Trunk-pelvic coordination during unstable sitting with varying task demand: A methodological study

Acasio, Julian C.; Nussbaum, Maury A.; Hendershot, Brad D.

doi:10.1016/j.jbiomech.2021.110299

Cited by 5 publications

(9 citation statements)

References 13 publications

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“…Most studies ( n = 25/40) used an unstable seat that attached to part of a hemisphere (LBP data: n = 8 [ 19 , 22 , 30 , 31 , 33 , 35 , 73 , 74 ]; only pain-free data: n = 17 [ 21 , 25 – 28 , 77 – 80 , 85 – 90 , 92 , 93 ]). Other studies ( n = 15/40) used an unstable chair that attached to four springs moving about a pivot (LBP data: n = 7 [ 24 , 29 , 32 , 34 , 72 , 75 , 76 ]; only pain-free data: n = 8 [ 23 , 81 – 84 , 91 , 94 , 95 ]). Seat characteristics differed between studies.…”

Section: Resultsmentioning

confidence: 99%

“…For the springs-base seat, the distance of springs from the pivot in percentage ranged from 43.5–100%. Some studies ( n = 11/40) used multiple levels of seat instability [ 21 , 22 , 25 , 27 , 72 , 73 , 77 , 81 , 91 , 92 , 94 ]. Most studies ( n = 34/40) attached a foot plate to the seat to maintain knee flexion at 90° [ 19 , 21 – 24 , 26 , 28 – 35 , 72 – 86 , 89 , 91 , 93 – 95 ].…”

Section: Resultsmentioning

confidence: 99%

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Trunk postural control during unstable sitting among individuals with and without low back pain: A systematic review with an individual participant data meta-analysis

Alshehri,

Alzahrani,

van den Hoorn

et al. 2024

PLoS ONE

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Introduction Sitting on an unstable surface is a common paradigm to investigate trunk postural control among individuals with low back pain (LBP), by minimizing the influence lower extremities on balance control. Outcomes of many small studies are inconsistent (e.g., some find differences between groups while others do not), potentially due to confounding factors such as age, sex, body mass index [BMI], or clinical presentations. We conducted a systematic review with an individual participant data (IPD) meta-analysis to investigate whether trunk postural control differs between those with and without LBP, and whether the difference between groups is impacted by vision and potential confounding factors. Methods We completed this review according to PRISMA-IPD guidelines. The literature was screened (up to 7th September 2023) from five electronic databases: MEDLINE, CINAHL, Embase, Scopus, and Web of Science Core Collection. Outcome measures were extracted that describe unstable seat movements, specifically centre of pressure or seat angle. Our main analyses included: 1) a two-stage IPD meta-analysis to assess the difference between groups and their interaction with age, sex, BMI, and vision on trunk postural control; 2) and a two-stage IPD meta-regression to determine the effects of LBP clinical features (pain intensity, disability, pain catastrophizing, and fear-avoidance beliefs) on trunk postural control. Results Forty studies (1,821 participants) were included for the descriptive analysis and 24 studies (1,050 participants) were included for the IPD analysis. IPD meta-analyses revealed three main findings: (a) trunk postural control was worse (higher root mean square displacement [RMSdispl], range, and long-term diffusion; lower mean power frequency) among individuals with than without LBP; (b) trunk postural control deteriorated more (higher RMSdispl, short- and long-term diffusion) among individuals with than without LBP when vision was removed; and (c) older age and higher BMI had greater adverse impacts on trunk postural control (higher short-term diffusion; longer time and distance coordinates of the critical point) among individuals with than without LBP. IPD meta-regressions indicated no associations between the limited LBP clinical features that could be considered and trunk postural control. Conclusion Trunk postural control appears to be inferior among individuals with LBP, which was indicated by increased seat movements and some evidence of trunk stiffening. These findings are likely explained by delayed or less accurate corrective responses. Systematic review registration This review has been registered in PROSPERO (registration number: CRD42021124658).

