Evaluation of reaction time performance and subjective workload during whole-body vibration exposure while seated in upright and twisted postures with and without armrests

Newell, Geraldine S.; Mansfield, Neil J.

doi:10.1016/j.ergon.2007.08.018

Cited by 81 publications

(62 citation statements)

References 20 publications

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“…For investigation of these two exposures, several measuring techniques and evaluation methods have been introduced for both laboratory and field measurements. Laboratory studies 3) show that a greater workload and a severe decrease in performance is experienced when subjects are seated in a twisted posture with no armrest support.…”

Section: Introductionmentioning

confidence: 99%

Assessing Combined Exposures of Whole-body Vibration and Awkward Posture― Further Results from Application of a Simultaneous Field Measurement Methodology

et al. 2010

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The drivers of ten vehicles (tram, helicopter, saloon car, van, forklift, two mobile excavators, wheel loader, tractor, elevating platform truck) were studied with regard to the combined exposures of whole-body vibration and awkward posture during occupational tasks. Seven degrees of freedom (DOFs), or body angles, were recorded as a function of time by means of the CUELA measuring system (Computer-assisted registration and long-term analysis of musculoskeletal workloads) for the purpose of posture assessment. The vibrational exposure is expressed as the vector sum of the frequency-weighted accelerations in the three Cartesian coordinates; these were recorded simultaneously with the posture measurement. Based upon the percentage of working time spent under different workloads, a scheme is proposed for classification of the two exposures into three categories. In addition, a risk of adverse health effects classified as low, possible or high can be assigned to the combination of the two exposures. With regard to posture, the most severe exposure was measured for the drivers of the wheel loader and for the tractor driver, whereas the lowest exposure was measured for the helicopter pilots and van drivers. With regard to the combination of whole-body and posture exposures, the tractor driver and the elevating platform truck driver exhibited the highest workloads.

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Section: Introductionmentioning

confidence: 99%

Assessing Combined Exposures of Whole-body Vibration and Awkward Posture― Further Results from Application of a Simultaneous Field Measurement Methodology

et al. 2010

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“…The results indicated that low levels of vibration did not adversely affect performance when using these computer devices. However, other studies have shown that it is possible to compensate for disturbances due to WBV, maintaining task performance, but at the cost of increases in mental and physical workload (Conway et al, 2007;Newell and Mansfield, 2008).…”

Section: Introductionmentioning

confidence: 99%

Effects of horizontal whole-body vibration and standing posture on activity interference

Baker

Mansfield

2010

Ergonomics

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Standing people are exposed to whole-body vibration in many environments. This paper investigates the effects of horizontal whole-body vibration and standing posture on task performance. Sixteen participants were exposed to random vibration (up to 4Hz), whilst performing a timed pegboard task in two standing postures. Objective and subjective indicators of performance were used. Time taken to complete the task increased progressively with increases in vibration magnitude; the fore-and-aft posture generally showed greater performance decrements and postural interruptions (>1.0ms -2 r.m.s.) than the lateral. For both postures, performance was better during yaxis vibration than during x-axis vibration. Subjective ratings showed similar trends to time data. Impairments due to dual axis exposure were well predicted using r.s.s.summation calculations based on single axis components. These results indicate that best performance for those standing in moving environments will be achieved if individuals adopt a lateral posture with the most severe vibration in the y-axis.2 Statement of relevancePeople have a need to work during transportation either working for the transport provider or as a passenger. All modes of transport result in travellers being exposed to horizontal motion. This study demonstrates that task disturbance is affected by the orientation of the standing person to the vibration and therefore vehicle layouts can be optimised.

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“…An increase of electromyography latency of trunk muscles for 68.7 ms on average was measured in the vibration condition compared to non-vibration condition. Another study [37] investigated the influence of different sitting postures during work on reaction time and perceived workload of 21 subjects exposed to [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Hz random WBV in vertical and longitudinal directions. Subjects had to complete a choice reaction time task while seated in different posture conditions and NASA task load index workload assessment after the task.…”

Section: Negative Effects Of Wbv On Reaction Timesmentioning

confidence: 99%

Operator's reaction time prolongation induced by whole-body vibration

Stamenković¹,

Popović²,

Tirovic³

2014

FME Transaction

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Evaluation of reaction time performance and subjective workload during whole-body vibration exposure while seated in upright and twisted postures with and without armrests

Cited by 81 publications

References 20 publications

Assessing Combined Exposures of Whole-body Vibration and Awkward Posture― Further Results from Application of a Simultaneous Field Measurement Methodology

Assessing Combined Exposures of Whole-body Vibration and Awkward Posture― Further Results from Application of a Simultaneous Field Measurement Methodology

Effects of horizontal whole-body vibration and standing posture on activity interference

Operator's reaction time prolongation induced by whole-body vibration

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