scholarly journals Stabilita stoja po únave brušných svalov

2016 ◽  
Vol 10 (1) ◽  
pp. 103-109
Author(s):  
Daniel Gurín ◽  
Jan Novotný
Keyword(s):  
Experimental Study ◽  
Stability Index ◽  
Abdominal Muscles ◽  
Stability Parameters ◽  
Balance System ◽  
Before And After ◽  
The Stability ◽  
Biodex Balance System

In the pilot experimental study eight men with an average age of 33.5 ± 3.64 years were tested. The probands were tested on the Biodex Balance System before and after the exercise of the abdominal muscles. Exercise was carried out to the subjectively perceived maximum. The file was deliberately composed of mentally and physically trained individuals. Evaluated was the stability index, the smaller the nominal value, the better the stability. After the workout stability parameters were significantly worse than before the exercise (p = 0.025). The fatigue of the abdominal muscles thus negatively affects the stability of the stand.

scholarly journals Y balance test has no correlation with the Stability Index of the Biodex Balance System

2017 ◽  
Vol 27 ◽  
pp. 1-6 ◽  
Author(s):  
Gabriel Peixoto Leão Almeida ◽  
Isabel Oliveira Monteiro ◽  
Débora Fortes Marizeiro ◽  
Laísa Braga Maia ◽  
Pedro Olavo de Paula Lima
Keyword(s):  
Stability Index ◽  
Balance Test ◽  
Balance System ◽  
The Stability ◽  
Biodex Balance System

Relationship between dynamic foot-ground contact area and balance impairments in adolescents with down syndrome

2021 ◽  
pp. 1-8
Author(s):  
Mohamed E. Khallaf ◽  
Eman Fayed ◽  
Radwa E. Sweif ◽  
Abdulkarem Alsalem
Keyword(s):  
Down Syndrome ◽  
Contact Area ◽  
Postural Stability ◽  
Stability Index ◽  
Ground Contact ◽  
Balance System ◽  
Pressure Sensitive ◽  
Foot Problems ◽  
Arch Index ◽  
Biodex Balance System

PURPOSE: Down Syndrome (DS) is characterized by intellectual disability, hypotonia, and joint laxity. Physical disability can be an additional problem and manifests as reduced lower limb muscle strength and impaired balance. The objectives of this study were to characterize DS dynamic foot-ground contact area and to study its relationship with balance impairment among adolescents with DS. METHODS: Twenty-eight children and adolescents with DS and 28 non-DS adolescents/children were matched for age and sex. The Oxford Ankle Foot Questionnaire (parents’ version) was used to measure disability related to ankle/foot problems in all subjects. A pressure-sensitive mat was used to assess the contact area and arch index. Also, a Biodex balance system was used for measuring postural stability. RESULTS: There were significant differences between both groups in all domains of the Oxford Ankle Foot Questionnaire, overall contact area, and arch index (p <  0.05). Overall postural stability index was significantly decreased in subjects with DS (p <  0.05). There was a nonsignificant correlation between contact area and postural stability (p >  0.05). CONCLUSION: Adolescents with DS exhibited larger mid-foot and forefoot contact areas with respect to non-DS matched children. Impairment of balance in adolescents with DS is a multifactorial problem not related to changes in the foot contact area.

scholarly journals The Effect of L-dopa on Postural Stability in Parkinson’s Disease Patients

2019 ◽  
Vol 9 (3) ◽  
pp. 409 ◽  
Author(s):  
Jacek Wilczyński ◽  
Natalia Habik
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Postural Stability ◽  
Health Sciences ◽  
Morning Dose ◽  
Stability Testing ◽  
Balance System ◽  
Before And After ◽  
Biodex Balance System ◽  
Stability Results

