Effect of participating in fitness classes on postural stability of young women

Summary Study aim: the aim of the study was to compare the postural stability and ability to control balance in active women who attend fitness classes versus inactive women. Material and methods: the study included 41 women who exercise regularly (mean age 28.64±5.26 years). The control group consisted of 42 women not engaged in regular physical activity (mean age 28.55±5.05 years). In each subject, postural stability testing was performed using the Stabilometric Platform CQStab2P (the 2-platform version). Authors analysed the mean, median and standard deviation for each parameter of the stabilogram and statokinesiogram. Results: for most of the studied parameters, the statistical analysis showed a positive effect of exercising on the level of fitness compared to the control group, for both the test with eyes open and the test with eyes closed. Conclusions: attending fitness classes significantly affects postural stability and balance control in young women, and leads to lesser dependence on sight to maintain it.

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Quantification of Trunk Postural Stability Using Convex Polyhedron of the Time-Series Accelerometer Data

Journal of Healthcare Engineering ◽

10.1155/2016/1621562 ◽

2016 ◽

Vol 2016 ◽

pp. 1-9 ◽

Cited By ~ 5

Author(s):

Roman Melecky ◽

Vladimir Socha ◽

Patrik Kutilek ◽

Lenka Hanakova ◽

Peter Takac ◽

...

Keyword(s):

Postural Stability ◽

Convex Polyhedron ◽

Human Movement ◽

Control Group ◽

Accelerometer Data ◽

Eyes Closed ◽

Significant Difference ◽

Eyes Open ◽

Novel Method ◽

Well Correlation

Techniques to quantify postural stability usually rely on the evaluation of only two variables, that is, two coordinates of COP. However, by using three variables, that is, three components of acceleration vector, it is possible to describe human movement more precisely. For this purpose, a single three-axis accelerometer was used, making it possible to evaluate 3D movement by use of a novel method, convex polyhedron (CP), together with a traditional method, based on area of the confidence ellipse (ACE). Ten patients (Pts) with cerebellar ataxia and eleven healthy individuals of control group (CG) participated in the study. The results show a significant increase of volume of the CP (CPV) in Pts or CG standing on foam surface with eyes open (EO) and eyes closed (EC) after the EC phase. Significant difference between Pts and CG was found in all cases as well. Correlation coefficient indicates strong correlation between the CPV and ACE in most cases of patient examinations, thus confirming the possibility of quantification of postural instability by the introduced method of CPV.

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The Influence of Gender and Somatotype on Single-Leg Upright Standing Postural Stability in Children

Journal of Applied Biomechanics ◽

10.1123/jab.23.3.173 ◽

2007 ◽

Vol 23 (3) ◽

pp. 173-179 ◽

Cited By ~ 48

Author(s):

Alex J.Y. Lee ◽

Wei-Hsiu Lin

Keyword(s):

Body Weight ◽

Postural Stability ◽

Center Of Pressure ◽

Body Height ◽

Healthy Children ◽

Lower Body ◽

Eyes Closed ◽

Upright Standing ◽

Eyes Open ◽

The Mean

The purpose of this study was to investigate the influence of gender and somatotypes on single-leg upright standing postural stability in children. A total of 709 healthy children from different schools were recruited to measure the anthropometric somatotypes and the mean radius of center of pressure (COP) on a force platform with their eyes open and eyes closed. The results were that (a) girls revealed significantly smaller mean radius of COP distribution than boys, both in the eyes open and eyes closed conditions, and (b) the mesomorphic, muscular children had significantly smaller mean radius of COP distribution than the endomorphic, fatty children and the ectomorphic, linear children during the eyes closed condition. The explanation for gender differences might be due to the larger body weight in boys. The explanation for somatotype differences might be due to the significantly lower body height and higher portion of muscular profile in the mesomorphic children.

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The Effect of Boundary Shape and Minima Selection on Single Limb Stance Postural Stability

Journal of Applied Biomechanics ◽

10.1123/jab.28.5.608 ◽

2012 ◽

Vol 28 (5) ◽

pp. 608-615 ◽

Cited By ~ 2

Author(s):

Stephen C. Cobb ◽

Mukta N. Joshi ◽

David M. Bazett-Jones ◽

Jennifer E. Earl-Boehm

Keyword(s):

