Static balance according to hip joint angle of unsupported leg during one-leg standing

Cha, Ju-Hyung; Kim, Jang-Joon; Ye, Jae-Gwan; Lee, Seul-Ji; Hong, Jeong-Mi; Choi, Hyun‐Kyu; Choi, Ho-Suk; Lee, Yun-Hee

doi:10.1589/jpts.29.931

Cited by 7 publications

(4 citation statements)

References 30 publications

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“…While maintaining postural stability depends on the vestibular system, proprioception receptors, and visual system, studies evaluating these three systems individually in balance tests have confirmed that the visual system is particularly crucial in influencing balance [ 34 ]. Cha et al showed that subjects’ center of gravity moved more when their eyes were closed than when they were open [ 35 ], whereas Rose [ 36 ] found a much larger center of gravity displacement when subjects stood one-legged with their eyes closed in comparison with that obtained in a stance with the eyes open. Static balance studies have also already shown comparable results.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of postural stability based on a force plate and inertial sensor during static balance measurements

Lee

Sun

2018

J Physiol Anthropol

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BackgroundPrevious research on balance mostly focused on the assessment, training, and improvements of balance through interventions. We investigated tools commonly used to study static balance. Differences in postural stability were analyzed using multiscale entropy (MSE) and feature analysis.MethodsA force plate and inertial sensor were used to collect acceleration and center-of-pressure (COP) nonlinear signals. MSE was also used to detect fractal correlations and assess the complexity of univariate data complexity. Fifteen healthy subjects participated in the experiments. Each stood on a force plate and wore a sensor while attempting to maintain postural stability for 30 s in four randomized experiments to evaluate their static balance via a copositive experiment with eyes open/closed and with standing on one foot or both feet. A Wilcoxon-signed rank test was used to confirm that the conditions were significant. Considering the effect of the assessment tools, the influence of the visual and lower limb systems on postural stability was assessed and the results from the inertial sensor and force plate experiments were compared.ResultsForce plate usage provided more accurate readings when completing static balance tasks based on the visual system, whereas an inertial sensor was preferred for lower-limb tasks. Further, the eyes-open-standing-on-one-foot case involved the highest complexity at the X, Y, and Z axes for acceleration and at the ML axis for COP compared with other conditions, from which the axial directions can be identified.ConclusionsThe findings suggested investigation of different evaluation tool choices that can be easily adapted to suit different needs. The results for the complexity index and traditional balance indicators were comparable in their implications on different conditions. We used MSE to determine the equipment that measures the postural stability performance. We attempted to generalize the applications of complexity index to tasks and training characteristics and explore different tools to obtain different results.Trial registrationThis study was approved by the Research Ethics Committee of National Taiwan University and classified as expedited on August 24, 2017. The committee is organized under and operates in accordance with Social and Behavioral Research Ethical Principles and Regulations of National Taiwan University and government laws and regulations.

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Section: Methodsmentioning

confidence: 99%

Evaluation of postural stability based on a force plate and inertial sensor during static balance measurements

Lee

Sun

2018

J Physiol Anthropol

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“…Factors such as age, body mass index (BMI), and muscle strength affect gait speed 11 . Moreover, 1-leg standing time (OLST) and the functional reach test are known as good indicators of balance function and are useful as tools for evaluating lower-limb function 12,13 . With regard to lower-limb alignment after THA, postoperative leg-length discrepancy and several offset differences are related to gait 14 .…”