The aim of the study was to evaluate the effects of L-dopa on postural stability in Parkinson’s disease patients. In the study, we examined a group of 13 patients, members of the Parkinson’s Association. The majority of subjects were women: 8 (61.538%), while 5 (38.462%) were men. These were patients with advanced, idiopathic Parkinson’s disease. The study was performed at the Posturology Laboratory of the Faculty of Medicine and Health Sciences, UJK, Kielce (Poland). The duration of the illness was longer than 5 years. The daily L-dopa dose was between 600 and 1000 mg/d. Patients were tested for postural stability prior to taking the morning dose and again, 1 h after the 200-mg dose (Madopar 250 Tablets). The Biodex Balance System was applied in order to perform Postural Stability Testing. No statistically significant differences were found for the distribution of postural stability results before or after L-dopa administration. Nonetheless, it should be noted that all variables in the Postural Stability Test were slightly improved following L-dopa administration. The highest percentage (% Time in Zone) was noted in Zone A (the best), before (85.77%) and after L-dopa administration (95.23%). The highest % Time in Quadrant was in Quadrant IV (right posterior) both before (41.43%) and after L-dopa administration (49.54%). When comparing the distribution of postural stability variables before and after L-dopa administration, there were no significant differences between women and men.

scholarly journals Whole-Body–Vibration Training and Balance in Recreational Athletes With Chronic Ankle Instability

2018 ◽  
Vol 53 (4) ◽  
pp. 355-363 ◽  
Author(s):  
Rafael Sierra-Guzmán ◽  
Fernando Jiménez-Diaz ◽  
Carlos Ramírez ◽  
Paula Esteban ◽  
Javier Abián-Vicén
Keyword(s):  
Body Composition ◽  
Ankle Instability ◽  
Whole Body Vibration ◽  
Stability Index ◽  
Composite Score ◽  
Whole Body ◽  
Body Vibration ◽  
Recreational Athletes ◽  
Balance System ◽  
Biodex Balance System

Context:  Deficits in the propioceptive system of the ankle contribute to chronic ankle instability (CAI). Recently, whole-body–vibration (WBV) training has been introduced as a preventive and rehabilitative tool. Objective:  To evaluate how a 6-week WBV training program on an unstable surface affected balance and body composition in recreational athletes with CAI. Design:  Randomized controlled clinical trial. Setting:  Research laboratory. Patients or Other Participants:  Fifty recreational athletes with self-reported CAI were randomly assigned to a vibration (VIB), nonvibration (NVIB), or control group. Intervention(s):  The VIB and NVIB groups performed unilateral balance training on a BOSU 3 times weekly for 6 weeks. The VIB group trained on a vibration platform, and the NVIB group trained on the floor. Main Outcome Measure(s):  We assessed balance using the Biodex Balance System and the Star Excursion Balance Test (SEBT). Body composition was measured by dual-energy x-ray absorptiometry. Results:  After 6 weeks of training, improvements on the Biodex Balance System occurred only on the Overall Stability Index (P = .01) and Anterior-Posterior Stability Index (P = .03) in the VIB group. We observed better performance in the medial (P = .008) and posterolateral (P = .04) directions and composite score of the SEBT in the VIB group (P = .01) and in the medial (P &lt; .001), posteromedial (P = .002), and posterolateral (P = .03) directions and composite score of the SEBT in the NVIB group (P &lt; .001). No changes in body composition were found for any of the groups. Conclusions:  Only the VIB group showed improvements on the Biodex Balance System, whereas the VIB and NVIB groups displayed better performance on the SEBT.

The Constitution of Rubber According to Its Swelling in Liquids

1930 ◽  
Vol 3 (4) ◽  
pp. 576-585
Author(s):  
Paul Bary
Keyword(s):  
Experimental Study ◽  
Vapor Pressure ◽  
Saturated Vapor ◽  
Point Of View ◽  
Single Sample ◽  
Saturation Point ◽  
Liquid Solutions ◽  
Before And After ◽  
The Stability

