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 96 publications

(67 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%

“…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%

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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“…Surface electromyography (sEMG) is the most popular approach for measuring muscle activation and fatigue. Feasible and reliable means of assessing muscle fatigue in ergonomic studies include the analysis of sEMG recordings and development of a pattern for the muscle action potential [12] changes in the sEMG activ- …”

Section: Introductionmentioning

confidence: 99%

Assessment of shoulder and low back muscle activity of male kitchen workers using surface electromyography

Subramaniam¹,

Murugesan

Jayaraman

2017

Int J Occup Med Environ Health

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Objectives: This study aims to assess muscle fatigue for kitchen workers during various tasks in a kitchen. Material and Methods: This study consists of 2 phases: a) surface electromyography (EMG) to determine muscle fatigue of trapezius and erector spinae muscles bilaterally for 12 healthy male volunteers during 30 min of Indian flatbread (chapati) preparation, b) self-administered questionnaire study after 30 min preparation to determine the impact on performance. Results: Surface EMG results show that the right trapezius muscle had significantly higher fatigue during kneading, rolling and roasting tasks. Similarly, right erector spinae muscle showed significantly higher fatigue during rolling and roasting tasks. Conclusions: Both phases of the study conclude that, even though the dynamic postural adjustment may reduce fatigue during the work schedule; the combination of risk factors like the repetitive task, forceful exertion and prolonged standing during working results in a high risk of developing muscle fatigue. Int J Occup Med Environ Health 2018;31(1):81 -90

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Comparing dynamic and stationary standing postures in an assembly task

Cited by 96 publications

References 35 publications

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

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

A Review of Studies Concerning Prolonged Standing Working Posture

Assessment of shoulder and low back muscle activity of male kitchen workers using surface electromyography

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