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Trunk postural control during unstable sitting among individuals with and without low back pain: A systematic review with an individual participant data meta-analysis

Alshehri,

Alzahrani,

van den Hoorn

et al. 2024

PLoS ONE

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“…It is quantitatively evaluated by vector coding and relative phase analysis (Wheat and Glazier, 2006). Some studies refer to the interrelation of multiple elements as coordination, which is synonymous with coupling (Tepavac and Field-Fote, 2001;Abbasi et al, 2020;Acasio et al, 2021). However, coupling is different from biomechanical coordination.…”

Section: Interrelation Of Multiple Elementsmentioning

confidence: 99%

Clarifying the Biomechanical Concept of Coordination Through Comparison With Coordination in Motor Control

Kimura

Yokozawa

Ozaki

2021

Front. Sports Act. Living

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Coordination is a multidisciplinary concept in human movement science, particularly in the field of biomechanics and motor control. However, the term is not used synonymously by researchers and has substantially different meanings depending on the studies. Therefore, it is necessary to clarify the meaning of coordination to avoid confusion. The meaning of coordination in motor control from computational and ecological perspectives has been clarified, and the meanings differed between them. However, in biomechanics, each study has defined the meaning of the term and the meanings are diverse, and no study has attempted to bring together the diversity of the meanings of the term. Therefore, the purpose of this study is to provide a summary of the different meanings of coordination across the theoretical landscape and clarify the meaning of coordination in biomechanics. We showed that in biomechanics, coordination generally means the relation between elements that act toward the achievement of a motor task, which we call biomechanical coordination. We also showed that the term coordination used in computational and ecological perspectives has two different meanings, respectively. Each one had some similarities with biomechanical coordination. The findings of this study lead to an accurate understanding of the concept of coordination, which would help researchers formulate their empirical arguments for coordination in a more transparent manner. It would allow for accurate interpretation of data and theory development. By comprehensively providing multiple perspectives on coordination, this study intends to promote coordination studies in biomechanics.

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“…A potential mechanism which is associated with lower back pain is known as insufficient lumbar stability [1], reduced proprioception, which causing the impaired postural control [2]. Trunk postural control is often assessed when using unstable seats to perform the sitting tasks [3]. The larger centerof-pressure while sitting on unstable seat indicates the poorer postural control [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Trunk postural control is often assessed when using unstable seats to perform the sitting tasks [3]. The larger centerof-pressure while sitting on unstable seat indicates the poorer postural control [3,4]. Balance control is a leading component of human every day motor activities such as standing, walking or sitting and its impairment is associated with an increased risk of falling [5,6], functional independence [6], lower back pain due to impaired motor control mechanism.…”

Section: Introductionmentioning

confidence: 99%

Cortical activity, kinematics and trunk muscles activity response to pelvis movements during unstable sitting

Aleknaitė-Dambrauskienė¹,

Domeika²

2021

THC

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BACKGROUND: Balance control is a leading component of human motor activities and its impairment is associated with an increased risk of falling, lower back pain due to impaired motor control mechanism. Prolonged sitting position at workplace is one of the risk factors of reduced postural control and lower back pain. OBJECTIVE: To evaluate theta and alpha waves cortical activity, trunk muscles activity and kinematics in static sitting, dynamic sitting on different platforms: simple wobble board (WB) and wobble board on bearing surface (WBB). METHODS: The kinematics of body segments, electromyography of five trunk muscles, electroencephalography of 32 scalp electrodes were measured during balance tasks in sitting position for 17 subjects with continuous seated position at workplace. RESULTS: Cortical power on WBB1 increase in fronto – central (p< 0.05) region while on WBB2 increase in centro – parietal region (p< 0.05). WBB2 increase more muscles compared with WB2. The amplitude of movement of ASIS, Th10 can be seen lower on WBB compared with WB (p< 0.05). CONCLUSIONS: The study shows that WBB can increase personalized sitting and improve trunk motor control during hours of prolonged sitting.

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Trunk-pelvic coordination during unstable sitting with varying task demand: A methodological study

Cited by 5 publications

References 13 publications

Trunk postural control during unstable sitting among individuals with and without low back pain: A systematic review with an individual participant data meta-analysis

Trunk postural control during unstable sitting among individuals with and without low back pain: A systematic review with an individual participant data meta-analysis

Clarifying the Biomechanical Concept of Coordination Through Comparison With Coordination in Motor Control

Cortical activity, kinematics and trunk muscles activity response to pelvis movements during unstable sitting

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