Postural Stability ◽

Rank Correlation ◽

Stability Limit ◽

Rank Test ◽

Test Results ◽

Absolute Time ◽

Boundary Shape ◽

Eyes Closed ◽

Eyes Open ◽

The Mean

The effect of time-to-boundary minima selection and stability limit definition was investigated during eyes open and eyes closed condition single-limb stance postural stability. Anteroposterior and mediolateral time-to-boundary were computed using the mean and standard deviation (SD) of all time-to-boundary minima during a trial, and the mean and SD of only the 10 absolute time-to-boundary minima. Time-to-boundary with rectangular, trapezoidal, and multisegmented polygon defined stability limits were also calculated. Spearman’s rank correlation coefficient test results revealed significant medium-large correlations between anteroposterior and mediolateral time-to-boundary scores calculated using both the mean and SD of the 10 absolute time-to-boundary minima and of all the time-to-boundary minima. Friedman test results revealed significant mediolateral time-to-boundary differences between boundary shape definitions. Follow-up Wilcoxon signed rank test results revealed significant differences between the rectangular boundary shape and both the trapezoidal and multisegmented polygon shapes during the eyes open and eyes closed conditions when both the mean and the SD of the time-to-boundary minima were used to represent postural stability. Significant differences were also revealed between the trapezoidal and multisegmented polygon definitions during the eyes open condition when the SD of the time-to-boundary minima was used to represent postural stability. Based on these findings, the overall results (i.e., stable versus unstable participants or groups) of studies computing postural stability using different minima selection can be compared. With respect to boundary shape, the trapezoid or multisegmented polygon shapes may be more appropriate than the rectangular shape as they more closely represent the anatomical shape of the stance foot.

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Ankylosing Spondylitis and Posture Control: The Role of Visual Input

BioMed Research International ◽

10.1155/2015/948674 ◽

2015 ◽

Vol 2015 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Alessandro Marco De Nunzio ◽

Salvatore Iervolino ◽

Carmela Zincarelli ◽

Luisa Di Gioia ◽

Giuseppe Rengo ◽

...

Keyword(s):

Ankylosing Spondylitis ◽

Balance Control ◽

Amplitude Spectrum ◽

Mean Amplitude ◽

Visual Input ◽

Quiet Stance ◽

Eyes Closed ◽

Increased Risk ◽

Eyes Open ◽

The Mean

Objectives. To assess the motor control during quiet stance in patients with established ankylosing spondylitis (AS) and to evaluate the effect of visual input on the maintenance of a quiet posture.Methods. 12 male AS patients (mean age 50.1 ± 13.2 years) and 12 matched healthy subjects performed 2 sessions of 3 trials in quiet stance, with eyes open (EO) and with eyes closed (EC) on a baropodometric platform. The oscillation of the centre of feet pressure (CoP) was acquired. Indices of stability and balance control were assessed by the sway path (SP) of the CoP, the frequency bandwidth (FB1) that includes the 80% of the area under the amplitude spectrum, the mean amplitude of the peaks (MP) of the sway density curve (SDC), and the mean distance (MD) between 2 peaks of the SDC.Results. In severe AS patients, the MD between two peaks of the SDC and the SP of the center of feet pressure were significantly higher than controls during both EO and EC conditions. The MP was significantly reduced just on EC.Conclusions. Ankylosing spondylitis exerts negative effect on postural stability, not compensable by visual inputs. Our findings may be useful in the rehabilitative management of the increased risk of falling in AS.

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IMMEDIATE EFFECT OF DIFFERENT FOREFOOT WEDGES ON STANDING STABILITY IN YOUNG ADULTS

Biomedical Engineering Applications Basis and Communications ◽

10.4015/s101623721850014x ◽

2018 ◽

Vol 30 (01) ◽

pp. 1850014

Author(s):

Chu-Fen Chang ◽

Hui-Ji Fan ◽

Hung-Bin Chen ◽

Houu-Wooi Lim ◽

Hsiao-Yuan Lee ◽

...

Keyword(s):

Young Adults ◽

Postural Stability ◽

Center Of Pressure ◽

Balance Control ◽

Random Sequence ◽

Force Plate ◽

Eyes Closed ◽

Eyes Open ◽

Arch Support ◽

Forward Falls

The aim of this study was to investigate the immediate effect of wearing the functional insoles with different slopes of forefoot wedges on postural stability in young adults during quiet stance. In this study, the functional insole was composed of a forefoot wedge and a medial arch support. Twelve healthy young adults (six males and six females) participated. Each subject wore sneakers with and without functional insole and stood as still as possible on a force plate with feet together, arms by side and head facing ahead for 60[Formula: see text]s, while eyes open and eyes closed, respectively. The functional insole was applied in the random sequence of no insole, wearing insole with a medial arch and a four-degree forefoot wedge, as well as wearing insole with a medial arch and an eight-degree forefoot wedge. The sway areas as well as the maximal excursions of the center of pressure (COP) in anterior–posterior (AP) and medial–lateral (ML) directions were used to evaluate the static postural stability. During stance with feet together and eyes closed, the sway area and maximal excursion of the COP in the AP direction were significantly decreased when wearing an eight-degree forefoot wedge functional insole. Since the reduced displacements of the COP indicated better postural control, it was suggested that the functional insole with an eight-degree forefoot wedge and a medial arch support might be beneficial to improve the postural stability in patients with impaired balance control, especially for whom having high risk of forward falls.

