• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.16 no.1
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• pp.9-19
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• 2010

Purpose : To identify whether isometric shoulder horizontal extension (ISHE) exercise could sufficiently activate the lumbar multifidus muscle, and to determine appropriate exercise intensity to increase muscle strength. Methods : Twenty healthy volunteers (10 males and 10 females) participated in this study. ISHE exercises on the dominant side were performed with $90^{\circ}$ shoulder abduction held in $90^{\circ}$ elbow flexion so that their arms were in the horizontal plane. Electromyographic (EMG) measurements of multifidus activation were performed in standing and supine positions, and were taken under four strength conditions: 75%, 50% and 25% of maximum shoulder horizontal extension strength, and maximum strength. Results : The EMG activations of both lumbar multifidus increased significantly with ISHE exercises of larger % strength (p<.05). In their multifidus EMG data measured in standing and supine positions, men differed significantly in their 75%, 50% and 25% strength for both sides (p<.05), and women differed significantly in their 75%, 50% and 25% strength on their 5th lumbar vertebrae's left side, but 75% only for their 5th lumbar vertebrae's right side (p<.05). The EMG data of 5th lumbar vertebrae's left and 5th lumbar vertebrae's right sides appeared to differ significantly at all strength levels for men while standing, but only at the 25% level for women in the supine position (p<.05). These findings indicate that ISHE exercises can be considered a beneficial method to enhance the multifidus strength. Conclusion : This study provides useful information for further study in this field.

• Journal of the Korean Society of Physical Medicine
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• v.7 no.3
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• pp.303-308
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• 2012

Purpose : The purpose of this study is to define the change of lumbar asymmetry multifidus muscles when upper extremity PNF pattern. Methods : For this research, twenty-nine asymptomatic participants were voluntary attended. Under the identical conditions, Multifidus muscles were measured standing position and on L4,L5 vertebral level by MyLabOne (ESAOTE, Netherland with a 3.5MHz covex array transducer). The upper extrimity PNF pattern used to activate the multifidus ipsilateral and cotralateral. Results : Results of analysis showed that at the L4, L5 vertebral level, healthy asymtomativ subjects had asymmetry multifidus muscles size. The depth of the multifidus muscles were significantly increased at contralateral upper extrimity PNF pattern, but no significant differences were comparison ipsilateral with contralateral. Conclusion : The multifidus muscle in asymptomatic subjects clinical significance asymmetry. Contralateral upper extrimity PNF pattern seems to be the most suitable exercise for strenthen the smaller size of the multifidus. This study will be used as a prevention method of LBP.

• The Journal of Korean Physical Therapy
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• v.29 no.3
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• pp.128-134
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• 2017

Purpose: The purpose of this study is to investigate the effects of healthy persons performing a plank exercise with hip abduction and use of sling on trunk muscle activity. Methods: Twenty-three subjects participated in this study. Muscle activities of the multifidus, rectus abdominis, external oblique and internal oblique were assessed with electromyography (EMG) while the subjects performed 6 various types of plank exercises in random order. Results: There was a significant difference in multifidus and internal oblique on the supported side and the multifidus, external oblique, and internal oblique on the elevated side (p<0.05), and differences in plank methods were significantly higher in the multifidus, rectus abdominis, external oblique, internal oblique of the supported side and the rectus abdominis, external oblique and internal oblique on the elevated side (p<0.05). In addition, post-hoc analysis of the various plank methods showed that muscle activity was significantly higher during the general plank exercise compared with the knee-supported-in-sling plank exercises (p<0.05), and was significantly higher with the ankle-supported-in-sling plank exercises compared with the general plank exercise. Conclusion: There was greater trunk muscle activity with plank exercises performed with the ankle-supported-in-sling and hip abduction plank exercises compared with the general or knee-supported-in-sling plank exercises. Through this study, various plank exercises have been discovered that can be selected at different intensities for core muscle training purposes based on trunk muscle strength.

