Interactive Model of Subsidiary Behaviors, Work Performance and Autonomic Nerve Activity during Visual Display Terminal Work

Takanishi, Toshimasa; Ebara, Takeshi; Murasaki, Gen-i; Kubo, Tomohide; Tachi, Norihide; Itani, Toru; Kamijima, Michihiro

doi:10.1539/joh.l9110

Cited by 14 publications

(11 citation statements)

References 21 publications

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“…Rogé et al [35], for instance, found that subsidiary body movements increase when vigilance decreases during simulated driving. Takanashi et al [36] also found that small, repeating movements are related to objective measures of fatigue.…”

Section: Experiential Feelingsmentioning

confidence: 97%

Investigating Car Passenger Well-Being Related to a Seat Imposing Continuous Posture Variation

Veen¹,

Orlinskiy²,

Franz³

et al. 2015

J Ergonomics

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Static sitting when travelling by car is known to cause physical fatigue. It is generally encouraged to periodically engage in non-sedentary activities, but this is not possible when traveling by car. The present study aims to investigate the influence of moving the vehicle occupant's body passively. This posture variation is realized by continuously varying the seat configuration, i.e., the seat pan and backrest inclination. For the experiment, 21 participants sat twice on the same seat for 45 minutes: Once in a static and once in a dynamic configuration. The measurements obtained were the observation of body movements and questionnaires on perceived discomfort, seating comfort and experiential feelings. The results show that participants move significantly more in the static configuration and that they perceive more discomfort. The seat's comfort and support are evaluated significantly better in the dynamic configuration. The dynamic configuration results in participants feeling significantly more active, energetic, stimulated, pleasantly surprised, pleased, comfortable, accepting and calm. The static configuration results in the participants feeling marginally more tired and significantly more bored. Further research should investigate the effects in the context of driving on the road and an actual driving task. However, it can be concluded that the continuous movements of the seat have a beneficial effect on objective and subjective indicators of well-being.

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Section: Experiential Feelingsmentioning

confidence: 97%

Investigating Car Passenger Well-Being Related to a Seat Imposing Continuous Posture Variation

Veen¹,

Orlinskiy²,

Franz³

et al. 2015

J Ergonomics

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“…This finding shows that people change their posture while they are seated for work to reduce discomfort, suggesting that discomfort could be reduced by making postural changes easier with more mobile seats. During work performed while sitting, people use physical movements to disperse stress when they feel fatigued, sleepy, or otherwise uncomfortable 44 ) . Chairs with freely movable seats, rather than limiting these movements, are thought to facilitate these movements.…”

Section: Discussionmentioning

confidence: 99%

Effects of a dynamic chair on pelvic mobility, fatigue, and work efficiency during work performed while sitting: a comparison of dynamic sitting and static sitting

et al. 2016

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[Purpose] Working while sitting for long periods can cause lumbar pain, fatigue, and reduced work efficiency. How a dynamic chair with a seat that moves three-dimensionally affects pelvic mobility before and after work, work efficiency, and post-work fatigue were examined. [Subjects and Methods] Subjects were 17 healthy adults (10 males, 7 females, mean age 21.8 ± 2.7 years). Subjects performed a 30-min Kraepelin test under two conditions: sitting in a standard office chair and sitting in a dynamic sitting balance chair. Root mean square (RMS) values of pelvic movement measured by a triaxial accelerometer during 30 minutes of work, finger-floor distance before and after work, lumbar fatigue, and pelvic movement RMS values during finger-floor distance measurement were used as outcome measures. [Results] Pelvic movement RMS values collected every 5 minutes during 30 minutes of work were significantly higher while sitting in the dynamic balance chair. Changes in pelvic movement RMS values during finger-floor distance measurement after work and amount of work performed during 30 minutes were significantly higher and lumbar fatigue was significantly lower for the dynamic balance chair. [Conclusion] Dynamic sitting maintained or increased pelvic flexibility. The dynamic balance chair may effectively help workers work continuously in seated postures with little fatigue.

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“…These findings indicate that the volatile compounds from V. zizanioides roots may maintain performance and sympathetic nerve system activity during a visual discrimination task. The high workloads in workspace were associated with mental health disturbance (7,29). A low concentration of the volatile compounds from the roots of V. zizanioides could be used to reduce the negative effects of workloads during performing a visual discrimination work.…”

Section: Discussionmentioning

confidence: 99%

Volatiles emitted from the roots of Vetiveria zizanioides suppress the decline in attention during a visual display terminal task

et al. 2012

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The perennial grass Vetiveria zizanioides (vetiver) is mainly cultivated for its fragrant essential oil. Although the components of the oil and their biological activities have been studied extensively, the effect of the volatiles emitted from the roots of V. zizanioides on humans has so far remained unexplored. We investigated the effects of volatile compounds emitted from the cut roots of V. zizanioides (1.0 g, low-dose conditions; 30 g, high-dose conditions) on individuals during a visual display terminal task. Participants who breathed the volatile compounds emitted under low-dose conditions showed faster reaction times and stimulation of sympathetic nerve activity as measured by electrocardiography. These effects were not observed under high-dose conditions. The total amount of volatiles emitted during the experiment was 0.25 μg under low-dose conditions and 1.35 μg under high-dose conditions. These findings indicate that volatile compounds emitted from the roots of V. zizanioides under low-dose conditions may have helped subjects to maintain performance in visual discrimination tasks while maintaining high sympathetic nerve system activity.The perennial grass Vetiveria zizanioides is widely cultivated, especially in Southeast Asia. The roots of V. zizanioides (Fig. 1) contain many volatile compounds; the essential oil, collected by steam distillation of the roots, is a viscous liquid that varies in color from amber to dark brown (4, 26), and in general, its odor is described as earthy and woody (2). Because of its excellent fixative properties, V. zizanioides is one of the most important raw materials in perfumery (16,23). The authors of most of the previous studies of V. zizanioides have aimed to identify the compounds of the essential oil prepared from the roots of V. zizanioides and elucidate the activities of this essential oil (3,5,8,11,15,18,35). The qualities of the essential oil prepared from the roots of V. zizanioides depend on genetic, environmental and technological factors (17,25). Although the roots of V. zizanioides have been used as described above since ancient times, and impressions of the volatiles of the roots were different from those of the essential oil, the effects of the volatiles directly emitted from the roots of V. zizanioides have not been explored. We previously established an experimental method to evaluate the effects of aromatic herbs in relation to the performance of a visual discrimination task (19)(20)(21)(22). Aromatic herbs act through olfactory pathways in the brain, including the cerebral cortex, hypothalamus and amygdala, which are different from the visual transduction and processing path-

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Interactive Model of Subsidiary Behaviors, Work Performance and Autonomic Nerve Activity during Visual Display Terminal Work

Cited by 14 publications

References 21 publications

Investigating Car Passenger Well-Being Related to a Seat Imposing Continuous Posture Variation

Investigating Car Passenger Well-Being Related to a Seat Imposing Continuous Posture Variation

Effects of a dynamic chair on pelvic mobility, fatigue, and work efficiency during work performed while sitting: a comparison of dynamic sitting and static sitting

Volatiles emitted from the roots of Vetiveria zizanioides suppress the decline in attention during a visual display terminal task

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