scholarly journals Postural balance and neck angle changes in school children while carrying a traditional backpack versus a double-sided bag

2018 ◽  
Vol 10 (1) ◽  
pp. 59-66 ◽  
Author(s):  
Dalia Mohammed Mosaad ◽  
Amr Almaz Abdel-aziem
Keyword(s):  
School Children ◽  
Three Dimensional ◽  
Load Condition ◽  
Stability Index ◽  
The Body ◽  
Body Balance ◽  
Balance System ◽  
Analysis System ◽  
Craniovertebral Angle ◽  
Biodex Balance System

Summary Study aim: This study compared the body balance and neck angle differences in children when carrying a traditional backpack versus a double-sided bag. Material and methods: By using the Biodex balance system and a three dimensional motion analysis system, the postural bal­ance and neck angles were assessed in 33 school children while carrying a traditional backpack or a double-sided bag, weigh­ing 15% of body weight. Results: The overall and anteroposterior stability indices were significantly higher when carrying a traditional backpack com­pared to no load and a double-sided bag (p < 0.05). The mediolateral stability index was significantly higher when carrying the traditional backpack and the double-sided bag compared to no load (p < 0.05). The craniohorizontal angle was significantly greater, and the craniovertebral angle and sagittal shoulder posture were significantly lesser when carrying the traditional back­pack compared to no load and the double-sided bag conditions (p < 0.05). Conclusion: Carrying the double-sided bag restores the body balance and head posture to a condition that is similar to the no load condition.

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 Effect of Leg Dominance on The Center-of-Mass Kinematics During an Inside-of-the-Foot Kick in Amateur Soccer Players

2014 ◽  
Vol 42 (1) ◽  
pp. 51-61 ◽  
Author(s):  
Matteo Zago ◽  
Andrea Francesco Motta ◽  
Andrea Mapelli ◽  
Isabella Annoni ◽  
Christel Galvani ◽  
...  
Keyword(s):  
Body Movement ◽  
Center Of Mass ◽  
Three Dimensional ◽  
The Body ◽  
Soccer Players ◽  
Upper Body ◽  
Whole Body ◽  
Movement Velocity ◽  
Ground Support ◽  
Analysis System

Abstract Soccer kicking kinematics has received wide interest in literature. However, while the instep-kick has been broadly studied, only few researchers investigated the inside-of-the-foot kick, which is one of the most frequently performed techniques during games. In particular, little knowledge is available about differences in kinematics when kicking with the preferred and non-preferred leg. A motion analysis system recorded the three-dimensional coordinates of reflective markers placed upon the body of nine amateur soccer players (23.0 ± 2.1 years, BMI 22.2 ± 2.6 kg/m2), who performed 30 pass-kicks each, 15 with the preferred and 15 with the non-preferred leg. We investigated skill kinematics while maintaining a perspective on the complete picture of movement, looking for laterality related differences. The main focus was laid on: anatomical angles, contribution of upper limbs in kick biomechanics, kinematics of the body Center of Mass (CoM), which describes the whole body movement and is related to balance and stability. When kicking with the preferred leg, CoM displacement during the ground-support phase was 13% higher (p<0.001), normalized CoM height was 1.3% lower (p<0.001) and CoM velocity 10% higher (p<0.01); foot and shank velocities were about 5% higher (p<0.01); arms were more abducted (p<0.01); shoulders were rotated more towards the target (p<0.01, 6° mean orientation difference). We concluded that differences in motor control between preferred and non-preferred leg kicks exist, particularly in the movement velocity and upper body kinematics. Coaches can use these results to provide effective instructions to players in the learning process, moving their focus on kicking speed and upper body behavior

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.

scholarly journals The Development of a Repetition-Load Scheme for the Eccentric- Only Bench Press Exercise

2013 ◽  
Vol 38 ◽  
pp. 23-31 ◽  
Author(s):  
Gavin L. Moir ◽  
Kyle F. Erny ◽  
Shala E. Davis ◽  
John J. Guers ◽  
Chad A. Witmer
Keyword(s):  
Linear Function ◽  
Bench Press ◽  
Three Dimensional ◽  
Load Condition ◽  
Vertical Force ◽  
Starting Point ◽  
Stretch Shortening Cycle ◽  
Analysis System ◽  
Repetitions To Failure

Abstract The purpose of the present study was to develop a repetition-load scheme for the eccentric-only bench press exercise. Nine resistance trained men (age: 21.6 ± 1.0 years; 1-repetition maximum [RM] bench press: 137.7 ± 30.4 kg) attended four testing sessions during a four week period. During the first session each subject’s 1-RM bench press load utilizing the stretch-shortening cycle was determined. During the remaining sessions they performed eccentric-only repetitions to failure using supra-maximal loads equivalent to 110%, 120% and 130% of their 1-RM value with a constant cadence (30 reps·min-1). Force plates and a three dimensional motion analysis system were used during these final three sessions in order to evaluate kinematic and kinetic variables. More repetitions were completed during the 110% 1-RM condition compared to the 130% 1-RM condition (p=0.01). Mean total work (p=0.046) as well as vertical force (p=0.049), vertical work (p=0.017), and vertical power output (p=0.05) were significantly greater during the 130% 1-RM condition compared to the 110% 1-RM condition. A linear function was fitted to the number of repetitions completed under each load condition that allowed the determination of the maximum number of repetitions that could be completed under other supra-maximal loads. This linear function predicted an eccentric-only 1-RM in the bench press with a load equivalent to 164.8% 1-RM, producing a load of 227.0 ± 50.0 kg. The repetition-load scheme presented here should provide a starting point for researchers to investigate the kinematic, kinetic and metabolic responses to eccentric-only bench press workouts.

