Portable instrument for accurate measurement of plantar force distribution during dynamic activities

1995 ◽  
Vol 33 (4) ◽  
pp. 618-621 ◽  
Author(s):  
F. Tokita ◽  
K. Yamakoshi ◽  
T. Sasaki ◽  
S. Ishii
Keyword(s):  
Force Distribution ◽  
Portable Instrument ◽  
Plantar Force

Comparison of Ice Versus Treadmill Skating — Plantar Force Distribution Patterns

2008 ◽  
pp. 265-265-7 ◽  
Author(s):  
RA Turcotte ◽  
DJ Pearsall ◽  
DL Montgomery ◽  
R Lefebvre ◽  
D Ofir ◽  
...  
Keyword(s):  
Distribution Patterns ◽  
Force Distribution ◽  
Plantar Force

scholarly journals Effect of two Backpack Designs on Cop Displacement and Plantar Force Distribution in Children during Upright Stance

2016 ◽  
Vol 23 (3) ◽  
pp. 123-126
Author(s):  
Andrzej Mastalerz ◽  
Tomasz Niźnikowski ◽  
Mariusz Buszta ◽  
Paweł Różański ◽  
Paweł Wiśniowski ◽  
...  
Keyword(s):  
Standing Position ◽  
Force Distribution ◽  
Centre Of Pressure ◽  
Upright Stance ◽  
School Students ◽  
Regular School ◽  
Look Ahead ◽  
Main Compartment ◽  
Plantar Force ◽  
Backpack Load

AbstractIntroduction. Many studies have compared different backpack designs and their influence on the carrier; however, no data referring to school students aged 7-8 years are currently available. Therefore, the aim of the research was to assess the influence of backpack design on centre of pressure (COP) displacement and plantar force distribution in children during an upright stance. Material and methods. Nineteen school students (9 males and 10 females) volunteered for the study. Two Polish backpacks intended for school use were evaluated: backpack A, which had two main compartments, and backpack B, which had one main compartment. The backpack load was composed of books, binders, and regular school equipment. During the measurements, the subjects were asked to look ahead with the head straight and arms at the sides in a comfortable position and to stand barefoot on the F-Scan®sensors (Tekscan, F-Scan®) attached to the force platform (Kistler), carrying a load corresponding to 10% of their body mass. Results. The study found insignificant differences between the two backpack designs. Moreover, COP parameters increased significantly during an upright stance while carrying backpack B in comparison to the empty backpack condition. Additionally, we observed significantly higher values of plantar force distribution in the heel region for the condition without load and insignificantly higher ones for carrying backpack A. Conclusions. The results of the current study suggest that the differences between the two backpack designs are too marginal to be detected through COP displacement. Disturbances in plantar force distribution suggest a lack of posture control and a lower stability of the standing position with a backpack, but these disturbances were significant only when the backpack with one main compartment was used.

Foot Loading Associated with Barefoot, Shod, and Minimalist Running in Male Rearfoot Strikers

2020 ◽  
Vol 110 (6) ◽  
Author(s):  
Gauthier Debugne ◽  
Maarten Eerdekens ◽  
Helen Peters ◽  
Filip Staes ◽  
William Bertucii ◽  
...  
Keyword(s):  
Clinical Reasoning ◽  
Repeated Measures ◽  
Center Of Pressure ◽  
Force Distribution ◽  
Initial Contact ◽  
Contact Phase ◽  
Barefoot Running ◽  
Repeated Measures Analysis ◽  
Foot Loading ◽  
Plantar Force

Background We aimed to determine the center of pressure (COP) trajectories and regional pressure differences in natural rearfoot strikers while running barefoot, running with a minimalist shoe, and running with a traditional shoe. Methods Twenty-two male natural rearfoot strikers ran at an imposed speed along an instrumented runway in three conditions: barefoot, with a traditional shoe, and with a minimalist shoe. Metrics associated to the COP and regional plantar force distribution, captured with a pressure platform, were compared using one-way repeated-measures analysis of variance. Results The forefoot contact phase was found to be significantly shorter in the barefoot running trials compared with the shod conditions (P = .003). The initial contact of the COP was located more anteriorly in the barefoot running trials. The mediolateral position of the COP at initial contact was found to be significantly different in the three conditions, whereas the final mediolateral position of the COP during the forefoot contact phase was found to be more lateral in the barefoot condition compared with both shod conditions (P = .0001). The metrics associated with the regional plantar force distribution supported the clinical reasoning with respect to the COP findings. Conclusions The minimalist shoe seems to provide a compromise between barefoot running and running with a traditional shoe.

