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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

How is a box handled when all surfaces can be freely held?

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Author(s):
Oliveira, A. B. [1] ; Silva, L. C. C. B. [1] ; Palinkas, E. S. L. [1] ; Padula, R. S. [2, 3] ; Coury, H. J. C. G. [1]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos UFSCar, Dept Phys Therapy, Sao Carlos, SP - Brazil
[2] Univ Cidade Sao Paulo UNICID, Masters Phys Therapy Program, Sao Paulo - Brazil
[3] Univ Sao Francisco, Dept Physiotherapy, BR-12900000 Braganca Paulista, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: ERGONOMICS; v. 55, n. 1, p. 78-86, 2012.
Web of Science Citations: 1
Abstract

In this study, we investigated how experienced and inexperienced subjects handle a box when it could be approached from any of its sides. Subjects moved a box (11 kg) either to a high (HS) or a low surface (LS). Wrist movements and grip force were synchronised and recorded, respectively, by electrogoniometers and an instrumented box. All subjects adopted a lateral-and-bottom grip, with parts of the hands simultaneously placed on the side and bottom of the box. This grip allowed the 50th percentile of wrist movements to be within safe limits, particularly in the sagittal plane. Low force was associated with lowering the box to LS and equally distributed but greater force when lifting to HS. Larger ulnar deviation was recorded when the box was lifted to HS. Only peak of wrist extension differentiated experienced from inexperienced subjects, with experienced presenting larger wrist extension. Alternative box designs are suggested to improve handling in real settings. Practitioner Summary Understanding worker preferences for box lifting behaviour can contribute to the development of new designs that facilitate the adoption of more efficient postures while reducing the risk of upper-limb musculoskeletal disorders and promoting safer manual material handling. (AU)

FAPESP's process: 08/10372-4 - Shoulder and neck movement evaluation in electricians during occupational activities
Grantee:Helenice Jane Cote Gil Coury
Support Opportunities: Regular Research Grants