Is A Force-Plate System As Effective As The FAB For Determining Fall Risk In Seniors?

2010 ◽  
Vol 42 ◽  
pp. 332
Author(s):  
Regina C. Schurman ◽  
Kelly A. Barnes ◽  
Edwin E. Robles ◽  
Craig E. Broeder
Keyword(s):  
Fall Risk ◽  
Force Plate ◽  
Plate System

scholarly journals Review of the Upright Balance Assessment Based on the Force Plate

2021 ◽  
Vol 18 (5) ◽  
pp. 2696
Author(s):  
Baoliang Chen ◽  
Peng Liu ◽  
Feiyun Xiao ◽  
Zhengshi Liu ◽  
Yong Wang
Keyword(s):  
Postural Balance ◽  
Force Plate ◽  
Assessment Method ◽  
Balance Assessment ◽  
Experimental Conditions ◽  
Methodological Research ◽  
Assessment Tests ◽  
Wide Range ◽  
Foot Posture ◽  
Plate System

Quantitative assessment is crucial for the evaluation of human postural balance. The force plate system is the key quantitative balance assessment method. The purpose of this study is to review the important concepts in balance assessment and analyze the experimental conditions, parameter variables, and application scope based on force plate technology. As there is a wide range of balance assessment tests and a variety of commercial force plate systems to choose from, there is room for further improvement of the test details and evaluation variables of the balance assessment. The recommendations presented in this article are the foundation and key part of the postural balance assessment; these recommendations focus on the type of force plate, the subject’s foot posture, and the choice of assessment variables, which further enriches the content of posturography. In order to promote a more reasonable balance assessment method based on force plates, further methodological research and a stronger consensus are still needed.

Development of an Embedded Microcomputer-based Force Plate System for Measuring Sow Weight Distribution and Detection of Lameness

2011 ◽  
Vol 27 (3) ◽  
pp. 475-482 ◽  
Author(s):  
G. Sun ◽  
R. F. Fitzgerald ◽  
K. J. Stalder ◽  
L. A. Karriker ◽  
A. K. Johnson ◽  
...  
Keyword(s):  
Weight Distribution ◽  
Force Plate ◽  
Plate System

scholarly journals Development of a Mobile Force Plate System

2012 ◽  
Vol 36 (4) ◽  
pp. 241-243 ◽  
Author(s):  
Yoshio INOUE ◽  
Tao LIU ◽  
Wataru ADACHI ◽  
Kyoko SHIBATA ◽  
Kozo SHIOJIMA ◽  
...  
Keyword(s):  
Force Plate ◽  
Plate System

scholarly journals Concurrent Validity of a Portable Force Plate Using Vertical Jump Force–Time Characteristics

2018 ◽  
Vol 34 (5) ◽  
pp. 410-413 ◽  
Author(s):  
Jason Lake ◽  
Peter Mundy ◽  
Paul Comfort ◽  
John J. McMahon ◽  
Timothy J. Suchomel ◽  
...  
Keyword(s):  
Concurrent Validity ◽  
Vertical Jump ◽  
Reaction Force ◽  
Force Plate ◽  
Vertical Force ◽  
Jump Height ◽  
Strength Index ◽  
Limits Of Agreement ◽  
Force Time ◽  
Plate System

This study examined concurrent validity of countermovement vertical jump reactive strength index modified and force–time characteristics recorded using a 1-dimensional portable and laboratory force plate system. Twenty-eight men performed bilateral countermovement vertical jumps on 2 portable force plates placed on top of 2 in-ground force plates, both recording vertical ground reaction force at 1000 Hz. Time to takeoff; jump height; reactive strength index modified; and braking and propulsion impulse, mean net force, and duration were calculated from the vertical force from both force plate systems. Results from both systems were highly correlated (r ≥ .99). There were small (d < 0.12) but significant differences between their respective braking impulse, braking mean net force, propulsion impulse, and propulsion mean net force (P < .001). However, limits of agreement yielded a mean value of 1.7% relative to the laboratory force plate system (95% confidence limits, 0.9%–2.5%), indicating very good agreement across all of the dependent variables. The largest limits of agreement were for jump height (2.1%), time to takeoff (3.4%), and reactive strength index modified (3.8%). The portable force plate system provides a valid method of obtaining reactive strength measures, and several underpinning force–time variables, from unloaded countermovement vertical jump. Thus, practitioners can use both force plates interchangeably.

611 Gait analysis and stability evaluation using a wearable force plate system

2010 ◽  
Vol 2010.48 (0) ◽  
pp. 181-182
Author(s):  
Yusuke HIROTA ◽  
Yoshio INOUE ◽  
Kyoko SHIBATA ◽  
Tao LIU ◽  
Kozo SHIOJIMA
Keyword(s):  
Gait Analysis ◽  
Force Plate ◽  
Stability Evaluation ◽  
Plate System

scholarly journals Gait analysis with large three-dimentional force plate system. Application to cerebral palsied children.