Troughing after Scarf Osteotomy Leads to Minimal Gait Alterations

2014 ◽  
Vol 601 ◽  
pp. 181-184
Author(s):  
Horia Hărăgus ◽  
Radu Prejbeanu ◽  
Dinu Vermesan ◽  
Ciprian Bogdan ◽  
Mirela Toth-Taşcău
Keyword(s):  
Hallux Valgus ◽  
Plantar Pressure ◽  
Force Distribution ◽  
Pressure Data ◽  
Scarf Osteotomy ◽  
Left And Right ◽  
Plantar Force ◽  
Force Data ◽  
Pressure Analysis

We aimed to investigate whether troughing during scarf osteotomy for hallux valgus can be determined using plantar pressure analysis. In order to quantify the foot print area of a patient at 7 and 12 weeks after the surgery, the raw pressure data were exported to two matrixes. Each matrix has the size of the force distribution platform and contains the plantar force data of the patient in gait movement. These large matrixes containing both left and right pressure data were divided in small size matrixes and averaged. The computation was done in Matlab. The matrixes were flipped up in order to have the natural position of the footprint. The two were plotted as contours in Z axis but kept the external contours only. This difference was measured by subtracting the areas of the two contours. The results are typical footprints for left and right legs, at predetermined follow-up points.

Influence of activity on plantar force distribution

1994 ◽  
Vol 9 (2) ◽  
pp. 130-132 ◽  
Author(s):  
C. Reinschmidt ◽  
B.M. Nigg ◽  
G.R. Hamilton
Keyword(s):  
Force Distribution ◽  
Plantar Force

Space creation, structural construction and force distribution

2013 ◽  
Vol 4 (1) ◽  
pp. 1-12
Author(s):  
G. Lámer
Keyword(s):  
The Other ◽  
Frame Structure ◽  
Force Distribution ◽  
Independent Components ◽  
Other Hand

Abstract The paper is an overview of issues related to the space creation of a building, possibilities of developing frame structure and connections of force distribution in the construction. In plane the force distribution can be compression, bending and tension. In space “enclosing” a geometric solid means space creation. In space as it is to be expected, the force distribution must be compression, bending and tension in two different directions at the same time. This can be really variant but in the case of surface or surface-like constructions generated by translations (and/or rotations) on one hand, there are some other surfaces, which cannot be generated by translations (and/or rotations), on the other hand, the dimension of the inside “forces” is not two but three (independent components of a two-by-two tensor either in the case of compression tension, or in the case of bending). By this, force distribution is more complicated in space than in plane.

The Driving Severity Number (DSN) — A Step Toward Quantifying Treadwear Test Conditions

1986 ◽  
Vol 14 (3) ◽  
pp. 139-159 ◽  
Author(s):  
A. G. Veith
Keyword(s):  
Signal Processing ◽  
Ambient Temperature ◽  
Lateral Acceleration ◽  
Force Distribution ◽  
Single Index ◽  
Tire Force ◽  
Test Conditions ◽  
Wheel Revolution ◽  
High Degree ◽  
Revolution Counter

Abstract A system, called the “Driving Severity Monitor” (DSM), has been developed for characterizing tire force distribution as related to treadwear in either normal tire use or in tire fleet testing in a convoy. The system consists of an accelerometer for monitoring lateral accelerations, a wheel revolution counter, and a module for signal processing and read-out. The output of the DSM is reduced to a single index, the Driving Severity Number (DSN), which characterizes a vehicle journey. The DSN is equal to the sum of squares of lateral acceleration measured once per tire revolution during a trip, divided by the number of wheel revolutions. The DSN had a high degree of correlation (R ≧ 0.95) with treadwear in two wear programs when pavement abrasiveness was held constant. This supports the concept that the three basic treadwear components: tire force distribution, pavement abrasiveness, and ambient temperature, can be separated for better understanding of tire treadwear.

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