Comparing dynamic and stationary standing postures in an assembly task

Balasubramanian, Venkatesh; Adalarasu, K.; Regulapati, Rahul

doi:10.1016/j.ergon.2008.10.017

Cited by 92 publications

(64 citation statements)

References 35 publications

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“…Thus, this study investigated the impact of the 5 different combinations of sit/stand time durations on lower extremity muscle activity and perceived level of discomfort while using a sit-stand workstation. This study demonstrated the lower leg muscles (TA, GC) activities at a high rate in the standing posture, which was consistent with the finding of Balasubramanian et al [30] (Figure 4). In addition, the Figure 3 presented a low level of perceived discomfort for C5 and the mean PLD value increased with the longer standing time.…”

Section: Discussionsupporting

confidence: 93%

Quantification of lower extremity physical exposures in various combinations of sit/stand time duration associated with sit-stand workstation

Pei

Babski-Reeves

et al. 2017

Med Pr

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Background: Sit-stand workstations are available for office work purposes but there is a dearth of quantitative evidence to state benefits for lower limb outcomes while using them. And there are no guidelines on what constitutes appropriate sit/stand time duration. The primary aim of this study has been to compare muscle activity and perceived discomfort in the lower extremity during various combinations of sit/stand time duration associated with a sit-stand workstation separately and to evaluate the effects of the sit-stand workstation on the lower extremity during the text entry task. Material and Methods: During the 5 days, all participants completed a 2-h text entry task each day for various sit/stand time duration combinations as follows: 5/25 min, 10/20 min, 15/15 min, 20/10 min, 25/5 min. Lower extremity muscular exposure of 12 male and 13 female participants was collected at 8 sites by surface electromyography and body discomfort was calculated by a questionnaire under those 5 conditions. Results: Results have demonstrated that lower extremity muscle activity has been significantly varied among the 5 sit/stand time duration groups. Perceived level of discomfort (PLD) has not differed significantly for 9 out of 10 body parts. Conclusions: The muscle activity of the thigh region was influenced by sit/stand time duration significantly. Ergonomic exposures of lower extremity when using a sitstand workstation were increased, particularly during the long time standing posture. Results indicate that body mass index (BMI) and gender were not significant factors in this study. Combination of sit/stand time duration 25/5 min appears to show positive effects on relief of muscle exposure of back of thigh in the shifts of sitting and standing work position. Med Pr 2017;68(3):315-327

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Section: Discussionsupporting

confidence: 93%

Quantification of lower extremity physical exposures in various combinations of sit/stand time duration associated with sit-stand workstation

Pei

Babski-Reeves

et al. 2017

Med Pr

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“…In addition, Chester et al, added that in comparison with sitting or sit/stand conditions; prolonged standing was found to cause the highest severity of discomfort, fatigue and overall tiredness [3]. In another study, it was also recorded that prolonged standing during monotonous task may lead to stiffness in active muscles [1].…”

Section: Effect Resulting From Prolonged Standingmentioning

confidence: 99%

“…However in prolonged standing cases (static standing with minimal movement), this working posture results in occupational injuries [2]. The literature [1,3,6,7,8,9,10] showed that prolonged standing leads to physiological discomfort, muscle fatigue, pain and could also contribute to the development of severe health hazards such as Musculoskeletal Disorders (MSDs) with special focus on regions such as the back, leg and foot of the operator. It was documented that if preventive actions are not taken once physiological discomfort is experienced as a result of prolonged standing (for example at the neck and shoulder regions of the upper extremities), the human operators would also have the tendency to later suffer from discomfort and fatigue in the lower extremities as well [8].…”

Section: Effect Resulting From Prolonged Standingmentioning

confidence: 99%

“…Though this particular working posture is being held responsible to the prevalence of psychological and muscles fatigue among human operators [2,3]; the working posture is still being continuously practiced globally [1,2]. This study suggests that this is perhaps due to the cognitive perception of the increase in productivity rate and work effectiveness among the human operators while assuming this working posture.…”

Section: Introductionmentioning

confidence: 83%

“…Prolonged standing as a working posture for human operators is a very common sight in manufacturing plants which utilize the assembly lines concept [1,2]. Though this particular working posture is being held responsible to the prevalence of psychological and muscles fatigue among human operators [2,3]; the working posture is still being continuously practiced globally [1,2].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Review of Studies Concerning Prolonged Standing Working Posture

Noor

Ahmad

Wahab

et al. 2013

AEF

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Abstract. Standing is one of the most preferred working postures in the manufacturing field as it provides a large degree of physical freedom and mobility to the human operators. In addition, the cognitive perceptions of the increase in work effectiveness and productivity rate among the human operators are the reasons this working posture is practiced. However, to stand erect for a long period of time or otherwise known as Prolonged Standing often leads to physiological discomfort, fatigue and even health issues such as Musculoskeletal Disorders (MSDs). The aim of this paper is to review on the effects resulting from Prolonged Standing and disseminates the information on the ergonomic interventions to relieve standing fatigue. Selected journals and research papers related to Prolonged Standing were reviewed and the findings showed that varying the floor conditions such as installing anti-fatigue mat and using shoes with soles would help in relieving discomfort associated with the cumulative effects of Prolonged Standing. Nevertheless, further research is needed to truly quantify the effectiveness of these suggested ergonomics interventions in real world implementations such as in the manufacturing industry.

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