Abstract
AbstractThis study investigates human maximum horizontal isometric pushing strength and rearward foot position while pushing at four different exertion heights (48 cm, 84 cm, 120 cm, and 156 cm) and two exertion spaces (unrestricted and restricted). The restricted space was reduced to an anterior–posterior direction. The results showed that participants' most efficient exertion height and rearward foot position occurred invariably at an exertion height of 84 cm when pushing in an unrestricted exertion space. Restricted space impaired the pushing strength, with a maximal difference of pushing strength between unrestricted and restricted spaces also occurring at the exertion height of 84 cm. The percentages of female to male pushing strength varied little across the four exertion heights. Participants seemed to be prone to utilize only approximately 71% to 82% of the exertion space available while pushing in a restricted space. © 2007 Wiley Periodicals, Inc. Hum Factors Man 17: 95–102, 2007.
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