1990 ◽  
Vol 38 (4) ◽  
pp. 1801-1805
Author(s):  
Kuniyoshi Tsuchiya ◽  
Takayuki Satake ◽  
Tsuyoshi Ohta ◽  
Shuji Ikebe
Keyword(s):  
Gait Analysis ◽  
System Application ◽  
Force Plate ◽  
Plate System

Ground Reaction Forces during Human Locomotion on Railroad Ballast

2007 ◽  
Vol 23 (4) ◽  
pp. 322-329 ◽  
Author(s):  
Chip Wade ◽  
Mark S. Redfern
Keyword(s):  
Smooth Surface ◽  
Force Plate ◽  
Human Locomotion ◽  
Ground Reaction Forces ◽  
Surface Conditions ◽  
Time Histories ◽  
Reaction Forces ◽  
The Common ◽  
Plate System ◽  
Railroad Cars

Locomotion over ballast surfaces provides a unique situation for investigating the biomechanics of gait. Although much research has focused on level and sloped walking on a smooth, firm surface in order to understand the common kinematic and kinetic variables associated with human locomotion, the literature currently provides few if any discussions regarding the dynamics of locomotion on surfaces that are either rocky or uneven. The purpose of this study was to investigate a method for using force plates to measure the ground reaction forces (GRFs) during gait on ballast. Ballast is a construction aggregate of unsymmetrical rock used in industry for the purpose of forming track bed on which railway ties are laid or in yards where railroad cars are stored. It is used to facilitate the drainage of water and to create even running surfaces. To construct the experimental ballast surfaces, 31.75-mm (1¼-in.) marble ballast at depths of approximately 63.5 mm (2.5 in.) or 101.6 mm (4 in.) were spread over a carpeted vinyl tile walkway specially designed for gait studies. GRF magnitudes and time histories from a force plate were collected under normal smooth surface and under both ballast surface conditions for five subjects. GRF magnitudes and time histories during smooth surface walking were similar to GRF magnitudes and time histories from the two ballast surface conditions. The data presented here demonstrate the feasibility of using a force plate system to expand the scope of biomechanical analyses of locomotion on ballast surfaces.

A Comparison of Bilateral and Unilateral Drop Jumping Tasks in the Assessment of Vertical Stiffness

2018 ◽  
Vol 34 (3) ◽  
pp. 199-204
Author(s):  
Sean J. Maloney ◽  
Joanna Richards ◽  
Iain M. Fletcher
Keyword(s):  
Coefficient Of Variation ◽  
Center Of Mass ◽  
Reaction Force ◽  
Force Plate ◽  
Drop Height ◽  
Vertical Stiffness ◽  
Drop Jumps ◽  
Left And Right ◽  
Plate System ◽  
Healthy Males

This study sought to compare vertical stiffness during bilateral and unilateral drop jumping. Specifically, the intersession reliabilities and force-deformation profiles associated with each task were to be examined. On 3 occasions, following familiarization, 14 healthy males (age: 22 [2] y; height: 1.77 [0.08] m; and body mass: 73.5 [8.0] kg) performed 3 bilateral, left leg and right leg drop jumps. All jumps were performed from a drop height of 0.18 m on to a dual force plate system. Vertical stiffness was calculated as the ratio of peak ground reaction force (GRF) to the peak center of mass (COM) displacement. Unilateral drop jumping was associated with higher GRF and greater COM displacement (both Ps < .001), but vertical stiffness was not different between tasks when considering individual limbs (P = .98). A coefficient of variation of 14.6% was observed for bilateral vertical stiffness during bilateral drop jumping; values of 6.7% and 7.6% were observed for left and right limb vertical stiffness during unilateral drop jumping. These findings suggest that unilateral drop jumps may exhibit greater reliability than bilateral drop jumps while eliciting similar vertical stiffness. It is also apparent that higher GRFs during unilateral drop jumping are mitigated by increased COM displacement.

Predictive models of lameness in dairy cows achieve high sensitivity and specificity with force measurements in three dimensions

2015 ◽  
Vol 82 (4) ◽  
pp. 391-399 ◽  
Author(s):  
Jason Dunthorn ◽  
Robert M Dyer ◽  
Nagaraj K Neerchal ◽  
Jonathan S McHenry ◽  
Parimal G Rajkondawar ◽  
...  
Keyword(s):  
Force Plate ◽  
High Sensitivity ◽  
Clinical Mastitis ◽  
Three Dimensions ◽  
Receiver Operating Curve ◽  
Force Measurements ◽  
Detection Systems ◽  
Reaction Forces ◽  
Sensitivity Specificity ◽  
Plate System

Lameness remains a significant cause of production losses, a growing welfare concern and may be a greater economic burden than clinical mastitis . A growing need for accurate, continuous automated detection systems continues because US prevalence of lameness is 12·5% while individual herds may experience prevalence's of 27·8–50·8%. To that end the first force-plate system restricted to the vertical dimension identified lame cows with 85% specificity and 52% sensitivity . These results lead to the hypothesis that addition of transverse and longitudinal dimensions could improve sensitivity of lameness detection. To address the hypothesis we upgraded the original force plate system to measure ground reaction forces (GRFs) across three directions. GRFs and locomotion scores were generated from randomly selected cows and logistic regression was used to develop a model that characterised relationships of locomotion scores to the GRFs. This preliminary study showed 76 variables across 3 dimensions produced a model with greater than 90% sensitivity, specificity, and area under the receiver operating curve (AUC). The result was a marked improvement on the 52% sensitivity, and 85% specificity previously observed with the 1 dimensional model  or the 45% sensitivities reported with visual observations. Validation of model accuracy continues with the goal to finalise accurate automated methods of lameness detection.

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