scholarly journals Applicability of Smartphone for Dynamic Postural Stability Evaluation

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Jacek Polechoński ◽  
Agnieszka Nawrocka ◽  
Piotr Wodarski ◽  
Rajmund Tomik
Keyword(s):  
Postural Stability ◽  
Sagittal Plane ◽  
Body Height ◽  
Frontal Plane ◽  
Healthy Adults ◽  
Body Sway ◽  
Convenience Sample ◽  
Minute Interval ◽  
Specialized Equipment ◽  
Dynamic Postural Stability

The purpose of this study was to determine the accuracy of smartphone’s gyroscope for dynamic postural stability among young healthy adults. The research included convenience sample of 85 healthy adults—37 women (mean age 22.1±1.6, body height 167.2±7.0) and 48 men (mean age 22.4±1.7, body height 176.1±13.8). In order to assess the accuracy of stabilometric measurement recorded by mobile phone, the raw data obtained at the same time by Sigma Balance Platform and Smartphone (SP) were correlated. Two thirty-second trials with one-minute interval break were performed (first in the frontal plane and second in the sagittal plane). A total of 170 measurements of postural stability were recorded (85 in frontal and 85 in the sagittal plane). The following parameters were included: the path of the stabilogram (in the case of SP, angular path) and the variation of the swing (standard deviation of the horizontal deflection of the platform). The results have shown strong and significant relationship between body sway variability measured by Sigma platform and smartphone in frontal (r=0.997) and sagittal (r=0.990) plane. For the geometric center of the platform and angular path distances, the correlation coefficient was also statistically significant and high, considering both lateral (r=0.999) and anterior-posterior sway (r=0.981). Our research shows that smartphones with gyroscope have potential for accurate assessment of postural balance, as an alternative for expensive and specialized equipment.

Flexibility of the hamstring muscles and the position of thetrunk in boys training football

2021 ◽  
Vol 15 (2) ◽  
pp. 9-14
Author(s):  
Eliza Smoła ◽  
Katarzyna Wódka ◽  
Marta A. Bibro ◽  
Agnieszka Jankowicz-Szymańska
Keyword(s):  
Thoracic Kyphosis ◽  
Sagittal Plane ◽  
Body Height ◽  
Three Dimensional ◽  
Frontal Plane ◽  
Left Shoulder ◽  
Mean Values ◽  
Hamstring Muscles ◽  
Ultrasound System ◽  
The Right

<p><b>Introduction: </b>The objective of the study was to assess the flexibility of the hamstring muscles and their relationship with the position of the spine, shoulder and pelvic girdles in individual planes in boys training football. <p><b>Material and methods: </b>The study included 28 boys aged 10-14, training football 3 times a week for at least 2 years. The subjects were divided into two groups: correct bilateral flexibility of the hamstring muscles, bilateral shortening of the hamstring muscles. Body height and weight were measured and BMI was calculated. The three-dimensional position of the trunk was examined using the Zebris pointer ultrasound system. The passive straightleg- raising test was used to assess the flexibility of the hamstring muscles. <p><b>Results: </b>32% of people were diagnosed with the correct length of both hamstring muscles, 57% had shortened muscles in both limbs. Mean values determining the depth of thoracic kyphosis indicated its deepening in each of the groups, however, lower values were recorded in boys with reduced flexibility of the hamstring muscle mass. This group was also characterised by a better balance of the trunk in the sagittal plane. The average depth of lumbar lordosis in both groups was within the normal range. In the frontal plane, in both groups of footballers there was a tendency to lift the left shoulder (more frequent in the group with normal flexibility), the pelvis on the left side and shift the trunk to the right. <p><b>Conclusion: </b>Shortening of the hamstring muscles is common in boys who train football, but no evidence of a relationship between the limited flexibility of these muscles and the position of the trunk was found.

Dynamic Postural Stability of High-Level Athletes Specializing in Team Sports

2020 ◽  
pp. 401-408
Author(s):  
Aleksey S. Trishin ◽  
◽  
Elena M. Berdichevskaya ◽  
Evgeniy S. Trishin ◽  
Anastasiya M. Panteleeva
Keyword(s):  
Postural Stability ◽  
Sagittal Plane ◽  
Team Sports ◽  
Football Players ◽  
Basketball Players ◽  
Erect Posture ◽  
High Level ◽  
Rugby Players ◽  
Dynamic Postural Stability