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confidence: 99%

Contralateral Lower-Limb Functional Status Before Total Hip Arthroplasty

Ohmori

Kabata

Kajino

et al. 2021

Journal of Bone and Joint Surgery

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Background:Postoperative gait speed, especially comfortable gait speed, is an important factor for predicting function after total hip arthroplasty (THA). In this study, we examined factors related to gait speed, including preoperative lower and upper-limb functional parameters and postoperative lower-limb alignment. In addition, we examined factors related to postoperative good comfortable gait speed (≥1.34 m/s: one indicator of a good clinical outcome). The purpose of this study was to determine if better preoperative functional parameters had a positive effect on postoperative gait speed.Methods:This prospective case-control study included 91 patients with hip osteoarthritis who underwent unilateral THA. Patients who had undergone a prior hip surgical procedure or had Crowe type-3 and 4 hips, complications after THA, knee osteoarthritis-related pain, and severe lumbar conditions were excluded. The 1-leg standing time (OLST) and knee extensor strength of the operatively treated side and the contralateral side and the functional reach test were examined preoperatively and at 1 year postoperatively. The leg-length discrepancy and global offset compared with the contralateral side and leg lengthening were examined using 3-dimensional models captured through computed tomographic scans.Results:The preoperative contralateral side OLST was a significant factor (p < 0.001) for postoperative comfortable gait speed, and the preoperative contralateral-side knee extensor strength was a significant factor (p = 0.018) for postoperative maximum gait speed. Leg-length discrepancy and differences in global offset after THA were not significant factors for postoperative gait speed. The preoperative comfortable gait speed with a cutoff value of 1.115 m/s (area under the receiver operating characteristic curve, 0.690 [95% confidence interval, 0.569 to 0.810]; p = 0.003; sensitivity of 65.5% and specificity of 74.2%) was an independent factor associated with a good postoperative comfortable gait speed. Preoperative contralateral-side OLST was a significant factor (p = 0.027) for preoperative comfortable gait speed.Conclusions:The preoperative contralateral-side, lower-limb functional status is a significant factor for postoperative gait speed. Early surgical intervention before the contralateral-side function declines or a preoperative rehabilitation intervention on the contralateral side may improve THA outcome.Level of Evidence:Prognostic Level II. See Instructions for Authors for a complete description of levels of evidence.

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“…9 Furthermore, balance skills, including one-leg standing time (OLST), are known as good indicators of walking ability and are important for evaluating lower limb ability. 10 However, previous reports have not examined whether preoperative affected side or non-affected side performance was more important for postoperative walking ability. Only Ohmori et al 11 reported that preoperative non-affected side ability affected walking speed 1 year after THA, but it is unclear whether non-affected side ability is also important in early postoperative walking independence.…”

Section: Introductionmentioning

confidence: 98%

Association of affected and non-affected side ability with postoperative outcomes in patients undergoing total hip arthroplasty

Nozaki,

Nanri,

Kawabata

et al. 2023

HIP International

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Background: Although several reports have examined the association between preoperative function and postoperative outcomes in patients undergoing total hip arthroplasty (THA), it is unclear whether the ability of the affected or non-affected side particularly impacts on outcomes. We aimed to investigate the association between affected and non-affected side ability and walking independence. Methods: We prospectively enrolled 721 consecutive patients who underwent THA. Preoperatively, quadriceps isometric strength (QIS) and one-leg standing time (OLST) were measured. The endpoints were walking independence within 3, 5, 7, 10, and 14 days postoperatively. The associations between preoperative abilities and outcomes were examined using multivariate Cox hazard model, and the area under the curves (AUCs) for outcomes were compared. Results: We analysed 540 patients after excluding patients who met the exclusion criteria. Both affected and non-affected QIS predicted walking independence within 3 ( p = 0.006 and 0.001, respectively), 5, 7, 10, and 14 (both p < 0.001) days postoperatively. For OLST, only the affected side did not predict walking independence within 3 days postoperatively ( p = 0.154 and 0.012, respectively), and both sides did at days 5 ( p = 0.019 and <0.001, respectively), 7, 10, and 14 (both p < 0.001). The AUCs of the non-affected side ability for walking independence were significantly greater than those of the affected side on postoperative days 3 (0.66 vs. 0.73; p = 0.021) and 5 (0.67 vs. 0.71; p = 0.040), with no significant difference after day 7. Conclusions: Both sides abilities were associated with walking independence after THA, but non-affected side was found to be particularly crucial for early walking independence.

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Static balance according to hip joint angle of unsupported leg during one-leg standing

Cited by 7 publications

References 30 publications

Evaluation of postural stability based on a force plate and inertial sensor during static balance measurements

Evaluation of postural stability based on a force plate and inertial sensor during static balance measurements

Contralateral Lower-Limb Functional Status Before Total Hip Arthroplasty

Association of affected and non-affected side ability with postoperative outcomes in patients undergoing total hip arthroplasty

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