The Use of a Low-Cost Gaming Platform as a Substitute to Medical-Grade Force Plate in Objective Evaluation of Balance

2021 ◽  
Author(s):  
Anubhav Singh ◽  
Rakesh Datta ◽  
Rohit Singh
Keyword(s):  
Low Cost ◽  
Force Plate ◽  
Objective Evaluation ◽  
Medical Grade

Effects of Fatigue on the BTrackS Balance Test for Concussion Management

2017 ◽  
Vol 22 (4) ◽  
pp. 23-28 ◽  
Author(s):  
Scott E. Benedict ◽  
Jeffrey W. Hinshaw ◽  
Ryan Byron-Fields ◽  
Harsimran S. Baweja ◽  
Daniel J. Goble
Keyword(s):  
Scoring System ◽  
Tracking System ◽  
Low Cost ◽  
Force Plate ◽  
Balance Assessment ◽  
Balance Test ◽  
Concussion Management ◽  
Fatigue Protocol ◽  
Balance Testing ◽  
Balance Error

Fatigue has been shown to adversely affect balance results, as measured by the Balance Error Scoring System (BESS). The present study aimed to determine whether a new low-cost force plate for concussion balance assessment, the Balance Tracking System (BTrackS), is subject to similar fatigue effects. Significant fatigue effects were only evident immediately following a fatigue protocol (p > .05), and were fully resolved within 5 min postfatigue. These results suggest that the BTrackS Balance Test (BBT) is more fatigue resistant than the BESS, and support use of the BBT as a potentially more reliable alternative to the BESS during immediate sideline balance testing.

scholarly journals Technology in Rehabilitation: Evaluating the Single Leg Squat Exercise with Wearable Inertial Measurement Units

2017 ◽  
Vol 56 (02) ◽  
pp. 88-94 ◽  
Author(s):  
Tomás E. Ward ◽  
Eamonn Delahunt ◽  
Brian Caulfield ◽  
Darragh F. Whelan ◽  
Martin A. O'Reilly
Keyword(s):  
Lumbar Spine ◽  
Lower Limb ◽  
Low Cost ◽  
Objective Evaluation ◽  
Inertial Measurement Units ◽  
Lower Limb Injury ◽  
Inertial Measurement ◽  
Increased Risk ◽  
Measurement Units ◽  
Single Leg Squat

SummaryBackground: The single leg squat (SLS) is a common lower limb rehabilitation exercise. It is also frequently used as an evaluative exercise to screen for an increased risk of lower limb injury. To date athlete/patient SLS technique has been assessed using expensive laboratory equipment or subjective clinical judgement; both of which are not without shortcomings. Inertial measurement units (IMUs) may offer a low cost solution for the objective evaluation of athlete/patient SLS technique.Objectives: The aims of this study were to determine if in combination or in isolation IMUs positioned on the lumbar spine, thigh and shank are capable of: (a) distinguishing between acceptable and aberrant SLS technique; (b) identifying specific deviations from acceptable SLS technique.Methods: Eighty-three healthy volunteers participated (60 males, 23 females, age: 24.68 +/− 4.91 years, height: 1.75 +/− 0.09 m, body mass: 76.01 +/− 13.29 kg). All participants performed 10 SLSs on their left leg. IMUs were positioned on participants’ lumbar spine, left shank and left thigh. These were utilized to record tri-axial accelerometer, gyroscope and magnetometer data during all repetitions of the SLS. SLS technique was labelled by a Chartered Physiotherapist using an evaluation framework. Features were extracted from the labelled sensor data. These features were used to train and evaluate a variety of random-forests classifiers that assessed SLS technique.Results: A three IMU system was moderately successful in detecting the overall quality of SLS performance (77% accuracy, 77% sensitivity and 78% specificity). A single IMU worn on the shank can complete the same analysis with 76% accuracy, 75% sensitivity and 76% specificity. Single sensors also produce competitive classification scores relative to multi-sensor systems in identifying specific deviations from acceptable SLS technique.Conclusions: A single IMU positioned on the shank can differentiate between acceptable and aberrant SLS technique with moderate levels of accuracy. It can also capably identify specific deviations from optimal SLS performance. IMUs may offer a low cost solution for the objective evaluation of SLS performance. Additionally, the classifiers described may provide useful input to an exercise biofeed-back application.