• Physical Therapy Rehabilitation Science
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• v.11 no.2
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• pp.253-258
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• 2022

Objective: This study aimed to determine the effect of internal abdominis pressure(normal, hollowing and bracing) on trunk muscle activity during one leg bridge exercise. Design: Cross-sectional study. Methods: Thirteen healthy adults (9 men and 4 women) were instructed to perform Internal abdominal pressure(IAP) control(Normal, Hollowing, Bracing) during one leg bridge. Electromyography (EMG) data (% Maximum Voluntary Isometric Contraction, MVIC) were recorded three times on both sides of the participant's Internal Oblique(IO), Effector Spinae(ES), and Multifidus(MF) muscles and the average value was analyzed. Results: As a result, Abdominal bracing one leg bridge (BOLB) group and Abdominal hollowing one leg bridge (HOLB) group showed significantly increased muscle activation of bilateral internal oblique, erector spinae and multifidus activation compared to the Normal one leg bridge (NOLB) group (p<0.05). Abdominal hollowing one leg bridge (HOLB) group had a significant difference in bilateral Internal oblique muscle activation in compared to the NOLB group (p<0.05). Conclusions: Bilateral internal oblique, erector spinae, and multifidus muscles activation in healthy adults at one leg bridge exercise showed greater activation at abdominal bracing. Therefore, in this study, IAP control can be used as an indicator of choice to the dysfunction with trunk muscle weakness and corrective exercise subject's situation when the goal is to activate the trunk muscles by performing one leg bridge.

• The Journal of Korean Physical Therapy
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• v.29 no.2
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• pp.69-73
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• 2017

Purpose: This study was conducted to investigate the effects of blood flow restriction and different support surfaces for bridge exercises on the thickness of the transverse abdominis and multifidus, which are trunk-stabilizing muscles. Methods: The study's subjects were 45 adults who were divided into three groups that performed bridge exercises over a six-week period on their respective support surfaces after blood flow restriction. Changes in the thickness of the subjects' transverse abdominis and multifidus muscles were measured using ultrasonography before the experiment, then three and six weeks after the experiment. The changes in each variable over time were analyzed using a repeated-measures analysis of variance (ANOVA). Results: The transverse abdominis showed significant differences in muscle thickness with regard to time and the interaction between time and each group (p<0.05), but no significant differences with regard to changes among groups (p>0.05). The multifidus showed significant differences in muscle thickness with regard to time, the interaction between time and each group, and changes between groups (p<0.05). Conclusion: Blood flow restriction and different support surfaces for bridge exercises led to significant differences in the thickness of the transverse abdominis and multifidus. This study's results may be used as the basis for future studies and for rehabilitation in clinical practice.

• The Journal of Korean Physical Therapy
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• v.28 no.1
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• pp.59-63
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• 2016

Purpose: The objective of this study was to identify determine the effect of the strap height on muscular activity of trunk and lower limbs muscles during bridging exercise with a sling. Methods: The subjects of the study were 17 healthy male adults. In order to For measurement of muscular activity, body surfaces electrodes were placed on areas including erector spinae, multifidus muscles, gluteus maximus, and hamstring and the results was were recorded based on three different heights of strap, which are Levels 1, 2, and 3. Results: The muscular activities in erector spinae, multifidus muscle, and gluteus maximus were significantly different in at all three heights (p<0.05)., Level 3 showed the highest the compared to Levels 1 and 2. In hamstring muscle, there was significant difference in levels 1 and 2, also and levels 1 and 3 (p<0.05),. Bbut there was no significant difference between 2 and 3. The ration of muscular activities in multifidus muscles/erector spinae and gluteus maximus/hamstrings were significantly different for all three strap heights (p<0.05). Also, Level 3 showed higher than 1 or 2. Conclusion: The results of this study suggests to adjustment of the level III, that which has high activity level of multifidus and gluteus maximus affecting trunk stability during bridging exercise using a sling.