The production of manifold and rapidly varying movements in team sports requires maintaining an erect posture. This paper aimed to study dynamic postural stability in athletes engaged in team sports. Among the participants were high-level basketball players (n = 15), rugby players (n = 15) and football players (n = 12), as well as 30 young people not professionally involved in sports, all aged 18–21 years. Postural stability was evaluated using stability analyser Stabilan-01 (OKB Ritm, Taganrog). We utilized the Evolventa test, which simulates the real situation of tracking movements in the games, allowing us to quickly assess not only the quality of the athlete’s tracking movement, but also the reserves of maintaining the stability of erect posture. Classical and vector stabilographic characteristics of upright posture stability were analysed. To assess the quality of tracking, special game indicators were used. Athletes demonstrated a significant superiority in the accuracy of performing motor tasks and at the same time in maintaining postural stability over young men not playing sports (p ≤ 0.05). Noteworthy, basketball players had the highest tracking accuracy in the frontal and, especially, in the sagittal plane (p ≤ 0.05). Moreover, basketball players kept their balance much better, surpassing rugby players and, above all, football players in most indicators in both planes (p ≤ 0.05). Thus, the effectiveness, accuracy and speed of completing tasks, as well as fewer errors in high-level athletes were combined with an automated ability, due to the stereotype formed over many years of training, to confidently maintain an upright position even in the most difficult game situations. However, when analysing postural stability, one must take into account the specifics of the sports under study, where a wide variety of ball-handling techniques is combined with competitive activity of the hands or feet.

The Effects of Acute Intense Physical Exercise on Postural Stability in Children With Cerebral Palsy

2016 ◽  
Vol 33 (3) ◽  
pp. 271-282 ◽  
Author(s):  
Matthew J. Leineweber ◽  
Dominik Wyss ◽  
Sophie-Krystale Dufour ◽  
Claire Gane ◽  
Karl Zabjek ◽  
...  
Keyword(s):  
Cerebral Palsy ◽  
Physical Exercise ◽  
Postural Stability ◽  
Sagittal Plane ◽  
Center Of Pressure ◽  
Force Plate ◽  
Frontal Plane ◽  
Increased Risk ◽  
Children With Cerebral Palsy ◽  
Risk Of Falls

This study evaluated the effects of intense physical exercise on postural stability of children with cerebral palsy (CP). Center of pressure (CoP) was measured in 9 typically developing (TD) children and 8 with CP before and after a maximal aerobic shuttle-run test (SRT) using a single force plate. Anteroposterior and mediolateral sway velocities, sway area, and sway regularity were calculated from the CoP data and compared between pre- and postexercise levels and between groups. Children with CP demonstrated significantly higher pre-SRT CoP velocities than TD children in the sagittal (18.6 ± 7.6 vs. 6.75 1.78 m/s) and frontal planes (15.4 ± 5.3 vs. 8.04 ± 1.51 m/s). Post-SRT, CoP velocities significantly increased for children with CP in the sagittal plane (27.0 ± 1.2 m/s), with near-significant increases in the frontal plane (25.0 ± 1.5m/s). Similarly, children with CP evidenced larger sway areas than the TD children both pre- and postexercise. The diminished postural stability in children with CP after short but intense physical exercise may have important implications including increased risk of falls and injury.

scholarly journals Postural Stability in Goalkeepers of the Polish National Junior Handball Team

2018 ◽  
Vol 63 (1) ◽  
pp. 161-170 ◽  
Author(s):  
Jacek Wilczyński
Keyword(s):  
Postural Stability ◽  
Path Length ◽  
Necessary Conditions ◽  
Sagittal Plane ◽  
Postural Sway ◽  
Body Height ◽  
Balance System ◽  
Coordination Training ◽  
Positive Correlations ◽  
Biodex Balance System

Abstract The aim of the study was to assess postural stability of goalkeepers from the Polish national junior handball team. Eleven juniors of the Polish national handball team (age 16.82 ± 1.6 years, body height 191.27 ± 3.1 cm, body mass 88.41 ± 12.26 kg, BMI 24.18 ± 3.22 kg/m2) were selected for the study. The Biodex Balance System and AccuGait AM¬TI platform were used to evaluate postural stability. The obtained results indicated good postural stability of the subjects. During the Biodex Balance System platform tests, all subjects presented very good postural stability and maintained within Zone A. Postural sway was greater in the sagittal plane compared to the frontal one. Most of the participants demonstrated slight backward tilts, but maintained in Quadrant IV. During the AccuGait AMTI platform trial, Path Length and Average COP Speed significantly increased in the test performed with closed eyes. Furthermore, there were significant positive correlations between the number of variables obtained during the Biodex Balance System and AccuGait AMTI tests. Proper and stable posture are necessary conditions to be met to carry out most free movements and locomotion. They play a significant role in the game of a handball goalkeeper and for that reason, postural stability testing of handball goalkeepers is an important element of coordination training. Thus, the use of postural stability exercises implementing the biofeedback method on stabilo and dynamometric platforms is practical and justifiable.

