Relevance of lactate level detection in migrane and fibromyalgia

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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Effect of workshops for coaches on the motor ability of balance in children practicing sports in late childhood

BMC Sports Science Medicine and Rehabilitation ◽

10.1186/s13102-021-00388-9 ◽

2021 ◽

Vol 13 (1) ◽

Author(s):

D. Wilczyńska ◽

A. Łysak-Radomska ◽

M. Podczarska-Głowacka ◽

K. Krasowska ◽

E. Perzanowska ◽

...

Keyword(s):

Vestibular System ◽

Postural Stability ◽

Motor Coordination ◽

Stability Index ◽

Control Group ◽

Eyes Closed ◽

Significant Difference ◽

And Control ◽

Experimental Group ◽

Balance Stability

Abstract Background The coach attitude impacts the whole mind and body system of a child athlete from emotional and motivational aspects to motor skills like motor coordination. It translates into the ability to control and stabilize posture. The vestibular system plays an important role in this regulation. This system, next to the visual system and mechanoreceptors, is responsible for balance and control during posture transition. Moreover, the vestibular system is influenced by emotional factors. Therefore the authors of this study focused on the changes in the balance stability of children practicing sport after the implementation of the psychological workshops for coaches. Methods Fifty-nine children at the age of 9–12 practicing soccer, art gymnastic and sport gymnastic were divided into two groups. The experimental group consisted of 31 participants and 28 in the control group. Experimental group children were under the influence of the 3 coaches who attended three workshops over 12 weeks period. Control group children were coached by 5 coaches who attended no workshops. Postural stability tests were performed on children before and after the workshops. Results The statistically significant changes were observed in selected parameters of children’s balance stability after the experiment. The significant difference between the experimental and control group in Overall Stability Index (OSI) (p < 0.0002), Anterior–Posterior Stability Index (AP) (p < 0.01), Medial–Lateral Stability Index (ML) (p < 0.01) with eyes open were observed after the experiment. The results show a significant deterioration in control group contrary to the experimental group where the improvement trend was observed. Moreover, the difference between the groups was observed in OSI parameter (p < 0.005) with eyes closed after the experiment. Conclusion The results obtained by the authors of the current study may support the thesis that educating coaches allows for better results in postural stability of child’s athletes. Nevertheless, this thesis requires further research, with particular emphasis on the age and gender of young athletes.

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Postural Balance Ability and the Effect of Visual Restriction on Older Dancers and Non-Dancers

Frontiers in Sports and Active Living ◽

10.3389/fspor.2021.707567 ◽

2021 ◽

Vol 3 ◽

Author(s):

Maria-Elissavet Nikolaidou ◽

Vasilios Karfis ◽

Maria Koutsouba ◽

Arno Schroll ◽

Adamantios Arampatzis

Keyword(s):

Repeated Measures ◽

Postural Balance ◽

Path Length ◽

Performance Test ◽

Control Group ◽

Quiet Stance ◽

Balance Performance ◽

Visual Channel ◽

Eyes Closed ◽

Eyes Open

Dance has been suggested to be an advantageous exercise modality for improving postural balance performance and reducing the risk of falls in the older population. The main purpose of this study was to investigate whether visual restriction impacts older dancers and non-dancers differently during a quiet stance balance performance test. We hypothesized higher balance performance and greater balance deterioration due to visual restriction in dancers compared with non-dancers, indicating the superior contribution of the visual channel in the expected higher balance performances of dancers. Sixty-nine (38 men, 31 women, 74 ± 6 years) healthy older adults participated and were grouped into a Greek traditional dance group (n = 31, two to three times/week for 1.5 h/session, minimum of 3 years) and a non-dancer control group (n = 38, no systematic exercise history). The participants completed an assessment of one-legged quiet stance trials using both left and right legs and with eyes open while standing barefoot on a force plate (Wii, A/D converter, 1,000 Hz; Biovision) and two-legged trials with both eyes open and closed. The possible differences in the anthropometric and one-legged balance parameters were examined by a univariate ANOVA with group and sex as fixed factors. This ANOVA was performed using the same fixed factors and vision as the repeated measures factor for the two-legged balance parameters. In the one-legged task, the dance group showed significantly lower values in anteroposterior and mediolateral sway amplitudes (p = 0.001 and p = 0.035) and path length measured in both directions (p = 0.001) compared with the non-dancers. In the two-legged stance, we found a significant vision effect on path length (p < 0.001) and anteroposterior amplitude (p < 0.001), whereas mediolateral amplitude did not differ significantly (p = 0.439) between closed and open eyes. The dance group had a significantly lower CoP path length (p = 0.006) and anteroposterior (p = 0.001) and mediolateral sway amplitudes (p = 0.003) both in the eyes-open and eyes-closed trials compared with the control group. The superior balance performance in the two postural tasks found in the dancers is possibly the result of the coordinated, aesthetically oriented intersegmental movements, including alternations between one- and two-legged stance phases, that comes with dance. Visual restriction resulted in a similar deterioration of balance performance in both groups, thus suggesting that the contribution of the visual channel alone cannot explain the superior balance performance of dancers.

