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2 2016

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Foot model for tracking temperature of safety boot insoles: application to different insole materials in firefighter boots

Garcia-Hernandez C., Sanchez-Alvarez E. J., Huertas-Talon J.-L.

International Journal of Occupational Safety and Ergonomics

2016

Vol. 22, No. 1

12--19

This research is based on the development of a human foot model to study the temperature conditions of a foot bottom surface under extreme external conditions. This foot model is made by combining different manufacturing techniques to enable the simulation of bones and tissues, allowing the placement of sensors on its surface to track the temperature values of different points inside a shoe. These sensors let researchers capture valuable data during a defined period of time, making it possible to compare the features of different safety boots, socks or soles, among others. In this case, it has been applied to compare different plantar insole materials, placed into safety boots on a high-temperature surface.

Effects of customized foot orthoses on manufacturing workers in the metal industry

Garcia-Hernandez C., Huertas-Talon J.-L., Sanchez-Alvarez E. J., Marin-Zurdo J.

International Journal of Occupational Safety and Ergonomics

2016

Vol. 22, No. 1

116--124

This 8-week study evaluates the effects of customized foot orthoses on work-related musculoskeletal disorders (WMSDs) of metal industry workers. These WMSDs were evaluated applying the Nordic musculoskeletal questionnaire (NMQ) at three different times (start, 4th week and 8th week) and additional questions were also formulated to obtain information about adaptation, fatigue, comfort and possible improvements. According to the NMQ results, statistical significance was found in the improvements after 4 weeks (p < 0.05 in two areas, p < 0.01 in three areas, p < 0.001 in two areas and no significance in the other two) and after 8 weeks (p < 0.01 in three areas, p < 0.001 in four areas and no significance in the other two). The additional questions indicated fatigue reduction (both in general and in lower extremity), comfort level increase (after the adaptation period) and good acceptance, according to workers’ answers, suggesting customized orthoses can be effective in reducing and preventing WMSDs in several body regions.