Reach Capability of Men and Women: A Three-Dimensional Analysis

Kennedy, Kenneth W.

doi:10.21236/ada060312

Cited by 27 publications

(10 citation statements)

References 8 publications

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“…The upper extremity 3D reachable workspace reconstruction by the Kinect system, based on arm movement, followed the previously published protocol (Fig. ) . Assessment of each limb took approximately 1 minute using the methods we described elsewhere.…”

Section: Methodsmentioning

confidence: 99%

“…The Kinect‐based system enables quick and reproducible upper extremity motion capture with accurate and reliable reconstruction of the 3D reachable workspace. One of the earliest applications of reachable workspace was in ergonomics, where it was used to evaluate and design pilot workspace in an airplane . Later the concept was developed as a functional measure of the upper extremity based on kinematic and goniometry information.…”

mentioning

confidence: 99%

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Upper extremity 3-dimensional reachable workspace assessment in amyotrophic lateral sclerosis by Kinect sensor

et al. 2015

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Introduction Reachable workspace is a measure that provides clinically meaningful information regarding arm function. In this study, a Kinect sensor was used to determine the spectrum of 3D reachable workspace encountered in a cross-sectional cohort of individuals with ALS. Method Bilateral 3D reachable workspace was recorded from 10 subjects with ALS and 23 healthy controls. The data were normalized by each individual's arm length to obtain a reachable workspace relative surface area (RSA). Concurrent validity was assessed by correlation with ALSFRSr scores. Results The Kinect-measured reachable workspace RSA differed significantly between the ALS and control subjects (0.579±0.226 vs. 0.786±0.069; P<0.001). The RSA demonstrated correlation with ALSFRSr upper extremity items (Spearman correlation ρ=0.569; P=0.009). With worsening upper extremity function as categorized by the ALSFRSr, the reachable workspace also decreased progressively. Conclusions This study demonstrates the feasibility and potential of using a novel Kinect-based reachable workspace outcome measure in ALS.

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Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Upper extremity 3-dimensional reachable workspace assessment in amyotrophic lateral sclerosis by Kinect sensor

et al. 2015

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“…The maximum reach envelope (MRE) is a common reach measure in design layouts for automobile and aircraft interior and workstations (Chaffin et al, 2000; Faulkner & Day, 1970; Kennedy, 1978 ). The MRE is defined as an outer boundary of the volume of space accessed by a touch, grip, or pinch action performed with an extended arm and minimal elbow or trunk movement (Kennedy, 1978).…”

Section: Introductionmentioning

confidence: 99%

Comparison Considerations Toward Investigating the Factors of Load and Age Group on the Maximum Reach Envelope

2020

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Objective The objectives were to compare cylindrical and spherical coordinate representations of the maximum reach envelope (MRE) and apply these to a comparison of age and load on the MRE. Background The MRE is a useful measurement in the design of workstations and quantifying functional capability of the upper body. As a dynamic measure, there are human factors that impact the size, shape, and boundaries of the MRE. Method Three-dimensional reach measures were recorded using a computerized potentiometric system for anthropometric measures (CPSAM) on two adult groups (aged 18–25 years and 35–70 years). Reach trials were performed holding .0, .5, and 1 kg. Results Three-dimensional Cartesian coordinates were transformed into cylindrical ( r, θ , Z) and spherical ( r, θ, ϕ) coordinates. Median reach distance vectors were calculated for 54 panels within the MRE as created by incremented banding of the respective coordinate systems. Reach distance and reach area were compared between the two groups and the loaded conditions using a spherical coordinate system. Both younger adults and unloaded condition produced greater reach distances and reach areas. Conclusions Where a cylindrical coordinate system may reflect absolute reference for design, a normalized spherical coordinate system may better reflect functional range of motion and better compare individual and group differences. Age and load are both factors that impact the MRE. Application These findings present measurement considerations for use in human reach investigation and design.

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“…The maximum workspace data most commonly cited were recorded for an aircraft pilot's workstation (Kennedy 1978). However, for general industrial applications, such data cannot be used, because the seating posture of a pilot is different from an industrial worker.…”

Section: Introductionmentioning

confidence: 99%

Anthropometric modelling for the determination of 3-D maximum functional reach

Behara

Das

2011

Theoretical Issues in Ergonomics Science

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Maximum functional reach for 3-D industrial workspace was determined from selected structural body dimensions. Six structural body dimensions out of 19 measured in this study were found to be dominant and statistically related to the functional reach in the spectrum of the workspace. Next to arm length, the most dominant body dimension was popliteal height for the male and stature for the female. The other dominant body dimensions were: (a) slump eye height and thigh clearance for both sexes; (b) stature and forearm-hand length for the male; (c) shoulder height and slumped shoulder height for the female. Multiple regression models were built and validated using the dominant body dimensions as the independent variables for the determination of the functional maximum reach distances of each participant in the workspace. The probability of rejection for any of the models was 0.01. The standard error for all models varied from 22 to 59 mm. The comparison of the observed and estimated volume of the maximum (3-D) workspace revealed that for the male sample, the estimation error was within AE9.5% and the corresponding error for the female sample was AE10.5%. The estimation method developed in this study provides an alternative to more time-consuming and difficult methods to empirically determine the reach envelope of an operator.

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Reach Capability of Men and Women: A Three-Dimensional Analysis

Cited by 27 publications

References 8 publications

Upper extremity 3-dimensional reachable workspace assessment in amyotrophic lateral sclerosis by Kinect sensor

Upper extremity 3-dimensional reachable workspace assessment in amyotrophic lateral sclerosis by Kinect sensor

Comparison Considerations Toward Investigating the Factors of Load and Age Group on the Maximum Reach Envelope

Anthropometric modelling for the determination of 3-D maximum functional reach

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