Flexion relaxation of the hamstring muscles during lumbar-pelvic rhythm

Sihvonen, T

doi:10.1016/s0003-9993(97)90161-1

Cited by 63 publications

(32 citation statements)

References 13 publications

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“…At the highest level, the results of the kinematic analysis of the current study show the significant role of pelvis mobility in trunk flexion-extension with greater trunk flexion and hip flexion in the free stooping technique -an intuitive result which supports previous studies that demonstrated significant pelvic rotation in trunk the free flexionextension motion (Sihvonen, 1997;Paquet et al, 1994;Sarti et al, 2001). Peak lumbar flexion angle and peak thoracic flexion angle, on the other hand, were significantly greater in the restricted stoop as compared to the free stoop condition.…”

Section: Discussionsupporting

confidence: 89%

“…Many lumbar muscles originate on the ilium or sacrum (iliocostalis lumborum, quadratus lumborum, multifidus) and a number of lower extremity muscles originate on various locations on the ilium and ischium (gluteus maximus, biceps femoris, semitendinosus and semimembranosus). These posterior compartment thigh muscles span both the hip and the knee and are known to influence lumbar-pelvis interaction (i.e., lumbopelvic rhythm) and pelvis-femur 4 interaction (i.e., pelvifemoral rhythm) (Sihvonen, 1997). The activation of the lower extremity muscles, therefore, can influence pelvic posture and thereby impact length of the low back muscles -affecting both their active tension capability as well as their passive tension.…”

Section: Introductionmentioning

confidence: 99%

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A systems-level perspective of the biomechanics of the trunk flexion-extension movement: Part I – Normal low back condition

Jin

Mirka

2015

International Journal of Industrial Ergonomics

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Most of the previous studies of the lumbar region have not considered the influence of pelvic and lower extremity characteristics on the performance of the lumbar region. The goal of the current study was to explore these more systems-level effects by assessing the effects of a pelvic/lower extremity constraint on the biomechanical response of the lumbar spine in an in-vivo experiment. Twelve participants performed full range of motion, sagittal-plane trunk flexion-extension movements under two conditions: unconstrained stoop movement and pelvic/lower extremity constrained stoop movement (six repetitions in each condition over three days). Kinematics and muscle activities of the trunk and lower extremity muscles were monitored. Results showed a significant effect of pelvic/lower-extremity constraint on a number of lumbar performance measures.Trunk flexion angle was, as expected, significantly reduced with the lower extremity constraints (81 degrees (free stoop) vs. 56 degrees (lower extremity constrained)). At a more local level, there was a 6.4% greater peak lumbar flexion angle and a 9.1% increase in the lumbar angle at which the trunk extensor musculature demonstrated flexionrelaxation in the constrained stooping condition as compared to the unconstrained stooping condition. Also, the EMG of the L3/L4 paraspinals was greater in the restricted stooping as compared to the free stooping (16.3% MVC vs. 15.1% MVC).Relevance to Industry: Low back injuries are a significant challenge to many industries and developing accurate models of spinal stress at full stooping postures can help in the development of appropriate interventions to reduce prevalence. Highlights We examined the role of pelvis and lower extremity during trunk flexion-extension. Greater lumbar flexion was observed in the lower extremity constrained condition. Later flexion-relaxation was observed in the lower extremity constrained condition. Greater EMG in low back was observed in the lower extremity constraints condition. A complementary interaction between trunk and lower extremity exists.

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Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

A systems-level perspective of the biomechanics of the trunk flexion-extension movement: Part I – Normal low back condition

Jin

Mirka

2015

International Journal of Industrial Ergonomics

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“…This splinting is commonly seen in acute pain situations, acting as an initial protective measure in order to prevent further damage to the injured area and promote initial healing (McGorry & Lin, 2012), by limiting extreme movements (Lund, Donga, Widmer, & Stohler, 1991;Sihvonen, 1997). The biological splint, is commonly attributed to neuromuscular or physiological changes occurring with the onset of pain perception .…”

Section: Biopsychosocial Modelmentioning

confidence: 99%

The efficacy of surface electromyographic biofeedback assisted stretching for the treatment of chronic low back pain: A case-series

Moore

Mannion

Moran

2015

Journal of Bodywork and Movement Therapies

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“…Some studies have demonstrated flexion-relaxation in the hamstrings at the end of forward bending. 203 McGorry found that it varied 204 between individuals and in restrained or free standing postures. In the extension/lifting phase, hamstrings were recruited first indicating that pelvic motion leads the movement of trunk extension.…”

Section: Liftingmentioning

confidence: 99%

Salient aspects of normal function of the torso

Key¹

2010

Back Pain - A Movement Problem

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Flexion relaxation of the hamstring muscles during lumbar-pelvic rhythm

Cited by 63 publications

References 13 publications

A systems-level perspective of the biomechanics of the trunk flexion-extension movement: Part I – Normal low back condition

A systems-level perspective of the biomechanics of the trunk flexion-extension movement: Part I – Normal low back condition

The efficacy of surface electromyographic biofeedback assisted stretching for the treatment of chronic low back pain: A case-series

Salient aspects of normal function of the torso

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