통해 골반압박벨트의 착용이 요통환자에게 효과적이며, 임상에서 다양한 네발기기 자세운동의 처방과 적용 시에 유용한 자료로 활용하고자 한다.

• 대한물리의학회지
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• 제12권3호
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• pp.73-77
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• 2017

PURPOSE: The present study aimed to measure muscle activities in the pectoralis major, the erector spinae, and the quadriceps femoris according to support surface states of arms and legs during plank exercise. METHODS: The subjects of this study were 21 healthy males in their 20s and their muscle activities at three states were measured as follows: The first state was where the support surface of arms and legs was stable. The second state was where only arms were unstable, and the third state was where only legs were unstable. Electromyography (EMG) was used to measure muscle activities. Pectoralis major, quadriceps femoris, and elector spinae were measured for muscle activities. RESULTS: The muscle activities in the pectoralis major were statistically high when arms were unstable. The muscle activities in the quadriceps femoris were statistically high when legs were unstable. The muscle activities in the erector spinae were higher when arms and legs were unstable compared to that at the stable support surface. No significant difference was revealed statistically when arms and legs were unstable. CONCLUSION: If the instability of arms and legs is employed during plank exercise, exercise on the upper and lower bodies or the erector spinae is expected to be more effective.

• 한국산학기술학회논문지
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• 제22권1호
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• pp.45-51
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• 2021

본 연구는 30Hz 전신 진동운동 적용이 척추세움근의 형태인 두께 변화와 근육의 특성 변화인 기계적 속성에 미치는 영향을 알아보는 데 그 목적이 있다. N 지역에 거주하는 성인 남성 11명, 여성 13명 총 24명으로 모집단을 구성하였고 30Hz 전신 진동 운동군 12명, 허리 안정화 운동군 12명으로 나누어 시기별, 군간 상호작용, 군간 변화를 확인하기 위해 운동 전, 4주 후, 8주 후로 시기를 나누어 척추세움근의 두께와 근육 기계적 속성의 변화를 2요인 반복측정 분산분석(two-way repeated ANOVA)을 이용하였고 유의수준 α=0.05로 하였다. 시기와 군간 상호작용이 있는 경우에는 사후분석을 하였으며 유의수준 α=0.01로 하였다. 척추세움근의 두께, 주파수, 강성, 변형률은 시기별, 시기와 군간 상호작용에서 유의한 차이가 있었고(P<0.05), 원형회복속도는 시기별에서만 유의한 차이가 있었다(P<0.05). 본 연구 결과를 보면 30Hz 전신 진동운동은 척추세움근의 두께와 기계적 속성에 긍정적인 영향을 미친다는 것을 알 수가 있어 향후 전신 진동운동 기초자료와 임상에서 허리 안정화 운동으로 활용 가능성을 제시한다.

• 한국산학기술학회논문지
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• 제18권7호
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• pp.476-482
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• 2017

본 연구는 의자 좌면 높이가 척추 세움근과 배곧은근의 근 활성도에 어떠한 영향을 미치는지 알아보고자 실시하였다. 건강한 남녀 30명을 대상으로 세 가지 높이의 의자 좌면에 앉게 하고 양쪽 척추 세움근과 배곧은근의 근활성도를 표면 근전도 장비를 사용하여 측정하였다. 반복측정된 일요인 분산분석을 통해 세 가지 높이의 의자 좌면에 따른 근활성도의 차이를 비교하였고 유의수준(a)은 0.05로 설정하였다. 연구 결과 의자 좌면 높이에 따라 양쪽 배곧은근의 근활성도는 유의한 차이를 보였고 양쪽 척추 세움근의 근활성도는 유의한 차이가 없었다. 양쪽 배곧은근은 낮은 높이의 의자 좌면에서 정상 높이와 높은 높이의 좌면에 비해 근활성도가 유의하게 증가하였다. 본 연구결과를 통해 앉은 자세에서 의자 좌면의 높이는 배곧은근의 근 활성도에 영향을 줄 수 있으며 배곧은근의 근활성도 증가는 요통과 같은 근골격계 통증을 일으킬 수 있으므로 근골격계 통증을 예방하기 위해 바르게 앉은 자세와 함께 의자 좌면 높이는 중요하다.