scholarly journals Sistema de evaluación del desempeño técnico-táctico en voleibol, una propuesta sencilla (Evaluation system of the technical-tactical performance in volleyball, a simple proposal)

Retos ◽  
2020 ◽  
pp. 318-324
Author(s):  
Cristian Hernández-Wimmer ◽  
Valentín Tamayo-Contreras ◽  
Esteban Aedo-Muñoz ◽  
Cristian Rojas-Reyes
Keyword(s):  
Performance Evaluation ◽  
Evaluation System ◽  
Low Cost ◽  
Objective Evaluation ◽  
Computer Tool ◽  
Technical Performance ◽  
Intermediate Data ◽  
Summary Sheet ◽  
Volleyball Players ◽  
Microsoft Office

El propósito de esta investigación fue construir un instrumento de evaluación del desempeño técnico-táctico de los jugadores de vóleibol, que posibilite la toma de decisión por parte del entrenador. Las variables de estudio fueron la evaluación del desempeño técnico de los jugadores de vóleibol y la evaluación del desempeño táctico de un equipo de vóleibol, a través del programa Microsoft Office Excel®, que permitió registrar y acceder en tiempo real a la información durante el desarrollo de un partido. La evaluación de desempeño técnico abarcó fundamentos técnicos, con su respectiva categorización de valores. La evaluación de desempeño táctico del equipo se compuso por la organización de la levantada, el porcentaje de eficiencia técnica del ataque en k1 y k2, y el análisis de distribución de levantada y eficiencia de ataque por rotación. El programa consiste en 6 libros de Excel® que trabajan de manera interrelacionada. Los primeros cinco corresponden a los sets jugados y el sexto, al resumen de toda la información ingresada. Las hojas se dividen en: Activas (Hoja final, hoja general, hoja diferencia, hoja atqefi, hoja análisis atqk2 y hoja resumen por jugador), Intermedias (Datos y ATAQRSM), y Pasivas (Tablas). El instrumento de evaluación desempeño técnico-táctico aporta y desarrolla en el ámbito de la evaluación objetiva de los rendimientos técnicos-tácticos. Este instrumento presenta características de bajo costo y fácil operación constituyen fortalezas que beneficiarán a todos aquellos entrenadores que lo utilicen. Abstract. The purpose of this study was to build an instrument for evaluating the technical-tactical performance of the volleyball players, which enables a decision making by the coach. The study variables were the evaluation of the technical performance of the volleyball players and the evaluation of the tactical performance of a volleyball team. A computer tool for evaluating the technical-tactical performance of volleyball players was developed. Through a computer program established in Microsoft Office Excel, which allowed registering and immediately accessing the necessary information during the development of a game. The variable of technical performance evaluation covers the following technical foundations, with their respective categorization of values. The tactical performance evaluation variable of the team was composed by the distribution of the raised, the technical efficiency percentage of the attack in k1 and k2, and the analysis of raised distribution and efficiency of attack by rotation. The program consists of 6 Excel books that work in an interrelated manner. The first five correspond to the sets played and the sixth corresponds to the summary of all the information entered. The match data were entered in the story sheet, to codify the technical-tactical situations of the game full. The sheets are divided into: Active (Final sheet, general sheet, difference sheet, atqefi sheet, atqk2 analysis sheet and summary sheet per player), Intermediate (Data and ATAQRSM), and Passive (Tables). The instrument of statistical evaluation of the technical-tactical performance of volleyball players serves as a contribution to the entire national volleyball environment, for its development in the field of objective evaluation of technical performances. This instrument its low cost and easy operation are strengths that will benefit all those coaches that use it.

scholarly journals Preseason to Postseason Changes on the BTrackS Force Plate in a Sample of College Athletes

