Effects of lumbar extensor fatigue and surface inclination on postural control during quiet stance

Lin, Dingding; Nussbaum, Maury A.

doi:10.1016/j.apergo.2012.02.003

Cited by 19 publications

(17 citation statements)

References 45 publications

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“…placing a load on 30" shelf height) most of the leg muscles are under high stress [20].Moreover, DiDomenico [10] concluded that bent at waist, squatting, and kneeling were reported to produce threat to stability among construction workers. Additionally, Lin [28] studied the effects of lumbar extensor stress, and surface inclination on postural control during erect standing. The results showed that stress of lumbar extensor highly affected postural stability.…”

Section: Discussionmentioning

confidence: 99%

Center of Mass Deviation from Center of Base of Support as a Measure of Frontal and Sagittal Stability

Alamoudi¹,

Stambolian²,

Asfour³

2016

IJBES

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Section: Discussionmentioning

confidence: 99%

Center of Mass Deviation from Center of Base of Support as a Measure of Frontal and Sagittal Stability

Alamoudi¹,

Stambolian²,

Asfour³

2016

IJBES

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“…An inclined work surface introduces a higher risk of slipping due to increased ground shear forces and reduced ground compression forces (Zhao et al, 1987). Previous studies have shown that standing on inclined surfaces could reduce standing stability (Bhattacharya et al, 2002/2003; Lin and Nussbaum, 2012; Simeonov et al, 2003, 2009) and may cause changes to body postures and lower extremity biomechanics (Mezzarane and Kohn, 2007; Sasagawa and Ushiyama, 2009). When walking on inclined surfaces, the pattern of walking as well as lower extremity biomechanics will also be altered (in comparison to walking on flat ground) in order to compensate for the increased risk of slip and fall (Leroux et al, 2002; McIntosh et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of postural sway and impact forces during ingress and egress of scissor lifts at elevations

et al. 2017

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Workers are at risk when entering or exiting elevated scissor lifts. In this study, we recorded ground shear forces and postural instability from 22 construction workers while they performed ingress and egress between a scissor lift and an adjacent work surface with varying lift gate opening designs, horizontal and vertical gaps, and sloped work surfaces. From the results of this study, we observed higher peak ground shear forces when using a bar-and-chain opening, with larger horizontal gap, with the lift surface more than 8 inches below the work surface, and having a sloped (26 degrees) work surface. Similar trends were observed for postural instability except the influence of vertical distance was not significant. To reduce slip/trip/fall risk and postural instability of workers while entering or exiting an elevated scissor lift, we suggest scissor lifts be equipped with a gate-type opening to replace the bar-and-chain design. We also suggest the lift surface be placed no more than 0.2 m lower than the work surface and the horizontal gap is as small as possible. Selecting a non-sloped surface to exit or enter a scissor lift is also desirable.

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“…Several previous studies report some evidence that muscular fatigue in the lower limbs may cause impaired postural control, which increases propensity for falls (Yaggie and McGregor, 2002; Gribble et al, 2004; Mademli et al, 2008; Lin et al, 2009, 2012). Muscular fatigue of the lower limbs may affect body kinematics during a process of regaining balance (Mangharam 1998, 1999; Mademli et al, 2008) and gait parameters associated with slip propensity (Parijat and Lockhart, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…In these previous studies, small inclination angles were used (2.5–14°) and no multiple fall risk factors were investigated concurrently. To the authors’ knowledge, only one relevant study (Lin and Nussbaum, 2012) has been conducted to investigate the effect of muscle fatigue (i.e., a potential fall risk factor) on balance control while standing on steeper inclined surfaces (up to 26°). The goal of this previous study, however, was to examine the interactive effect of the lumbar extensor and inclination on balance control.…”

Section: Introductionmentioning

confidence: 99%

Muscular activity of lower limb muscles associated with working on inclined surfaces

Kincl

Lowe

et al. 2014

Ergonomics

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This study investigated effects of visual cues, muscular fatigue, task performance and experience of working on inclined surfaces on activity of postural muscles in the lower limbs associated with maintaining balance on three inclined surfaces—0°, 14° and 26°. Normalized electromyographic (NEMG) data were collected on 44 professional roofers bilaterally from the rectus femoris, biceps femoris, tibialii anterior, and gastrocnemii medial muscle groups. The 50th and 95th percentile normalized EMG amplitudes were used as EMG variables. Results showed that inclination angle and task performance caused a significant increase in the NEMG amplitudes of all postural muscles. Visual cues were significantly associated with a decrease in the 95th percentile EMG amplitude for the right gastrocnemius medial and tibialis anterior. Fatigue was related to a significant decrease in the NEMG amplitude for the rectus femoris. Experience of working on inclined surfaces did not have a significant effect on the NEMG amplitude.

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Effects of lumbar extensor fatigue and surface inclination on postural control during quiet stance

Cited by 19 publications

References 45 publications

Center of Mass Deviation from Center of Base of Support as a Measure of Frontal and Sagittal Stability

Center of Mass Deviation from Center of Base of Support as a Measure of Frontal and Sagittal Stability

Evaluation of postural sway and impact forces during ingress and egress of scissor lifts at elevations

Muscular activity of lower limb muscles associated with working on inclined surfaces

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