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Safety considerations for forward falls.

Authors
  • Abdolshah, Saeed1
  • Rajaei, Nader1
  • Akiyama, Yasuhiro1
  • Yamada, Yoji1
  • Okamoto, Shogo1
  • 1 Department of Mechanical Systems Engineering, Nagoya University, Nagoya, Japan. , (Japan)
Type
Published Article
Journal
Journal of musculoskeletal & neuronal interactions
Publication Date
Jun 01, 2020
Volume
20
Issue
2
Pages
176–184
Identifiers
PMID: 32481233
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Forward falls are among the most frequent causes of upper extremity fractures. This study investigated the safety considerations to prevent wrist injuries during bimanual forward falls. A biomechanical model was developed with two separated arms to facilitate investigation of asymmetrical contact and predict the impact force applied to each hand separately. To validate the developed model, a series of fall experiments were conducted in which one hand collided with a hard surface, while the other collided with a soft surface. The results show that the impact force applied to each hand is independent of the other. Using these results and our model, the safety aspects of human forward falls were analyzed with a view to preventing injuries. Specifically, we sought to determine the safe range of surface stiffness and damping to ensure that the occurrence of forward falls does not lead to trauma. The results of this study can be applied in the design of compliant flooring to ensure the safety of people in environments with potential fall hazards. From a robotics viewpoint, the results are applicable in the design of compliant flooring for shared workplaces, where robots collaborate with people and collisions between humans and robots may cause falls.

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