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 Analysis of students’ foot pressure distribution on the ground, as well as their body balance before and after exercise

2020 ◽  
Vol 24 (4) ◽  
pp. 194-204
Author(s):  
Jarosław Jaszczur-Nowicki ◽  
Joanna Bukowska ◽  
Dariusz Kruczkowski ◽  
Michał Spieszny ◽  
Magdalena Pieniążek ◽  
...  
Keyword(s):  
Body Composition ◽  
Pressure Distribution ◽  
Physiological Parameters ◽  
The Body ◽  
Foot Pressure ◽  
Body Balance ◽  
Balance System ◽  
Functional Efficiency ◽  
Before And After ◽  
The Impact

Background and Study Aim: The article presents the results of analyses of students’ foot pressure distribution on the ground, as well as their body balance before and after exercise (Harvard Step Test). The aim of the paper was to carry out a comparative analysis of foot pressure distribution on the ground, as well as assess the degree of body balance before and after exercise. With that purpose in view, the following research hypothesis was formulated: in the students participating in the study, the distribution of foot pressure on the ground and the degree of body balance differ significantly after physical effort compared with the at-rest conditions. Material and Methods: The study encompassed n=48 students, including 37 women and 11 men. The tests were carried out using such tools as: an EPS/R1 podobarographic mat and the impedance methods – i.e. the InBody 270 body composition analyser. An analysis was performed for the parameters concerning body composition, the distribution of foot pressure on the ground, and the level of body balance. Results: The results obtained revealed statistically significant differences in the physiological parameters of foot arching and the functional efficiency of the body balance system under different measurement conditions that reflected the impact of effort stimuli. Conclusions: Significant differences reflecting the impact of the effort stimuli were expected to be achieved during the mathematical analysis of the results of podobarographic tests that allow for the assessment of the physiological parameters of foot arching and the functional efficiency of the body balance system under different measurement conditions. The authors’ assumption was mathematically and statistically confirmed by significant differences foe most of the parameters arising out of the possibilities offered by the research method applied. Comparative assessment unquestionably revealed a negative change in foot arching, as well as lower body posture stability in the female and male subjects, resulting from the physical exercise applied.

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.

Reliability Analysis of Posturography Using a Newly Developed Automatic Balance Calibration System

2013 ◽  
Vol 373-375 ◽  
pp. 1518-1524
Author(s):  
Woo Suk Chong ◽  
Sun Yeon Lee ◽  
Byung Hyun Park ◽  
Jong Kwan Park ◽  
Tae Kyu Kwon ◽  
...  
Keyword(s):  
Intraclass Correlation ◽  
Maximum Velocity ◽  
Stability Index ◽  
Calibration System ◽  
Medical Systems ◽  
Balance System ◽  
Automatic Balance ◽  
Directional Control ◽  
Biodex Balance System ◽  
Balance Calibration

The purpose of this study was to examine the reliability of posturography using a newly developed automatic balance calibration system (I Balance S (CyberMedic Co., Korea)). Twenty-three patients who volunteered participated in this study. Mean center of gravity (COG) sway velocity, total distance, maximum velocity (MV), average movement degree (AMD), maximum excursion (ME) and directional control (DC) were measured by I Balance S. Overall stability index and overall directional control score were measured by Biodex Balance System (Biodex Medical Systems Inc., New York, USA). For the accurate measurement, the COG was automatically calibrated to zero before each measurement by I Balance S. Each subject was tested twice by examiner A and once by examiner B. The intraclass correlation coefficients (ICC) were calculated to assess the inter-rater and intra-rater reliability. Inter-rater reliabilities were higher with the I Balance S (ICC, 0.80-0.91) than with the Biodex Balance System (ICC, 0.71-0.82). Intra-rater reliabilities were similar between the I Balance S (ICC, 0.88-0.94) and the Biodex Balance System SD (ICC, 0.90-0.91). I Balance S using an automatic balance calibration system is a reliable posturography method for performing balance assessments.

scholarly journals Evaluation of Laterality in the Snowboard Basic Position

2016 ◽  
Vol 17 (2) ◽  
Author(s):  
Michał Staniszewski ◽  
Przemysław Zybko ◽  
Ida Wiszomirska
Keyword(s):  
Standing Position ◽  
The Body ◽  
Lower Limbs ◽  
Balance System ◽  
Study Results ◽  
Side Preference ◽  
The Stability ◽  
Static Conditions ◽  
Biodex Balance System ◽  
Lateral Positioning

AbstractSnowboarding requires a lateral positioning of the body. Moreover, a person must continuously control their balance and use this in order to manoeuvre on the slope applying properly pressure on the lower limb closest to the nose of the board (the leading leg). The present study is an attempt to determine the interdependencies between side preference while snowboarding and laterality when performing other tasks. The dynamic stability in the neutral standing position, as well as in the lateral positions (left or right) was also evaluated.The survey participants (100 active snowboarders) answered a set of questions concerning laterality while carrying out basic everyday tasks and while doing sports. The respondents were divided into two groups based on their preferred leading side in snowboarding. Additionally, in the case of 34 people, muscle torques values of the lower limbs were measured under static conditions and the postural stability was evaluated using AccuSway AMTI platform and Biodex Balance System platform.Over 90% of the participants declared right-handedness and right-footedness. However, with regard to snowboarding, only 66% indicated their right leg as leading. No significant dependence was found between the directional stance on the board and the leading hand, dominant leg, or leading eye. The stability measurements revealed statistically significant differences between the neutral stance and the lateral positioning.Based on the study results, it may be assumed that the declared directional stance on the snowboard is not contingent on the person’s basic laterality, and that the lateral stance on the board significantly affects the posture control.

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