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Relevance of lactate level detection in migrane and fibromyalgia

European Journal of Translational Myology ◽

10.4081/ejtm.2019.8202 ◽

2019 ◽

Vol 29 (2) ◽

Author(s):

Patrizia Proia ◽

Alessandra Amato ◽

Valentina Contrò ◽

Alessandra Lo Monaco ◽

Jessica Brusa ◽

...

Keyword(s):

Postural Stability ◽

Path Length ◽

Lactate Concentration ◽

Control Group ◽

Eyes Closed ◽

Dynamic Coordination ◽

Eyes Open ◽

Lactate Levels ◽

And Control ◽

Blood Lactate Levels

The aim of this study was to determine the blood lactate levels in healthy and pathological subjects, particularly with migraine and fibromyalgia. Moreover we investigated the possible correlation between lactate concentration, postural stability and balance disorders; the composition of the groups were: migraine (n = 25; age 49.7 ± 12.5), fibromyalgia (n = 10; age 43.7 ± 21.2), control group (n = 16 age 28.52 ± 2.4). The results showed that patients with fibromyalgia (FG) had higher lactate levels compared to migraine (MG) and control group (CG) (mean ± sd: FG = 1.78 ± 0.9 mmol/L; MG = 1.45±1 mmol/L; CG = 0,85 ± 0,07 mmol/L). The same situation was highlighted about the sway path length with eyes closed (FG = 518 ± 195 mm; MG = 465 ± 165 mm; CG = 405 ± 94,72 mm) and with eyes open (FG = 430 ± 220 mm; MG = 411 ± 143 mm; CG = 389 ± 107 mm). This can be explained by the fact that energy-intensive postural strategies must be used to optimize both static and dynamic coordination, in particular with repeated contractions of tonic oxidative muscle cells responsible for postural control.

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The Influence of Proprioceptive Training with the Use of Virtual Reality on Postural Stability of Workers Working at Height

Sensors ◽

10.3390/s20133731 ◽

2020 ◽

Vol 20 (13) ◽

pp. 3731

Author(s):

Magdalena Cyma-Wejchenig ◽

Jacek Tarnas ◽

Katarzyna Marciniak ◽

Rafał Stemplewski

Keyword(s):

Virtual Reality ◽

Dual Task ◽

Postural Stability ◽

Center Of Pressure ◽

Force Plate ◽

Control Group ◽

Eyes Closed ◽

Proprioceptive Training ◽

Eyes Open ◽

The Impact

The aim of the study was to assess the impact of proprioceptive training with the use of virtual reality (VR) on the level of postural stability of high–altitude workers. Twenty-one men working at height were randomly assigned to the experimental group (EG) with training (n = 10) and control group (CG) without training (n = 11). Path length of the displacement of the center of pressure (COP) signal and its components in the anteroposterior and medial–lateral directions were measured with use of an AccuGaitTM force plate before and after intervention (6 weeks, 2 sessions × 30 min a week). Tests were performed at two different platform heights, with or without eyes open and with or without a dual task. Two–way ANOVA revealed statistically significant interaction effects for low–high threat, eyes open-eyes closed, and single task-dual task. Post-training values of average COP length were significantly lower in the EG than before training for all analyzed parameters. Based on these results, it can be concluded that the use of proprioceptive training with use of VR can support, or even replace, traditional methods of balance training.

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Stabilometric assessment of static balance and postural stability in multicanal vertigo post vestibular rehabilitation: a clinical case report

Research Society and Development ◽

10.33448/rsd-v10i11.10188 ◽

2021 ◽

Vol 10 (11) ◽

pp. e92101110188

Author(s):

Lucas Marques Fortunato ◽

Lucelia Luna Melo-Diaz

Keyword(s):

