The relationship between pressure injuries and dynamic buttock pressure distributions during performance in wheelchair basketball athletes

2021 ◽  
Vol 29 (4) ◽  
Author(s):  
Tomonori Maeda ◽  
Nao Tamai ◽  
Takeo Minematsu ◽  
Hiroshi Noguchi ◽  
Koichi Yabunaka ◽  
...  
Keyword(s):  
Wheelchair Basketball ◽  
Pressure Distributions ◽  
The Relationship

The relationship between skin ultrasound images and muscle damage using skin blotting in wheelchair basketball athletes

Spinal Cord ◽  
2020 ◽  
Vol 58 (9) ◽  
pp. 1022-1029
Author(s):  
Nao Tamai ◽  
Takeo Minematsu ◽  
Tomonori Maeda ◽  
Koichi Yabunaka ◽  
Hiromi Sanada
Keyword(s):  
Muscle Damage ◽  
Ultrasound Images ◽  
Wheelchair Basketball ◽  
Skin Ultrasound ◽  
The Relationship

Velocity and Power–Load Association of Bench-Press Exercise in Wheelchair Basketball Players and their Relationships With Field-Test Performance

2019 ◽  
Vol 14 (7) ◽  
pp. 880-886 ◽  
Author(s):  
Aitor Iturricastillo ◽  
Cristina Granados ◽  
Raúl Reina ◽  
José Manuel Sarabia ◽  
Ander Romarate ◽  
...  
Keyword(s):  
Inverse Relationship ◽  
Bench Press ◽  
Wheelchair Basketball ◽  
Basketball Players ◽  
Ability Test ◽  
Change Of Direction ◽  
Repeated Sprint Ability ◽  
Repeated Sprint ◽  
The Relationship ◽  
Sprint Ability

Purpose: To analyze the relationship between mean propulsive velocity (MPV) of the bar and relative load (percentage of the 1-repetition maximum [%1RM]) in the bench-press (BP) exercise and to determine the relationship of power variables (ie, mean concentric power [MP], mean propulsive power [MPP], and peak power [PP]) in change-of-direction ability, linear sprint, and repeated-sprint ability. Methods: A total of 9 Spanish First Division wheelchair basketball players participated in the study. All participants performed an isoinertial BP test in free execution mode, a 505 change-of-direction ability test, linear sprint test (20 m), and repeated-sprint ability test. Results: A nearly perfect and inverse relationship was observed for the BP exercise between the %1RM and MPV (r = −.97, R2 = .945, P < .001). The maximum loads for MP, MPP, and PP were obtained between 48.1% and 59.4% of the 1RM. However, no significant correlations were observed between strength and wheelchair performance. Conclusions: Wheelchair basketball players with different functional impairments showed a nearly perfect and inverse relationship for the BP exercise between the %1RM and MPV; thus the MPV could be used to estimate the %1RM. This finding has important practical applications for velocity-based resistance training in that coaches would be able to prescribe and monitor training load. Conversely, the absence of association between BP performance and field tests might be due to other factors such as the wheelchair–user interface, trunk-muscle activity, or propulsion technique, apart from strength variables.

Theoretical and Simulative Study on Hydraulic Bridge of Water Hydraulic Servo Valve

2011 ◽  
Vol 181-182 ◽  
pp. 305-309 ◽  
Author(s):  
Xin Hua Wang ◽  
Jia Qing Chang ◽  
Shu Wen Sun ◽  
Gang Zheng
Keyword(s):  
Fluid Dynamics ◽  
Steady State ◽  
Dynamics Simulation ◽  
Computational Fluid Dynamics Simulation ◽  
Servo Valve ◽  
Pressure Distributions ◽  
Hydraulic Servo ◽  
Water Hydraulic ◽  
The Relationship ◽  
Annular Clearance

An analysis has been conducted on the hydraulic bridge of the water hydraulic servo valve with annular clearance between sleeve and spool land as its first hydraulic resistance. Through some formula deductions, the simplified hydraulic bridge is drawn and the relationship between flapper displacement and differential pressure of spool ends, which is demonstrated by the subsequent simulation works, is extracted. By the CFD(computational fluid dynamics) simulation, firstly, the pressure distributions of the flapper face and the fore end face of the nozzle are obtained. Results show that the flapper has an annular area where the existing pressure is negative. Secondly, the relationship between flapper displacement and flow force acting on flapper is also acquired, which is much beneficial to the steady-state and dynamic analysis of the water hydraulic servo valve.

The Numerical Simulation and Optimal Design of Nozzle Jet for Gas-Fluid Two Phase Flow

2011 ◽  
Vol 291-294 ◽  
pp. 2403-2406
Author(s):  
Yan Min Li ◽  
Fei Ma
Keyword(s):  
Optimal Design ◽  
Two Phase Flow ◽  
Structural Parameters ◽  
Performance Testing ◽  
Fluid Phase ◽  
Phase Flow ◽  
Two Phase ◽  
Pressure Distributions ◽  
And Performance ◽  
The Relationship

Taking a nozzle jet for gas-fluid phase flow as a research object, the influences of the main structural parameters on the vacuum in the internal suction volume are analyzed. Utilizing the software FLUENT to simulate the gas-liquid two-phase flow in nozzle jet with different structural parameters, the pressure distributions are obtained and the relationship between the structural parameters and the vacuum in the suction volume is concerned. The results show that the vacuum in the suction volume of jet reaches the maximum when these structural parameters are some certain values. The research is helpful for the optimal design and performance testing of nozzle jets.