Abstract In various publications we have previously shown that in many cases it is advantageous to consider jellies as formed of a polymerized colloidal substance, the length of the molecular chains being easily changed according to the conditions of the system and unlike one another at all times in a single sample. These chains retain free affinities at their extremities to which can be linked so-called solvating groups arising from the solvent or from soluble substances contained in the jelly. The present work refutes the interpretation given to recent experiments on the vapor pressure of jellies and confirms in certain new ways this constitution. (1) The experiments of Stamberger on the vapor pressure of rubber jellies and their consistency before and after a prolonged mastication do not support the Harries hypothesis on the stability of the rubber molecule, but merely show that the theory of true liquid solutions is not applicable to jellies. (2) Based on the idea that polymerization changes with solvation, it is easily shown that the relative swelling in a solvent and in its saturated vapor are not contradictory with the principles of thermodynamics, as it would seem, but on the contrary proceed normally and could have been predicted. (3) In the study by Scott on the slow but unlimited swelling of rubber beyond the saturation point, this author has come to assume that swelling is a double phenomenon, which confirms our point of view. (4) The experimental study of the contraction of rubber during swelling shows that this effect does not change its sign at any moment and that consequently the change of sign of the heat evolved in this same process has a cause distinct from that of the initial swelling; perhaps it is to be attributed to the chemical phenomenon of solvation.

scholarly journals The Impact of a Vestibular-Stimulating Exercise Regime on Postural Stability in People with Visual Impairment

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Ida Wiszomirska ◽  
Katarzyna Kaczmarczyk ◽  
Michalina Błażkiewicz ◽  
Andrzej Wit
Keyword(s):  
Visual Impairment ◽  
Postural Stability ◽  
Control Group ◽  
Stability Parameters ◽  
Static Tests ◽  
Balance System ◽  
Eyes Closed ◽  
Exercise Regime ◽  
The Stability ◽  
The Impact

The aim of the study was to assess the impact of a vestibular-stimulating exercise regime on postural stability in individuals with visual impairment. The study group consisted of 70 people, including 28 persons (15 female and 13 male) with visual impairment and 42 (21 female and 21 male) without visual impairment. Each individual in the group with visual impairment was medically qualified for a 3-month training program. The research methodology included medical examination, anthropometric tests, and stabilometry tests on a Biodex Balance System SD (BBS). The tests were conducted twice: once before the start of training and again after 3 months of rehabilitation. The group with visual impairment showed significantly worse postural stability results than the control group for most of the stability parameters evaluated (OSI, APSI, and MLSI). Differences were noted between the groups with and without visual impairment for dynamic tests in women and for static tests in men. After training, the two groups showed roughly similar results for the stabilometry test with eyes closed. We conclude that exercises stimulating the vestibular system with head and body movements should be recommended for individuals with visual impairments to achieve better balance retention.

scholarly journals Relationship between Anthropometric Factors, Gender, and Balance under Unstable Conditions in Young Adults

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Júlia Maria D’Andréa Greve ◽  
Mutlu Cuğ ◽  
Deniz Dülgeroğlu ◽  
Guilherme Carlos Brech ◽  
Angelica Castilho Alonso
Keyword(s):  
Body Mass Index ◽  
Body Mass ◽  
Postural Balance ◽  
Linear Regression Analysis ◽  
Stability Index ◽  
Standing Position ◽  
Female Group ◽  
Balance System ◽  
Biodex Balance System ◽  
Mediolateral Stability

The objective of this study was to evaluate the relationship between the anthropometric factors of height, body mass, body mass index and postural balance and to compare the balance indices between genders in the upright standing position, in healthy adult subjects under conditions of instability. Forty individuals were subjected to functional tests of body stability using the Biodex Balance System, and the resulting indices were correlated with body mass, height, and body mass index, and also compared between genders. Body mass was the main anthropometric factor that influenced variations in postural balance, with a high correlation between groups and with all variables. A linear regression analysis showed that body mass associated with BMI explained 66% of the overall stability, and body mass explained 59% of the anteroposterior stability index and 65% of the mediolateral stability index. In the female group, body mass explained 72% of the overall balance, 66% of the anteroposterior, and 76% of the medio-lateral stability index. Increased body mass requires greater movements to maintain postural balance. Height and BMI presented moderate correlations with balance. Women showed less movement than men on the Biodex Balance System.

scholarly journals Stability issues in presence variable distributed generation into radial distribution network