Case Report ◽

Postural Stability ◽

Vestibular Rehabilitation ◽

Rehabilitation Program ◽

Mean Deviation ◽

Static Balance ◽

Eyes Closed ◽

Significant Difference ◽

Eyes Open ◽

The Mean

Introduction: Multicanal vertigo is a rare disorder and vestibular rehabilitation is one of the treatment methods, aiming to stimulate the neuroplasticity of the central nervous system. Objective: To examine the effect of a vestibular rehabilitation program on static balance and postural stability in an individual with vertigo. Case report: Male patient, 58 years old, with clinical diagnosis of benign paroxysmal positional vertigo for 12 years, with frequent episodes of vertigo, loss of balance and falls. The assessment of balance and postural stability were performed using the Romberg test with eyes open and closed, on a S-Plate v.14 – Medicapteurs – France, force platform, analysing data at a risk of p<0.05 level. After the Epley´s Maneuver, the vestibular rehabilitation program was started. It consisted of Cawthorne-Cooksey vestibular exercises, the Brandt-Daroff modified maneuver, and the Norre´s vestibular habituation training, twice a week, for a total of 10 sessions. Results: The tests performed with eyes open, did not show a statistically significant difference between pre and post treatment. However, in the stabilometric analysis, the wave width, the mean deviation, and the mean speed in the anteroposterior (A/P) and latero-lateral (L/L) displacements in mm/s, as well as the postural stability for the eyes closed tests had a statistically significant improvement. Conclusion: Vestibular rehabilitation was effective in improving static balance and postural stability in this case report, scientifically corroborating the importance of the chosen rehabilitation method as a viable option for the treatment of peripheral vestibulopathy.

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Gait Stability Measurement by Using Average Entropy

Entropy ◽

10.3390/e23040412 ◽

2021 ◽

Vol 23 (4) ◽

pp. 412

Author(s):

Han-Ping Huang ◽

Chang Francis Hsu ◽

Yi-Chih Mao ◽

Long Hsu ◽

Sien Chi

Keyword(s):

Postural Stability ◽

Multiscale Entropy ◽

Gait Stability ◽

Eyes Closed ◽

Stride Interval ◽

Step Interval ◽

Stability Measurement ◽

Eyes Open ◽

Two Measures ◽

Better Than

Gait stability has been measured by using many entropy-based methods. However, the relation between the entropy values and gait stability is worth further investigation. A research reported that average entropy (AE), a measure of disorder, could measure the static standing postural stability better than multiscale entropy and entropy of entropy (EoE), two measures of complexity. This study tested the validity of AE in gait stability measurement from the viewpoint of the disorder. For comparison, another five disorders, the EoE, and two traditional metrics methods were, respectively, used to measure the degrees of disorder and complexity of 10 step interval (SPI) and 79 stride interval (SI) time series, individually. As a result, every one of the 10 participants exhibited a relatively high AE value of the SPI when walking with eyes closed and a relatively low AE value when walking with eyes open. Most of the AE values of the SI of the 53 diseased subjects were greater than those of the 26 healthy subjects. A maximal overall accuracy of AE in differentiating the healthy from the diseased was 91.1%. Similar features also exists on those 5 disorder measurements but do not exist on the EoE values. Nevertheless, the EoE versus AE plot of the SI also exhibits an inverted U relation, consistent with the hypothesis for physiologic signals.

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EEG Data Quality: Determinants and Impact in a Multicenter Study of Children, Adolescents, and Adults with Attention-Deficit/Hyperactivity Disorder (ADHD)

Brain Sciences ◽

10.3390/brainsci11020214 ◽

2021 ◽

Vol 11 (2) ◽

pp. 214

Author(s):

Anna Kaiser ◽

Pascal-M. Aggensteiner ◽

Martin Holtmann ◽

Andreas Fallgatter ◽

Marcel Romanos ◽

...

Keyword(s):

Data Quality ◽

Large Scale ◽

Linear Models ◽

Spectral Power ◽

Control Group ◽

Continuous Performance Task ◽

Related Data ◽

Eyes Closed ◽

Eeg Data ◽

Eyes Open

Electroencephalography (EEG) represents a widely established method for assessing altered and typically developing brain function. However, systematic studies on EEG data quality, its correlates, and consequences are scarce. To address this research gap, the current study focused on the percentage of artifact-free segments after standard EEG pre-processing as a data quality index. We analyzed participant-related and methodological influences, and validity by replicating landmark EEG effects. Further, effects of data quality on spectral power analyses beyond participant-related characteristics were explored. EEG data from a multicenter ADHD-cohort (age range 6 to 45 years), and a non-ADHD school-age control group were analyzed (ntotal = 305). Resting-state data during eyes open, and eyes closed conditions, and task-related data during a cued Continuous Performance Task (CPT) were collected. After pre-processing, general linear models, and stepwise regression models were fitted to the data. We found that EEG data quality was strongly related to demographic characteristics, but not to methodological factors. We were able to replicate maturational, task, and ADHD effects reported in the EEG literature, establishing a link with EEG-landmark effects. Furthermore, we showed that poor data quality significantly increases spectral power beyond effects of maturation and symptom severity. Taken together, the current results indicate that with a careful design and systematic quality control, informative large-scale multicenter trials characterizing neurophysiological mechanisms in neurodevelopmental disorders across the lifespan are feasible. Nevertheless, results are restricted to the limitations reported. Future work will clarify predictive value.

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