scholarly journals THE RELATIONSHIP BETWEEN PLAYING SPORTS AND SELF-EFFICACY IN PEOPLE WITH DISABILITIES

2020 ◽  
pp. 409
Author(s):  
Petar Mitić ◽  
Bojan Jorgić ◽  
Ivan Popović ◽  
Miljan Hadžović
Keyword(s):  
Self Efficacy ◽  
Univariate Analysis ◽  
People With Disabilities ◽  
Wheelchair Basketball ◽  
Basketball Players ◽  
Athletes With Disabilities ◽  
Post Hoc ◽  
The Relationship ◽  
One Way Anova ◽  
Different Levels

elf-efficacy is an assessment of an individual's own ability to organize and perform certain actions necessary to achieve the desired outcomes, and its development is very important. The research aimed to determine whether participation in sports and success in playing sports are associated with more pronounced self-efficacy in people with disabilities, and included two studies. The aim of the first study was to examine the differences in self-efficacy between those who play sports (goalball) and those who do not play sports on a sample of people with visual impairment, as well as whether this difference exists between goalball players of different levels of performance. The aim of the second study was to examine the existence of differences in self-efficacy between wheelchair basketball players and non-wheelchair basketball players. The Generalized Self-Efficacy Scale consisting of ten statements was used as the measuring instrument and the respondents stated how much each item refers to them on a five-point Likert-type scale (from 0 to 4). In data processing the statistical method of the t-test, univariate analysis of variance (One way ANOVA), as well as the Post-Hoc test, were used. The results show that people with disabilities who play sports have more pronounced self-efficacy compared to those who do not play sports, as well as compared to athletes without disabilities. Statistical differences in self-efficacy between athletes with disabilities of different levels of performance have not been identified.

scholarly journals Quantifying Wheelchair Basketball Match Load: A Comparison of Heart-Rate and Perceived-Exertion Methods

2016 ◽  
Vol 11 (4) ◽  
pp. 508-514 ◽  
Author(s):  
Aitor Iturricastillo ◽  
Javier Yanci ◽  
Cristina Granados ◽  
Victoria Goosey-Tolfrey
Keyword(s):  
Heart Rate ◽  
Perceived Exertion ◽  
Rating Of Perceived Exertion ◽  
Physical Impairment ◽  
Wheelchair Basketball ◽  
Competitive Season ◽  
The Relationship

Purpose:To describe the objective and subjective match load (ML) of wheelchair basketball (WB) and determine the relationship between session heart-rate (HR) -based ML and rating-of-perceived-exertion (RPE) -based ML methods.Methods:HR-based measurements of ML included Edwards ML and Stagno training impulses (TRIMPMOD), while RPE-based ML measurements included respiratory (sRPEres) and muscular (sRPEmus). Data were collected from 10 WB players during a whole competitive season.Results:Edwards ML and TRIMPMOD averaged across 16 matches were 255.3 ± 66.3 and 167.9 ± 67.1 AU, respectively. In contrast, sRPEres ML and sRPEmus ML were found to be higher (521.9 ± 188.7 and 536.9 ± 185.8 AU, respectively). Moderate correlations (r = .629–.648, P < .001) between Edwards ML and RPE-based ML methods were found. Moreover, similar significant correlations were also shown between the TRIMPMOD and RPE-based ML methods (r = .627–.668, P < .001). That said, only ≥40% of variance in HR-based ML was explained by RPE-based ML, which could be explained by the heterogeneity of physical-impairment type.Conclusion:RPE-based ML methods could be used as an indicator of global internal ML in highly trained WB players.

Cartilage Deformation Measured by MRI Image Segmentation Validates MRI-Based Modeling Results

2008 ◽  
Author(s):  
Kenneth J. Fischer ◽  
Alexander J. Waller ◽  
Mehmet Bilgen ◽  
E. Bruce Toby ◽  
Manuela Kunz ◽  
...  
Keyword(s):  
Contact Pressure ◽  
Joint Mechanics ◽  
Normal Contact ◽  
Non Invasive ◽  
Pressure Distributions ◽  
Healthy Cartilage ◽  
Mri Scans ◽  
Normal Contact Pressure ◽  
The Relationship

The onset of arthritis is clearly associated with abnormal joint kinematics and contact pressures [1]. Yet our understanding of in vivo joint mechanics is still limited. In order to elucidate the relationship between joint mechanics and arthritis we must increase our knowledge of normal contact pressure distributions that help maintain healthy cartilage and abnormal contact pressure distributions that lead to arthritis. MRI-based modeling is a non-invasive means of determining joint mechanics in vivo, by combining information from MRI scans of joints with and without active functional loading.

Experiments and Evaluation of Body Pressure Distribution on Wheelchair Cushion

2014 ◽  
Vol 529 ◽  
pp. 317-320 ◽  
Author(s):  
Ying Liu ◽  
Xiu Feng Zhang ◽  
Yan Ma
Keyword(s):  
Contact Area ◽  
Subjective Evaluation ◽  
Objective Assessment ◽  
Subjective Assessment ◽  
Experimental Results ◽  
Pressure Distributions ◽  
Seat Cushion ◽  
Seating Comfort ◽  
Body Pressure Distribution ◽  
The Relationship

To study the relationship between wheelchair cushion shape and seat cushion comfort. By measuring sitting pressure distributions on wheelchair cushions with different shape, indices of sitting pressure such as the contact area, maximum sitting pressure were discussed along with method for subjective evaluation and objective test combination to analyze the relationship between seat cushion shape and seat cushion comfort. The experimental results from subjective assessment on three kinds of seat cushion indicate that the cushion shape is an important factor affecting seating comfort .The experimental results from objective assessment indicate that the contact area and maximum sitting pressure can preferably reflect the comfort of seat cushion and be used to evaluate the comfort of seat cushion.

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