Tensile Force Transmission from the Upper Trunk to the Contralateral Lower Leg throughout the Posterior Oblique Sling System

Lim, Wantae

doi:10.13189/saj.2021.090217

Cited by 11 publications

(7 citation statements)

References 33 publications

(54 reference statements)

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“…The POS muscles are involved in dynamic lumbo-pelvic stability, and the thoracolumbar fascia, latissimus dorsi, erector spinae, gluteus maximus, and biceps femoris connect the upper extremities to the lower extremities by crossing the posterior side of the body in an 'X' shape [5,12]. Previous studies have mostly measured the EMG of the POS muscles in the prone position [6,10].…”

Section: Discussionmentioning

confidence: 99%

“…Third, during QHE with SFE, EMG of the contralateral lower trapezius (61.75% RVC) was the highest among the POS muscles and was significantly higher than the activities for that muscle during QHE and QHE with SEI. The middle and lower trapezius muscles are located at the superficial back line of POS and play important roles in controlling the rotation of the trunk and pelvis [12]. The lower trapezius facilitates torque generation during shoulder abduction and external rotation through a longer moment arm [17].…”

Section: Discussionmentioning

confidence: 99%

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Activity of Posterior Oblique Sling Muscles during Quadruped Hip Extension with Different Shoulder Positions

Park¹,

Lim²

2022

saj

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Activity of Posterior Oblique Sling Muscles during Quadruped Hip Extension with Different Shoulder Positions

Park¹,

Lim²

2022

saj

Self Cite

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“…For this reason, studies related to FBP and lumber pain have continued to be conducted [4][5][6]. However, improper trunk postures can affect muscles in not only the lower back, but also the neck and shoulders [7][8][9]. Slouched postures are also reported to have influenced the alignment of the neck and scapula, thereby influencing movements or muscle activities of the scapula and upper arms [10][11].…”

Section: Introductionmentioning

confidence: 99%

Effects of Trunk Postures and Shoulder Flexion Angles on the Muscular Activity of Scapular Upward Rotators

Park¹,

Weon²

2021

saj

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The forward bending posture is a risk factor that can cause musculoskeletal injury for workers working in industry. Previous studies have been largely concerned with examining the effects of turtle neck, slouched posture, and kyphosis on the scapular upward rotators. However, no studies have investigated the effect of forward bending of the trunk on the scapular upward rotators to date. The purpose of this study was to investigate the effect of forward tilting of the trunk and the shoulder flexion angle on the muscular activity of the Upper trapezius. The participant population comprised of 10 male adults and 20 shoulders in total were assessed. To begin with, EMG electrodes were attached to the upper trapezius muscles. The participants were instructed to perform isometric shoulder flexion at 120° angles in upright standing and forward bending postures. The muscle activity was measured by surface electromyography to obtain a root mean square value and was expressed as a percentage of the mean maximal voluntary isometric contraction (%MVIC). A paired t-test was used to determine the changes in muscle activity according to trunk posture and a shoulder flexion angle. A paired t-test was performed at α=.05. The result of Significant main effect for trunk posture was found for the upper trapezius muscles(p<.05). Additionally, a significant main effect for shoulder flexion angle was revealed in the upper trapezius muscles(p<.05). The results demonstrate that forward bending of the trunk may increase the activity of the upper trapezius. Therefore, industrial workers who manifest hyperactivation of the upper trapezius should maintain upright trunk posture while working.

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“…There are many studies on the relationship between the lumbopelvic and hip joints [24][25][26][27] and the relationship between ankle and hip instability. However, few studies have revealed the relationship between lumbopelvic and ankle instability [28]. In addition, there is limited research on exercise methods that aim to stabilize the lumbopelvic area to resolve functional ankle instability related to the hip joint.…”

Section: Introductionmentioning

confidence: 99%

Effects of Hip Joint Strengthening Exercises and Lumbopelvic Stabilization Exercises on Balance and Instability of Adults with Functional Ankle Instability

Lee¹,

Kim²

2021

saj

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In subjects with functional ankle instability, lumbopelvic instability causes instability of the hip and lower extremities. The purpose of this study is to investigate the effect of a lumbopelvic stabilization exercise program on the balance and instability of adults with functional ankle instability. 30 adults with functional ankle instability were assigned to a hip joint strengthening exercise group and a lumbopelvic stabilization exercise group at random. General ankle intervention was used in the hip joint strengthening exercise group, whereas a stabilization exercise using a sling was added in the lumbopelvic stabilization exercise group. The dynamic balance ability, static balance ability, and ankle instability were measured. A Paired-sample t-test was conducted to see the within-group changes in dynamic balance, static balance, and ankle instability scale before and after the experiment. To compare the changes between groups, an independent-sample t-test was conducted. The lumbopelvic stabilization exercise group showed increased the posterior-lateral distance and the scores on foot and ankle ability measures (p<0.05). The average movement distance of the center of pressure, average movement speed, and average movement area 95% decreased significantly (p<0.05). The ankle instability instrument score decreased (p<0.05). The results suggest that existing lumbopelvic stabilization exercises not only help reduce the pain and enhance the function of the hip joint they are also an effective approach for adults with functional ankle instability. Lumbo-pelvic stabilization exercise programs that are tailored to individual characteristics, such as functional level, muscle strength, and duration of ankle injury, reduce the frequency of re-injury and stabilize ankles to improve pain and function.

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Tensile Force Transmission from the Upper Trunk to the Contralateral Lower Leg throughout the Posterior Oblique Sling System

Cited by 11 publications

References 33 publications

Activity of Posterior Oblique Sling Muscles during Quadruped Hip Extension with Different Shoulder Positions

Activity of Posterior Oblique Sling Muscles during Quadruped Hip Extension with Different Shoulder Positions

Effects of Trunk Postures and Shoulder Flexion Angles on the Muscular Activity of Scapular Upward Rotators

Effects of Hip Joint Strengthening Exercises and Lumbopelvic Stabilization Exercises on Balance and Instability of Adults with Functional Ankle Instability

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