Flexion relaxation of erector spinae response to spinal shrinkage

Xin-hai, Shan; Zhang, Yanbing; Zhang, Tailai; Chen, Zhentao; Wei, Yugang

doi:10.1016/j.jelekin.2011.12.011

Cited by 16 publications

(21 citation statements)

References 42 publications

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“…Stature shrinkage was quantified through a precision stadiometer as described in a publication [4]. The customized stadiometer consisted of a wooden frame which was tilted 15 degree backwards to the vertical line.…”

Section: Stature Shrinkage Measurementsmentioning

confidence: 99%

“…The customized stadiometer consisted of a wooden frame which was tilted 15 degree backwards to the vertical line. An adjustable support was used for cervical, lumbar spine and lower extremities to keep a comfortable as well as a repeatable resting position [4,28,29]. During the measurements, the participants were required to stand with knee straight, to put the feet comfortably to evenly distribute the body weight and to lean back against posture supports.…”

Section: Stature Shrinkage Measurementsmentioning

confidence: 99%

“…Unnecessary movements of the head were controlled through a soft cushion under the head together with a lateral wooden guide [29]. Through maintaining the eyesight at the mark 6 m away horizontally [4] head's vertical and horizontal alignment was reached.…”

Section: Stature Shrinkage Measurementsmentioning

confidence: 99%

“…The shrinkage is a decrease of the discs' thickness and the spinal column's length. It is thought that the shrinkage is linked to the bulging of annulus fibrosus in diameter as well as a fluid loss from the intervertebral disc (IVD) in lumbar [1][2][3][4] in parallel with an increased and/or abnormal loading on other spinal tissues, such as facet joints [5][6][7][8]. It is suggested that the test of spinal shrinkage could result in an effective predictor of spinal load [5,9].…”

Section: Introductionmentioning

confidence: 99%

“…It has been well accepted that the spinal shrinkage could be elicited by dynamical loading in sports activities, such as running [24] jumping [15] or by static spinal loading [4,25]. It is also shown that the spinal shrinkage could be affected by body mass [25], or a pregnant condition for women [9] but probably not by age [26].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Spinal Shrinkage Response to Shoulder Loading Posture

Sun¹,

Cheng²,

Xin-hai³

2018

J Ergonomics

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Section: Stature Shrinkage Measurementsmentioning

confidence: 99%

Section: Stature Shrinkage Measurementsmentioning

confidence: 99%

Section: Stature Shrinkage Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Spinal Shrinkage Response to Shoulder Loading Posture

Sun¹,

Cheng²,

Xin-hai³

2018

J Ergonomics

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Die Sache mit dem Dreh

Thaller¹,

Mathelitsch²

2013

Physik in unserer Zeit

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Für die Berechnung des Drehimpulses ist also die Kenntnis des Trägheitsmoments notwendig: I hängt wesentlich von der Form des Körpers und seiner Dichteverteilung ab. Für einfache homogene Körper wie Kugel, Zylinder, Quader findet man die entsprechenden Formeln in Physiklehrbüchern. Der menschliche Körper hat aber keine einfache Form, außerdem kann der Sportler während der Bewegung seine Körperhaltung und damit auch sein Trägheitsmoment ändern. Um diese verschiedenen Trägheitsmomente in den Griff zu bekommen, wurden zunächst viele Messungen an Leichen, sowohl ganzen Körpern als auch Körperteilen, vorgenommen. Der russische Biomechaniker Vladimir Zatsiorsky durchleuchtete dagegen lebende Probanden mit schwacher Gammastrahlung und maß so die Massenverteilung [1]. Tabelle 1 zeigt ausgewählte Beispiele. Aus der Fülle der bisher gemessenen Daten kann man mit einfachen Modellen die individuellen Trägheitsmomente einzelner Personen abschätzen. Man muss zum Beispiel nur Länge und Umfang eines Unterschenkels wissen und erhält Im Uhrzeigersinn v. l. unten n. r. unten: Simulierter Bewegungsablauf einer Scheindrehung in die Rückenlage [8]. Körperteil I lg / 10 -4 kg · m 2 I ml / 10 -4 kg · m 2 ABB . 2 SCHULTERG ELENK Gesamtmoment, Muskelmoment und Winkelgeschwindigkeit im Schultergelenk während der Scheindrehung in die Rückenlage [8].

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Low back pain development response to sustained trunk axial twisting

et al. 2013

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PurposeTo investigate if there is an effect of sustained trunk axial twisting on the development of low back pain.MethodsSixteen male pain-free university students volunteered for this study. The trunk axial twisting was created by a torsion moment of 50 Nm for 10-min duration. The axial rotational creep was estimated by the transverse camera view directly on the top of the head. The visual analog scale in low back area was examined both in the initial and at the end of twisting. Each performed three trials of lumbar flexion–extension with the cycle of 5 s flexion and 5 s extension in standing before and after twisting. Surface electromyography from bilateral erector spinae muscles as well as trunk flexion performance was recorded synchronously in video camera. A one-way ANOVA with repeated measures was used to evaluate the effect of twist.ResultsThe results showed that there was a significant (p < 0.001) twist creep with rotational angle 10.5° as well as VAS increase with a mean value 45 mm. The erector spinae was active in a larger angle during flexion as well as extension after trunk axial twisting.ConclusionsSustained trunk axial twisting elicits significant trunk rotational creep. It causes the visual analog scale to have a significant increase, and causes erector spinae muscles to become active longer during anterior flexion as well as extension, which may be linked to the decrease of the tension ability of passive tissues in low back area, indicating a higher risk in developing low back pain.

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Flexion relaxation of erector spinae response to spinal shrinkage

Cited by 16 publications

References 42 publications

Spinal Shrinkage Response to Shoulder Loading Posture

Spinal Shrinkage Response to Shoulder Loading Posture

Die Sache mit dem Dreh

Low back pain development response to sustained trunk axial twisting

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