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Analytical characterization of movements of the spinal column and risk assessment due to repeated movements of the upper limbs of building painters

Antonucci A., Forcella L., Bonfiglioli R., Boscolo P., Violante S. V.

International Journal of Occupational Safety and Ergonomics

2016

Vol. 22, No. 3

340--349

Manual activities of construction workers may induce musculoskeletal disorders. This study on a group of painters aimed to analytically characterize movements of the spinal column by both lumbar motion monitor and television cameras and to determine, using the Occupational Repetitive Actions (OCRA) Index method, the risk exerted by repeated movements of the upper limbs. The main results are: painting with a roller generally exposes workers to a lesser risk for upper limbs than painting with a brush; a roller-stick fixed at the wrong length can lead to stretching of the back at lumbar and cervical levels; to remain within the range of ‘acceptable risk’ (OCRA Index evaluation), a worker should not paint a vertical wall for over 3 h if using a roller and 2.5 h if painting with a brush; and, on average, a painter who paints for 5 h in a day lifts the bucket about 120,140 times.

Quantitative comparison of marker attachment methods for hand motion analysis

Lee K. S., Jung M.- C.

International Journal of Occupational Safety and Ergonomics

2015

Vol. 21, No. 1

30--38

The purpose of this study was to compare and quantify the angle difference among marker attachment methods for kinematic evaluation. For static evaluation, a hand mock-up was designed and used in single trials of different marker attachment methods. The mean absolute angle difference between the marker attachment methods and hand mock-up was not statistically significant. For dynamic evaluation, the gripping task began when a participant gripped a cylinder. The main effect of the marker set (p < .049) was significant. Thus, the use of one marker per joint is recommended for static evaluation because it causes less discomfort when a patient moves his/her hand and because utilizing the same marker placements for each subject is easy. For dynamic evaluation, the use of three markers per segment or a cluster marker is recommended because they are less affected by skin movement.