2020 ◽  
Vol 29 (1) ◽  
pp. 134-136
Author(s):  
Ryan Morrison ◽  
Kyle M. Petit ◽  
Chris Kuenze ◽  
Ryan N. Moran ◽  
Tracey Covassin
Keyword(s):  
Athletic Training ◽  
Path Length ◽  
College Athletes ◽  
Center Of Pressure ◽  
Low Cost ◽  
Force Plate ◽  
Minimal Detectable Change ◽  
Detectable Change ◽  
Competitive Season ◽  
Significant Difference

Context: Balance testing is a vital component in the evaluation and management of sport-related concussion. Few studies have examined the use of objective, low-cost, force-plate balance systems and changes in balance after a competitive season. Objective: To examine the extent of preseason versus postseason static balance changes using the Balance Tracking System (BTrackS) force plate in college athletes. Design: Pretest, posttest design. Setting: Athletic training facility. Participants: A total of 47 healthy, Division-I student-athletes (33 males and 14 females; age 18.4 [0.5] y, height 71.8 [10.8] cm, weight 85.6 [21.7] kg) participated in this study. Main Outcome Measures: Total center of pressure path length was measured preseason and postseason using the BTrackS force plate. A Wilcoxon signed-rank test was conducted to examine preseason and postseason changes. SEM and minimal detectable change were also calculated. Results: There was a significant difference in center of pressure path length differed between preseason (24.6 [6.8] cm) and postseason (22.7 [5.4] cm) intervals (P = .03), with an SEM of 3.8 cm and minimal detectable change of 10.5 cm. Conclusions: Significant improvements occurred for center of pressure path length after a competitive season, when assessed using the BTrackS in a sample of college athletes. Further research is warranted to determine the effectiveness of the BTrackS as a reliable, low-cost alternative to force-plate balance systems. In addition, clinicians may need to update baseline balance assessments more frequently to account for improvements.

Rapid tooling using 3D printing system for manufacturing of customized tracheal stent

2014 ◽  
Vol 20 (1) ◽  
pp. 2-12 ◽  
Author(s):  
Evila L. Melgoza ◽  
Guillem Vallicrosa ◽  
Lidia Serenó ◽  
Joaquim Ciurana ◽  
Ciro A. Rodríguez
Keyword(s):  
Open Source ◽  
Fused Deposition Modeling ◽  
Tool Path ◽  
Low Cost ◽  
Integrated System ◽  
Medical Doctors ◽  
Content Type ◽  
Tracheal Stent ◽  
Fused Deposition ◽  
Medical Grade

Purpose – This work aims to present the design of a new continuous tool-path strategy for open-source low-cost fused deposition modeling (FDM) machines, such as Fab@Home or RepRap; and the development of an innovative integrated tool to design and fabricate customized tracheal stents with any FDM machine and six patient parameters. Both contributions were validated and implemented by obtaining a customized medical-grade silicone tracheal stent. Design/methodology/approach – For the design of the new deposition strategy, a Python programming language was used. The new tool-path strategy was proposed as a continuous path to avoid drops and gaps and to improve the accuracy of the final model. Meanwhile, patient parameters were obtained by medical doctors and introduced into the innovative integrated system. On the one hand, one mold generated automatically, and viewed with Matlab® software, was fabricated with a Fab@Home machine, optimized with the continuous tool-path strategy. On the other hand, the same generated mold was viewed in SolidWorks/Excel software and was fabricated using a commercial FDM machine. Finally, the mold was filled with medical grade silicone, and a silicone tracheal stent was obtained. Findings – Path planning for extrusion technologies is still a major concern, especially for open-source FDM machines. The results obtained in this work show the benefits of applying the newly developed continuous tool-path strategy to optimize the performance and efficiency of these machines. In addition, the proposed innovative integrated system allows the fabrication of customized tracheal stents rapidly and affordably. Practical implications – The possibility of obtaining customized tracheal stents is a worthy challenge. Medical doctors could play a more active role and interact during the design process, helping to obtain more suitable stents. The method proposed herein would provide the opportunity to obtain real values from the trachea of a patient in the operating room and quickly fabricate a customized stent that would fit the patient's trachea perfectly. Originality/value – The results obtained in this work are relevant and have future applications in both the medical and the additive manufacturing fields. The optimized tool-path strategy can help to improve and enhance the use of low-cost FDM machines. Moreover, the innovative automatic design approach to fabricate tracheal stents may open new market opportunities in the medical device field.