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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 Effect of Osteopathic Manipulative Treatment on Proprioception in Adults: A Pilot Study

The AAO Journal ◽

10.53702/2375-5717-30.4.11 ◽

2020 ◽

Vol 30 (4) ◽

pp. 11-19

Author(s):

Krista Hoevemeyer ◽

Kai Yuan Teng ◽

Thomas Mehner ◽

Ryan McMunn ◽

Jose Figueroa ◽

...

Keyword(s):

Treatment Group ◽

Repeated Measures ◽

Fixed Effects ◽

Path Length ◽

Average Velocity ◽

The Body ◽

Control Group ◽

Osteopathic Manipulative Treatment ◽

Eyes Closed ◽

Eyes Open

Abstract Introduction: This study aims to investigate if proprioception is the mechanism through which osteopathic manipulative treatment (OMT) corrects somatic dysfunctions. OMT focuses on resolving structural asymmetry in the body that may interfere with physiologic function, including proprioception. Multiple theories have been proposed regarding the physiologic mechanisms of OMT and the effect on proprioception, with few studies objectively establishing a connection. Hypothesis: Significant change in measurements of proprioception was expected in the treatment group (OMT) over the 4-week period. Methods: For the study, 35 adults recruited from the Des Moines University community were randomized equally into treatment and control groups. For 3 weeks, the treatment group received weekly osteopathic structural exams (OSE) and OMT, while the control group underwent the same OSE but without treatment. Proprioception was assessed using force plate measurements collected during two-leg and single-leg tests prior to the first intervention, immediately after the first intervention, and 1 week after last intervention. Measurements included anterior-posterior sway, medial-lateral sway, average velocity, area, path length and time, which were analyzed with a linear model of mixed effects for repeated measures to account for the fixed effects (time and treatments), interaction effects and the random subject effects. Results: Over the 4-week period, significant differences were found for 4 measurements: two-leg eyes-open-path-length (p=0.0342), two-leg eyes-open-average-velocity (p=0.0334), single-right-leg eyes-open-average-velocity (p=0.0145), and single-right-leg eyes-closed-medial-lateral-sway (p=0.0488). Conclusion: Certain measurements of proprioception changed in an adult population over a 4-week course with 3 weekly OMT treatments. These results indicate OMT may be altering proprioception through the correction of somatic dysfunctions. Our results suggest a need for further research investigating the effects of OMT on proprioception in symptomatic populations and larger sample sizes.

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Effects of 2 Intersection Strategies for Physical Recovery in Jiu-Jitsu Athletes

International Journal of Sports Physiology and Performance ◽

10.1123/ijspp.2019-0701 ◽

2020 ◽

pp. 1-6

Author(s):

Eurico P. César ◽

Cleito S.R. Júnior ◽

Raphael N. Francisco

Keyword(s):

