30o inclination in handles of plastic boxes can reduce postural and muscular workload during handling
Braz. j. phys. ther. (Impr.)
;
17(3): 307-318, jun. 2013. tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-680661
ABSTRACT
BACKGROUND:
The handling of materials, which occurs in the industrial sector, is associated with lesions on the lumbar spine and in the upper limbs. Inserting handles in industrial boxes is a way to reduce work-related risks. Although the position and angle of the handles are significant factors in comfort and safety during handling, these factors have rarely been studied objectively.OBJECTIVE:
To compare the handling of a commercial box and prototypes with handles and to evaluate the effects on upper limb posture, muscle electrical activity, and perceived acceptability using different grips while handling materials from different heights.METHOD:
Thirty-seven healthy volunteers evaluated the handles of prototypes that allowed for changes in position (top and bottom) and angle (0°, 15°, and 30°). Wrist, elbow, and shoulder movements were evaluated using electrogoniometry and inclinometry. The muscle electrical activity in the wrist extensors, biceps brachii, and the upper portion of the trapezius was measured using a portable electromyographer. The recorded data on muscle movements and electrical activity were synchronized. Subjective evaluations of acceptability were evaluated using a visual analog scale. RESULTS ANDCONCLUSIONS:
The prototypes with handles at a 30° angle produced the highest acceptability ratings, more neutral wrist positions, lower levels of electromyographic activity for the upper trapezius, and lower elevation angles for the arms. The different measurement methods were complementary in evaluating the upper limbs during handling. .
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Postura
/
Suporte de Carga
/
Remoção
/
Músculo Esquelético
/
Extremidade Superior
/
Ergonomia
Limite:
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Braz. j. phys. ther. (Impr.)
Assunto da revista:
MEDICINA FISICA E REABILITACAO
Ano de publicação:
2013
Tipo de documento:
Artigo
/
Documento de projeto
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Federal de Sao Carlos/BR
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