• International Journal of Internet, Broadcasting and Communication
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• v.16 no.1
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• pp.156-162
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• 2024

The purpose of this study was to investigate the muscle activity of internal oblique, rectus femoris, and multifidus according to knee posture and foot bar angle during pilates reformer high flank exercise. Twelve women in their 20s were recruited within six months of their experience as pilates instructors. The subjects performed six types of high flanks according to knee posture and foot bar angle. EMG signals of internal oblique, rectus femoris, and multifidus during exercise were measured and analyzed by integral EMG. The collected data were processed by repeated measures two-way ANOVA. In this paper it shows the following results. First, internal oblique iEMG was not significantly different according to knee posture and foot bar angle. Second, the rectus femoris had an interaction effect according to knee posture and foot bar angle. Third, there was no significant difference in multifidus according to knee posture and foot bar angle. In conclusion, according to the exercise method, the activity of the rectus femoris was the highest in the knee bending and high foot-bar angle high plank exercise, and there was no difference between the internal oblique and multifidus.

• Journal of the Korean Society of Physical Medicine
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• v.3 no.3
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• pp.185-192
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• 2008

Purpose : The purpose of this study is to examine the effect of the electro-acupuncture stimulation into the multifidus for the lumbar flexibility improvement and pain reduction. The subjects were consisted of 20 women patients with chronic low back pain. Methods : 20 women patients with chronic low back pain voluntary participated for the research. 15 minute electro-acupuncture stimulation(frequency: 4Hz, Intensity: below threshold of pain) with Infra-red therapy, 3 times a week during 6 weeks period. Acupuncture application given to the patients' trigger point of the multifidus. The Application of multifidus was L3, L4, L5 spinal vertebra levels Short form McGill pain questionnaire (SFMPQ) was used to measure patient's pain level. Lumbar flexibility measurement was trunk flexion and trunk extension. Global Perceived Effect Scale(GPES) was used to measure recovery or worse of patient's condition. Results : SFMPQ was after treatment showed significantly decreased more than before stimulation treatment (P<.05). Lumbar flexibility was after treatment showed significantly increase more than before treatment(P<.05). GPES was after treatment showed significantly increased more than before treatment(p<.05). Conclusion : This study will be used as treatment method of patient with chronic LBP. The multifidus muscle in chronic LBP patients clinical significance. Most of chronic LBP patients have multifidus contraction pattern. So chronic LBP patients necessary multifidus muscle release treatment.

• International Journal of Contents
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• v.8 no.4
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• pp.70-73
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• 2012

The purpose of this study was to evaluate the effects of Kinesio taping(KT) on the maximal power and muscle activity of erector spinae. 30 male subjects were allocated in this study and randomly divided into experimental and control groups. All subjects were measured for maximal power of trunk extensors and muscle activities of iliocostalis lumborum, longissimus, and multifidus between pre and post experiment. Maximal power was calculated using a dynamometer(Power Track II, JTECH medical, USA), and muscle activities were calculated using a surface EMG(MP150 BIOPAC System Inc. CA. USA). Maximal power of trunk extensor showed no significant difference between pre and post intervention in both groups(p>0.05). Muscle activity of iliocostalis lumborum, longissimus, and multifidus showed no significant difference between pre and post intervention(p>0.05). Finally, there was no significant difference between Experimental and control group in maximal power and muscle activity of trunk extensor. These study results suggested that KT did not affect increase or decrease in maximal power and muscle activities of trunk extensor.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.3
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• pp.1957-1963
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• 2015

The purpose of this study is to examine the effect of dynamic stabilization exercise on unstable surface on thickness, muscle density and white area index (WAI) of transverse abdominis muscle and multifidus muscle. The subjects were 20s healthy adults and 27 people were measured for muscle thickness and muscle density, white area index after the experiment conducted during a six-week dynamic stabilization exercises divided into three groups, each in a different plane. The results showed a significant difference between the three groups (p <.05). Repeated measures analysis of variance (repeated ANOVA) results, transverse abdominis muscle and multifidus muscle thickness showed a significant difference between the groups in the time difference (p <.05), and between multifidus muscle density and white area index in the comparison between groups showed a significant difference (p <.05). In conclusion, showed significant difference in lumbar stabilization exercise part. These results seems to be utilized as a basis for future research on the lumbar stabilization exercise.