Comparison of body sway measured by a markerless low-cost motion sensor and by a force plate

2021 ◽  
Vol 37 (3) ◽  
pp. 507-517
Author(s):  
Diego Ramon Gonçalves Gonzalez ◽  
Luis Aureliano Imbiriba ◽  
Frederico Caetano Jandre
Keyword(s):  
Low Cost ◽  
Force Plate ◽  
Body Sway ◽  
Motion Sensor

Intrarater Reproducibility and Validity of Nintendo Wii Balance Testing in Community-Dwelling Older Adults

2014 ◽  
Vol 22 (2) ◽  
pp. 269-275 ◽  
Author(s):  
Martin G. Jorgensen ◽  
Uffe Laessoe ◽  
Carsten Hendriksen ◽  
Ole B.F. Nielsen ◽  
Per Aagaard
Keyword(s):  
Older Adults ◽  
Concurrent Validity ◽  
Low Cost ◽  
Force Plate ◽  
Community Dwelling ◽  
Nintendo Wii ◽  
Balance Testing ◽  
Valid Test ◽  
Plate Analysis ◽  
Community Dwelling Older Adults

The aims of the current study were to examine the intrarater intersession reproducibility of the Nintendo Wii agility and stillness tests and explore the concurrent validity in relation to gold-standard force-plate analysis. Within-day intersession reproducibility was examined in 30 older adults (age 71.8 ± 5.1 yr). No systematic test–retest differences were found for the Wii stillness test; however, the Wii agility test scores differed systematically between test sessions (p< .05). The Wii stillness test yielded a test–retest ICC of .86 (95% CI 0.74–0.93), CV of 6.4%, LOA of 11.0, and LOA% of 17.9%. Likewise for the Wii agility test ICC was .73 (95% CI 0.50-0.86), CV 5.3%, LOA 1.8, and LOA% of 14.6%. Wii stillness scores correlated to force plate measures (r= .65–.82,p< .01), reflecting moderate to excellent validity. In conclusion, it appears that the Wii stillness test represents a low-cost, objective, reproducible, and valid test of undisturbed postural balance in community-dwelling older adults.

scholarly journals Objective Evaluation of Visual Fatigue for Reading of Radiographs Displayed on Medical-grade Liquid-crystal Displays

2010 ◽  
Vol 66 (11) ◽  
pp. 1416-1422 ◽  
Author(s):  
Keita Takahashi ◽  
Junji Morishita ◽  
Hiroyuki Tashiro ◽  
Yasuhiko Nakamura
Keyword(s):  
Liquid Crystal ◽  
Objective Evaluation ◽  
Liquid Crystal Displays ◽  
Visual Fatigue ◽  
Medical Grade

Feasibility of a Low-Cost, Interactive Gaming System to Assess Balance in Older Women

2016 ◽  
Vol 24 (1) ◽  
pp. 111-118 ◽  
Author(s):  
Courtney D. Hall ◽  
Carolyn K. Clevenger ◽  
Rachel A. Wolf ◽  
James S. Lin ◽  
Theodore M. Johnson ◽  
...  
Keyword(s):  
Older Women ◽  
Low Cost ◽  
Force Plate ◽  
Community Dwelling ◽  
Strongly Correlated ◽  
Good Reliability ◽  
Wii Fit ◽  
Research Grade ◽  
Balance Rehabilitation ◽  
Balance Board

The use of low-cost interactive game technology for balance rehabilitation has become more popular recently, with generally good outcomes. Very little research has been undertaken to determine whether this technology is appropriate for balance assessment. The Wii balance board has good reliability and is comparable to a research-grade force plate; however, recent studies examining the relationship between Wii Fit games and measures of balance and mobility demonstrate conflicting findings. This study found that the Wii Fit was feasible for community-dwelling older women to safely use the balance board and quickly learn the Wii Fit games. The Ski Slalom game scores were strongly correlated with several balance and mobility measures, whereas Table Tilt game scores were not. Based on these findings, the Ski Slalom game may have utility in the evaluation of balance problems in community-dwelling older adults.

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