scholarly journals Standard reference values of the postural control in healthy female adults aged between 31 and 40 years in Germany: an observational study

2020 ◽  
Vol 39 (1) ◽  
Author(s):  
Daniela Ohlendorf ◽  
Julia Pflaum ◽  
Christina Wischnewski ◽  
Sebastian Schamberger ◽  
Christina Erbe ◽  
...  
Keyword(s):  
Postural Control ◽  
Sagittal Plane ◽  
Frontal Plane ◽  
Normal Function ◽  
The Body ◽  
Body Sway ◽  
Tolerance Interval ◽  
Balance System ◽  
Standard Values ◽  
The Right

Abstract Background To detect deviations from a normal postural control, standard values can be helpful for comparison purposes. Since the postural control is influenced by gender and age, the aim of the present study was the collection of standard values for women between 31 and 40 years of age. Methods For the study, 106 female, subjectively healthy, German subjects aged between 31 and 40 years (35 ± 2.98 years) were measured using a pressure measuring platform. Results Their average BMI was 21.60 ± 4.65 kg/m2. The load distribution between left and right foot was almost evenly balanced with a median 51.46% load on the left [tolerance interval (TR) 37.02%/65.90%; confidence interval (CI) 50.06/52.85%] and 48.54% [TR 43.10/62.97%; CI 47.14/49.93%] on the right foot. The median forefoot load was 33.84% [TR 20.68/54.73%; CI 31.67/37.33%] and the rearfoot load was measured at 66.16% [TR 45.27/79.33%; CI 62.67/68.33%]. The median/mean body sway in the sagittal plane was measured 12 mm [TR 5.45/23.44 mm; CI 11.00/14.00 mm] and 8.17 mm in the frontal plane [TR 3.33/19.08 mm; CI 7.67/9.33 mm]. The median of the ellipse area is 0.72 cm2 [TR 0.15/3.69 cm2; CI 0.54/0.89°]. The ellipse width has a median of 0.66 cm [TR 0.30/1.77 cm; CI 0.61/0.78 cm] and the height of 0.33 cm [TR 0.13/0.71 cm; CI 0.30/0.37 cm]. The ellipse angle (sway, left forefoot to right rearfoot) has a mean of − 19.34° [TR − 59.21/− 0.44°; CI − 22.52/− 16.16°] and the ellipse angle sway from right forefoot to left rearfoot has a mean of 12.75° [TR 0.09/59.09°; CI 9.00/16.33°]. Conclusion The right-to-left ratio is balanced. The forefoot-to-rearfoot ratio is approximately 1:2. Also, the body sway can be classified with 12 and 8 mm as normal. The direction of fluctuation is either approx. 19° from the left forefoot to the right rearfoot or approx. 13° the opposite. Body weight, height, and BMI were comparable to the German average of women in a similar age group, so that the measured standard values are representative and might serve as baseline for the normal function of the balance system in order to support the diagnosis of possible dysfunctions in postural control.

scholarly journals Dynamic Postural-Stability Deficits After Cryotherapy to the Ankle Joint

2015 ◽  
Vol 50 (9) ◽  
pp. 893-904 ◽  
Author(s):  
Karl Fullam ◽  
Brian Caulfield ◽  
Garrett F. Coughlan ◽  
Mark McGroarty ◽  
Eamonn Delahunt
Keyword(s):  
Ankle Joint ◽  
Postural Stability ◽  
Sagittal Plane ◽  
Center Of Pressure ◽  
Mean Velocity ◽  
Balance Test ◽  
Before And After ◽  
Elite Level ◽  
Star Excursion Balance Test ◽  
Dynamic Postural Stability

Context  Decreased postural stability is a primary risk factor for lower limb musculoskeletal injuries. During athletic competitions, cryotherapy may be applied during short breaks in play or during half-time; however, its effects on postural stability remain unclear. Objective  To investigate the acute effects of a 15-minute ankle-joint cryotherapy application on dynamic postural stability. Design  Controlled laboratory study. Setting  University biomechanics laboratory. Patients or Other Participants  A total of 29 elite-level collegiate male field-sport athletes (age = 20.8 ± 1.12 years, height = 1.80 ± 0.06 m, mass = 81.89 ± 8.59 kg) participated. Intervention(s)  Participants were tested on the anterior (ANT), posterolateral (PL), and posteromedial (PM) reach directions of the Star Excursion Balance Test before and after a 15-minute ankle-joint cryotherapy application. Main Outcome Measure(s)  Normalized reach distances; sagittal-plane kinematics of the hip, knee, and ankle joints; and associated mean velocity of the center-of-pressure path during performance of the ANT, PL, and PM reach directions of the Star Excursion Balance Test. Results  We observed a decrease in reach-distance scores for the ANT, PL, and PM reach directions from precryotherapy to postcryotherapy (P &lt; .05). No differences were observed in hip-, knee-, or ankle-joint sagittal-plane kinematics (P &gt; .05). We noted a decrease in mean velocity of the center-of-pressure path from precryotherapy to postcryotherapy (P &lt; .05) in all reach directions. Conclusions  Dynamic postural stability was adversely affected immediately after cryotherapy to the ankle joint.