• 한국운동역학회지
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• 제16권3호
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• pp.117-124
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• 2006

The modern convenient life formed by industrial development becomes lack of exercise and takes an interest in diet. Specially, professional walking shoes is developed as people take an interest in jogging, Those shoes, professional walking shoes or Dietshoes, increase exercise effects by change of heel types. Therefore, this study investigated motility effects by EMG experiment in order to measure Muscle Activities (MA) while wearing diet shoes (backless). Experiment was conducted by EMG measurement, from calf (gastrocnemius muscle), thigh (vastus muscle) and waist (erector spinae muscle), of 12 high school students. Exercise effects between the two shoes were analyzed by EMG (MF; Median Frequency, MPF; Mean Power Frequency, ZCR; Zero Crossing Rate). Results showed that the Dietshoes(MF: 48.21Hz, MPF: 65.0Hz, ZCR: 100.6Hz) had larger EMG value than that of Normal shoes(MF: 40.47Hz, MPF: 58.04Hz, ZCR: 82.09Hz). Also, in MA, the highest activities are showed in the calf, the second one is in waist, and last one is in thigh during gate. ANOVA between shoes in measurement parts showed significant effects in MF (gastrocnemius: p-value=.022, vastus laterals: p-value=.037, erector spinae: p-value=.082), MPF (gastrocnemius: p-value=.032, vastus laterals: p-value=.046, erector spinae: p-value=.090), and ZCR (gastrocnemius: p-value=.000, vastus laterals: p-value=.004, erector spinae: p-value=.134). And MA of Dietshoes is higher than that of Normal shoes, and decreasing rate of MA in Dietshoes is less than that of Normal shoes. Thus, this study validates exercise effects of Dietshoes.

• 대한정형도수물리치료학회지
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• 제18권2호
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• pp.23-29
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• 2012

Background: The present study was conducted with 30 adult males in order to examine the muscle activity of the trunk and the lower extremities at diverse initial bending angles of the hip joint during bridge exercise on a stable surfaces and on an unstable surface that is widely performed for stabilization. Methods: The initial angles of the hip joint used were $0^{\circ}$, $45^{\circ}$ and $90^{\circ}$ and the subjects were divided into a matt experimental group and a balance training group. Results: In maximum values of muscle activity at different exercise methods and angles, the matt experimental group showed statistically significant differences in the muscle activity values of the rectus abdominis muscle, the erector spinae muscle, the rectus femoris muscle and the peroneus muscles between different angles while the balance training group showed significant differences only in the muscle activity values of the erector spinae muscle between different initial angles of the hip joint. The matt experimental group showed significant differences in muscle activity between initial angles $0^{\circ}$ and $90^{\circ}$, between $45^{\circ}$ and $90^{\circ}$ in the rectus abdominis muscle, between $0^{\circ}$ and $90^{\circ}$ in the erector spinae muscle, between $45^{\circ}$ and $90^{\circ}$ in the rectus femoris muscle and between $0^{\circ}$ and $90^{\circ}$ in the peroneus muscles while the balance training group showed significant differences between $0^{\circ}$ and $90^{\circ}$ in the erector spinae muscle. Conclusions: Therefore, it is thought that bridge exercises should be applied to patients using diverse methods.

• 한국전문물리치료학회지
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• 제13권4호
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• pp.56-63
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• 2006

This study examined the effects of the abdominal drawing-in (ADI) maneuver using a pressure biofeedback on muscle recruitment pattern of erector spinae and hip extensors and anterior pelvic tilt during hip extension in the prone position. Fourteen able-bodied volunteers, who had no medical history of lower extremity or lumbar spine disease, were recruited for this study. The muscle onset time of erector spinae, gluteus maximus, and medial hamstring and angle of anterior pelvic tilt during hip extension in prone position were measured in two conditions: ADI maneuver condition and non-ADI maneuver condition. Muscle onset time was measured using a surface electromyography (EMG). Kinematic data for angle of anterior pelvic tilt were measured using a motion analysis system. The muscle onset time and angle of anterior pelvic tilt were compared using a paired t-test. The study showed that in ADI maneuver during hip extension in prone position, the muscle onset time for the erector spinae was delayed significantly by a mean of 43.20 ms (SD 43.12), and the onset time for the gluteus maximus preceded significantly by a mean of -4.83 ms (SD 14.10) compared to non-ADI maneuver condition (p<.05). The angle of anterior pelvic tilt was significantly lower in the ADI maneuver condition by a mean of 7.03 degrees (SD 2.59) compared to non-ADI maneuver condition (15.01 degrees) (p<.05). The findings of this study indicated that prone hip extension with the ADI maneuver was an effective method to recruit the gluteus maximus earlier than erector spinae and to decrease anterior pelvic tilting.