2018 ◽  
Vol 218 ◽  
pp. 01005 ◽  
Author(s):  
Rahman Yuli Asmi ◽  
Agus Siswanto ◽  
Irwan Mahmudi
Keyword(s):  
Distributed Generation ◽  
Voltage Stability ◽  
Reactive Power ◽  
Load Condition ◽  
Stability Index ◽  
Before And After ◽  
Voltage Deviation ◽  
Bus Voltage ◽  
The Stability ◽  
The Impact

Related to environmental issues resulting from the use of traditional energy sources, drive usage of renewable energy is increasing. Changes in the structure of the network will certainly affect the changes in voltage stability. In this paper, discuss the impact of the stability after distributed generation penetration whose its output intermittent relatively. The simulation based PSAT software and tested into IEEE 30 bus system. Observation of voltage deviation and SVSI-index on some load buses in conditions before and after integration of wind generation. Load condition is a very determining factor of bus voltage stability index. This relates to the active power and reactive power needs that must be injected by DG penetration.

Factors Affecting Reliability of the Biodex Balance System: A Summary of Four Studies

2000 ◽  
Vol 9 (3) ◽  
pp. 240-252 ◽  
Author(s):  
Martha R. Hinman
Keyword(s):  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Stability Index ◽  
Retest Reliability ◽  
Factors Affecting ◽  
Balance System ◽  
Intraclass Correlation Coefficients ◽  
Balance Tests ◽  
Test Retest Reliability ◽  
Biodex Balance System

Purpose:To describe differences in test-retest reliability of balance measures produced by the Biodex Balance System.Methods:Subjects performed balance tests in 4 studies, each involving two 30-second tests under varying conditions. Test-retest reliability coefficients were calculated for the overall stability index (SI) under each condition. Test-retest reliability was computed for subjects' limits of stability (LOS).Results:Intraclass correlation coefficients (ICC3,1) ranged from .44 to .89 for static balance tests; variability between the 2 tests ranged from 21% to 37%. Tests at lower stability levels or without visual input produced the highest ICCs. ICCs for the LOS tests ranged from .64 to .89. These measures were less variable (6% to 8%) than the static measures of balance.Conclusions:Test-retest reliability of the SI produced by the Biodex Balance System is acceptable for clinical testing and is comparable to other balance measures currently in use.

scholarly journals Evaluation of Changes in the Parameters of Body Stability in the Participants of a Nine-Day Snowboarding Course

2017 ◽  
Vol 24 (2) ◽  
pp. 97-101 ◽  
Author(s):  
Michał Staniszewski ◽  
Przemysław Zybko ◽  
Ida Wiszomirska
Keyword(s):  
Postural Control ◽  
The Body ◽  
Considerable Difficulty ◽  
Balance System ◽  
Unstable Surface ◽  
Before And After ◽  
Shifting Balance ◽  
Biodex Balance System ◽  
Basic Position ◽  
Static Body

Abstract Introduction. Snowboarding is a sports discipline in which postural control is key to achieving an effective technique. The body is positioned sideways on the snowboard, with only the head facing forward. This study evaluated the effect of several days of intense snowboarding on the parameters of static and dynamic body stability in persons with different levels of skill. Material and methods. A nine-day snowboarding course was designed and conducted with beginner (N = 16) and advanced snowboarders (N = 14) in the mountains in winter. Before and after the course, dynamic body stability was measured on a Biodex Balance System (USA) platform with an unstable surface, and static body stability was measured on a FreeMed Sensor Medica (Italy) stabilometric platform. Results. Measurements on an unstable surface showed significantly weaker (p < 0.01) values of body stability in a lateral stance in the snowboarding stance than in a forward stance and a significant (p < 0.05) improvement in performance after the course. On a stable surface, the improvement in performance (p < 0.05) occurred only among the beginners, in the snowboard basic position. Conclusions. The results confirm that snowboarding, or continuous unstable balance, improves postural control, which leads to the conclusion that the lateral stance on the snowboard is a clearly disruptive factor in natural postural control. This constitutes a considerable difficulty, especially for beginners, who in addition to learning new technical skills, must adapt to continuously shifting balance.

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