Grip Strength ◽

Blood Lactate ◽

Handgrip Strength ◽

Lactate Concentration ◽

Blood Lactate Concentration ◽

Strength Test ◽

Time Effect ◽

Control Group ◽

Lactate Levels ◽

Blood Lactate Levels

Purpose: To compare the effect of static stretching (SS) and cold-water immersion (CWI) on strength performance and blood lactate levels of jiu-jitsu athletes. Methods: A total of 21 male Brazilian jiu-jitsu fighters were randomly assigned to SS (9 × 30-s carpal extension), CWI (3 × 3 min at 10°C), or a control group (CG); their maximal handgrip strength, handgrip muscle endurance, dynamic kimono grip strength test, and blood lactate concentration were assessed before and after a simulated Brazilian jiu-jitsu fight and after one of the recovery interventions. Results: There was an interaction (F = 9.075; P = .002) and a time effect (F = 11.792; P = .003) for dynamic kimono grip strength test, showing a decrease in performance for the CG (P = .0001; effect size [ES] = 0.52, moderate) and after SS (P = .006; ES = 0.43, small). There was an interaction (F = 3.592; P = .015) and a time effect (F = 122.631; P = .0001) for blood lactate concentration, showing lower levels after CWI versus CG (P = .028; ES = 0.93, moderate) and after CWI versus SS (P = .042; ES = 0.82, moderate). There was an interaction (F = 9.617; P = .001) for handgrip strength, showing an impairment in performance after SS (P = .001; ES = 0.67, moderate). Conclusion: CWI promoted restoration of muscle strength and endurance and reduction in blood lactate levels after the simulated fight and can thus be used by jiu-jitsu athletes as a recovery strategy between fights.

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

Biomedical Human Kinetics ◽

10.1515/bhk-2015-0005 ◽

2015 ◽

Vol 7 (1) ◽

Cited By ~ 2

Author(s):

Aleksandra Truszczyńska ◽

Agnieszka Jarmuziewicz ◽

Justyna Drzał-Grabiec

Keyword(s):

Young Women ◽

Postural Stability ◽

Balance Control ◽

Control Group ◽

Stability Testing ◽

Eyes Closed ◽

Eyes Open ◽

The Mean ◽

Control Balance ◽

Positive Effect

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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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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Gender Differences in Postural Stability among 13-Year-Old Alpine Skiers

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17113859 ◽

2020 ◽

Vol 17 (11) ◽

pp. 3859 ◽

Cited By ~ 1

Author(s):

Agnieszka D. Jastrzębska

Keyword(s):

Gender Differences ◽

Postural Balance ◽

Lactate Concentration ◽

Blood Lactate Concentration ◽

Body Sway ◽

Foot Pressure ◽

Eyes Closed ◽

Before And After ◽

Eyes Open ◽

Alpine Skiers

This experiment examined changes in body sway after Wingate test (WAnT) in 19 adolescents practicing alpine skiing, subjected to the same type of training load for 4–5 years (10 girls and nine boys). The postural examinations were performed with eyes open (EO), eyes closed (EC), and sway reverenced vision (SRV) in the medial-lateral (ML) and anterior-posterior (AP) planes. The displacement of center of foot pressure (CoP), range of sway (RS), mean sway velocity (MV), way length, and surface area were measured in bipedal upright stance before and after the WAnT to assess the influence of fatigue on postural balance. There were no significant differences in WAnT parameters between girls and boys. Relative peak power (RPP), relative total work (RWtot) were (girls vs. boys) 8.89 ± 0.70 vs. 9.57 ± 1.22 W/kg, p < 0.05 and 227.91 ± 14.98 vs. 243.22 ± 30.24 W/kg, p < 0.05 respectively. The fatigue index (FI) was also on similar level in both genders; however, blood lactate concentration (BLa) was significantly higher in boys (10.35 ± 1.16 mM) than in girls (8.67 ± 1.35 mM) p = 0.007. In the EO examination, statistically significant differences between resting and fatigue conditions in the whole group and after the division into girls and boys were found. In fatigue conditions, significant gender differences were noted for measurements in the ML plane (sway path and RS) and RS in the AP plane. Comparison of the three conditions shows differences between EO vs. EC and SRV in AP plane measured parameters, and for RS in ML plane in rest condition in girls. The strong correlations between FI and CoP parameters mainly in ML plane in the whole group for all examination conditions were noted. By genders, mainly RS in ML plane strongly correlates with FI (r > 0.7). No correlation was found between BLa and CoP parameters (p > 0.06). The presented results indicate that subjecting adolescents of both genders to the same training may reduce gender differences in the postural balance ability at rest but not in fatigue conditions and that girls are significantly superior in postural balance in the ML plane than boys. It was also shown that too little or too much information may be destructive to postural balance in young adolescents.

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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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