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Related Experiment Videos

Forces applied to large hand wheels.

J C Woldstad1, M L McMulkin, C A Bussi

  • 1Industrial Ergonomics Laboratory, Department of Industrial and Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0118, USA.

Applied Ergonomics
|February 1, 1995
PubMed
Summary

This study measured isometric hand wheel strength in 250 adults, finding grip type significantly impacts force output. Standard strength tests effectively predict hand wheel capabilities.

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Area of Science:

  • Ergonomics
  • Biomechanics
  • Human Factors Engineering

Background:

  • Assessing population isometric strength is crucial for designing safe and effective human-machine interfaces.
  • Understanding hand wheel force capabilities is relevant for tasks like operating heavy machinery.

Purpose of the Study:

  • To establish population isometric strength capabilities for hand wheel operation.
  • To investigate the influence of grip configuration and measurement method on hand wheel force generation.

Main Methods:

  • 125 males and 125 females performed isometric hand wheel force tasks.
  • Two grip configurations (rim and spoke) and two measurement procedures (3s average and ramp to max) were employed.
  • Standardized whole-body strength measures were also recorded.

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Main Results:

  • Average tangential forces varied significantly based on grip and measurement method, ranging from 393-614 N for males and 235-348 N for females.
  • Grip characteristics and grip strength were identified as key determinants of isometric wheel force.
  • Whole-body strength measures showed predictive validity for hand wheel strength.

Conclusions:

  • Grip configuration and measurement technique substantially influence isometric hand wheel strength.
  • Standard strength assessments can predict performance in hand wheel tasks.
  • Findings have implications for ergonomic design and occupational safety assessments.