Effects of changes in sitting work posture on static neck and shoulder muscle activity

Schüldt, Kristina; Ekholm, Jan; Harms‐Ringdahl, Karin; Németh, Gunnar; Arborelius, Ulf P.

doi:10.1080/00140138608967266

Cited by 262 publications

(43 citation statements)

References 12 publications

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“…while lifting 50% and 75% weights, flexed neck caused substantially higher muscle activation compared to the neutral and extended neck postures. Consistent with our findings, previously, increased activation of the upper trapezius muscle along the C7 level, at the flexed neck posture was reported in a number of studies evaluating sitting work postures [30][31][32] . Moreover the observed neck-posture and muscle-activation trend is in agreement with the muscle force-length relationship i.e.…”

Section: Discussionsupporting

confidence: 82%

Neck Disorders among Construction Workers: Understanding the Physical Loads on the Cervical Spine during Static Lifting Tasks

et al. 2010

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Section: Discussionsupporting

confidence: 82%

Neck Disorders among Construction Workers: Understanding the Physical Loads on the Cervical Spine during Static Lifting Tasks

et al. 2010

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“…Repetition of head movements particularly in tilting the head while doing office work-typing was found to cause pronounced effects on the strain in the neck and neck ache in a long run (Szeto et al, 2002). In conjunction with the study of Szeto et al (2002), other researches further explained that prolonged FHP tends to increase the loading in the cervical joints and muscles thus causing fatigue in muscles and neck strain (Schuldt et al, 1986).…”

Section: Msd Risk Factors In Relation With Potential Injurious Effectmentioning

confidence: 80%

“…However, researchers found that prolonged FHP might increase the loading in the cervical joints and muscles (Schuldt et al, 1986). Hence, this position, which was observed in the observation and survey, can be a detrimental posture for the students to assume in a long run.…”

Section: Discussionmentioning

confidence: 98%

Development of Ergonomics Guidelines for Improved Sitting Postures in the Classroom among Malaysian University Students

Jee

Lim

2016

American Journal of Applied Sciences

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PLIBEL stands for Plan for Identifiering av Belastnings faktorer, which is a Sweedish acronym describing a method for identification of ergonomics hazards. Using a modified PLIBEL checklist, this study aimed to identify the relationships among musculoskeletal risk factors and the classroom sitting conditions among Malaysian university students. A survey questionnaire was developed based on the modified PLIBEL checklist. A total of 142 responses were retrieved. The data was managed with SPSS version 21 and analysed using reliability analysis, normality analysis and analysis of variance (ANOVA). The results suggested that there was little correlation between the perception of the table and chair arrangements and stress factors by general repetitive movements, repetitive upper extremity movements and space/support of the workplace. Since static sitting postures were typical, students faced risks of developing common musculoskeletal disorders, especially on the lower back and upper back. A list of guidelines was recommended based on the findings to prevent potential musculoskeletal disorder symptoms.

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“…Neck and shoulder muscle activities are high in repetitive and static work postures, especially in the static sitting posture with the whole spine flexed 57) . In the present study, the middle-aged subjects with dorsal neck muscle fatigue showed increased postural sway in the AP direction and sway velocity.…”

Section: Discussionmentioning

confidence: 99%

Postural Stability and Visual Verticality Perception of Neck Disturbance of the Middle-aged during Quiet Standing

et al. 2013

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Abstract. [Purpose] This study investigated postural stability and visual vertical perception of healthy middleaged subjects before and after induction of dorsal neck muscle fatigue.[Subjects] Fourteen subjects (3 males, 11 females) were recruited from the community.[Methods] To induce neck extensor muscle fatigue, participants pushed their heads against a myometer. The average center of pressure (COP) displacement in the medial-lateral (ML) and anterior-posterior (AP) directions and average sway velocity were measured on a force platform, and the error in visual vertical perception was measured using the rod and frame test.[Results] The average COP displacement in the AP direction and average sway velocity were significantly different between before and after induction of neck muscle fatigue. No difference in the average COP displacement in the ML direction or errors in visual verticality perception was observed before and after neck muscle fatigue. [Conclusion] In the presence of visual input, dorsal neck muscle fatigue induced postural instability, but not visual vertical misperception. After isometric or repetitive neck extensor muscle contraction for a long period, taking a rest for a while before changing posture from sitting to standing is recommended for workers, to avoid an increase in postural sway in standing, which may lead to an accidental fall.

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Effects of changes in sitting work posture on static neck and shoulder muscle activity

Cited by 262 publications

References 12 publications

Neck Disorders among Construction Workers: Understanding the Physical Loads on the Cervical Spine during Static Lifting Tasks

Neck Disorders among Construction Workers: Understanding the Physical Loads on the Cervical Spine during Static Lifting Tasks

Development of Ergonomics Guidelines for Improved Sitting Postures in the Classroom among Malaysian University Students

Postural Stability and Visual Verticality Perception of Neck Disturbance of the Middle-aged during Quiet Standing

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