scholarly journals Sit-to-Stand in People with Stroke: Effect of Lower Limb Constraint-Induced Movement Strategies

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Charla Krystine Gray ◽  
Elsie Culham
Keyword(s):  
Sagittal Plane ◽  
Weight Bearing ◽  
Frontal Plane ◽  
Centre Of Mass ◽  
Centre Of Pressure ◽  
Convenience Sample ◽  
Sit To Stand ◽  
Movement Strategies ◽  
Mass Displacement ◽  
Foot Position

Background. Weight-bearing asymmetry and impaired balance may contribute to the increased fall risk in people with stroke when rising to stand from sitting.Objective. This study investigated the effect of constraint-induced movement (CIM) strategies on weight-bearing symmetry and balance during sit-to-stand in people with stroke.Methods. A nonrandom convenience sample of fifteen people with stroke performed the sit-to-stand task using three CIM strategies including a solid or compliant (foam) block strategy, with the unaffected limb placed on the block, and an asymmetrical foot position strategy, with the unaffected limb placed ahead of the affected limb. Duration of the task, affected limb weight-bearing, and centre of pressure and centre of mass displacement were measured in the frontal and sagittal plane.Results. Affected limb weight-bearing was increased and frontal plane centre of pressure and centre of mass moved toward the affected limb compared to baseline with all CIM strategies. Centre of mass displacement in the sagittal plane was greater with the compliant block and asymmetrical foot strategies.Conclusions. The CIM strategies demonstrated greater loading of the affected limb and movement of the centre of pressure and centre of mass toward the affected limb. The compliant block and asymmetrical foot conditions may challenge sagittal plane balance during sit-to-stand in people with stroke.

scholarly journals Using Biofeedback to Reduce Step Length Asymmetry Impairs Dynamic Balance in People Poststroke

2021 ◽  
pp. 154596832110193
Author(s):  
Sungwoo Park ◽  
Chang Liu ◽  
Natalia Sánchez ◽  
Julie K. Tilson ◽  
Sara J. Mulroy ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Sagittal Plane ◽  
Dynamic Balance ◽  
Objective Measure ◽  
Frontal Plane ◽  
Step Length ◽  
Berg Balance Scale ◽  
Whole Body ◽  
Functional Gait ◽  
Full Body

Background People poststroke often walk with a spatiotemporally asymmetric gait, due in part to sensorimotor impairments in the paretic lower extremity. Although reducing asymmetry is a common objective of rehabilitation, the effects of improving symmetry on balance are yet to be determined. Objective We established the concurrent validity of whole-body angular momentum as a measure of balance, and we determined if reducing step length asymmetry would improve balance by decreasing whole-body angular momentum. Methods We performed clinical balance assessments and measured whole-body angular momentum during walking using a full-body marker set in a sample of 36 people with chronic stroke. We then used a biofeedback-based approach to modify step length asymmetry in a subset of 15 of these individuals who had marked asymmetry and we measured the resulting changes in whole-body angular momentum. Results When participants walked without biofeedback, whole-body angular momentum in the sagittal and frontal plane was negatively correlated with scores on the Berg Balance Scale and Functional Gait Assessment supporting the validity of whole-body angular momentum as an objective measure of dynamic balance. We also observed that when participants walked more symmetrically, their whole-body angular momentum in the sagittal plane increased rather than decreased. Conclusions Voluntary reductions of step length asymmetry in people poststroke resulted in reduced measures of dynamic balance. This is consistent with the idea that after stroke, individuals might have an implicit preference not to deviate from their natural asymmetry while walking because it could compromise their balance. Clinical Trials Number: NCT03916562.

Static and dynamic postural stability of children girls engaged in modern dance

2021 ◽  
pp. 1-9
Author(s):  
Dragan Marinkovic ◽  
Aleksandra Belic ◽  
Ana Marijanac ◽  
Ellis Martin-Wylie ◽  
Dejan Madic ◽  
...  
Keyword(s):  
Postural Stability ◽  
Modern Dance ◽  
Dynamic Postural Stability
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