The influence of seat backrest angle on human performance during whole-body vibration

被引:15
作者
Paddan, G. S. [1 ]
Holmes, S. R. [2 ]
Mansfield, N. J. [3 ]
Hutchinson, H. [2 ]
Arrowsmith, C. I. [2 ]
King, S. K. [2 ]
Jones, R. J. M. [2 ]
Rimell, A. N. [3 ]
机构
[1] Inst Naval Med, Gosport PO12 2DL, Hants, England
[2] QinetiQ, Farnborough, Hants, England
[3] Univ Loughborough, Loughborough Design Sch, Loughborough, Leics, England
关键词
whole-body vibration; human performance; backrest angle; tracking; reaction time; CONTINUOUS MANUAL CONTROL; TRANSMISSION; HEAD;
D O I
10.1080/00140139.2011.634030
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This study investigated the effects of reclined backrest angles on cognitive and psycho-motor tasks during exposure to vertical whole-body vibration. Twenty participants were each exposed to three test stimuli of vertical vibration: 28 Hz; 8-14 Hz and 14-20 Hz, plus a stationary control condition whilst seated on a vibration platform at five backrest angles: 08 (recumbent, supine) to 908 (upright). The vibration magnitude was 2.0 ms(-2) root-mean-square. The participants were seated at one of the backrest angles and exposed to each of the three vibration stimuli while performing a tracking and choice reaction time tasks; then they completed the NASA-TLX workload scales. Apart from 22.5 degrees seat backrest angle for the tracking task, backrest angle did not adversely affect the performance during vibration. However, participants required increased effort to maintain performance during vibration relative to the stationary condition. These results suggest that undertaking tasks in an environment with vibration could increase workload and risk earlier onset of fatigue. Practitioner Summary Current vibration standards provide guidance for assessing exposures for seated, standing and recumbent positions, but not for semi-recumbent postures. This paper reports new experimental data systematically investigating the effect of backrest angle on human performance. It demonstrates how workload is elevated with whole-body vibration, without getting affected by backrest angle.
引用
收藏
页码:114 / 128
页数:15
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