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Sustained Operations in Confined-Space Military Vehicles

Delleman N. J., Colaciuri V., Wiederkehr E., Valk P. J. L.

International Journal of Occupational Safety and Ergonomics

2008

Vol. 14, No. 3

313--325

This paper reports 2 baseline studies and 1 experiment performed in a confined-space military vehicle concerning the effects on fitness and performance of time in a sitting posture and workstation characteristics. On average physical fitness decreased by slightly more than 10% per hour, the observation performance decreased by ~30% per hour, and the technical performance (of gunners) showed a relatively small decrease, i.e., less than 5% per hour. So-called active breaks (changing sitting into standing and walking) led to a significant reduction in the decrease of physical fitness, almost reducing it to zero. Furthermore, the level of confinement was shown to affect physical fitness.