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Perceived musculoskeletal discomfort and its association with postural shifts during 4-h prolonged sitting in office workers.
Appl Ergon. 2020 Nov; 89:103225.AE

Abstract

This study examined the characteristics of perceived discomfort and postural shifts at different magnitudes during a 4-h sitting period and the association between perceived discomfort and number of postural shifts. Forty healthy participants continuously typed a standardized text passage at a computer work station for 4 h. Subjects rated perceived body discomfort using Borg's CR-10 scale in 10 body regions (i.e. neck, shoulder, elbow, wrist/hand, upper back, lower back, buttock, thigh, knee, and ankle/foot). A seat pressure mat device was used to gather seat pressure data during sitting. Postural shifts were determined by analysis of the dispersion index of both ischial tuberosities from seat pressure data. The threshold for a postural shift was set at ±10% and ±20%. Perceived discomfort in all body regions increased continuously during a 4-h sitting period. The body regions with the highest perceived discomfort were the low back, buttocks, upper back, thigh, and neck. The average (±SD) numbers of postural shifts during the 1st, 2nd, 3rd, and 4th hour of sitting were 14.8 ± 9.5, 17.8 ± 9.4, 18.2 ± 11.1, and 18.1 ± 9.8 shifts per hour for the 10% threshold, and were 4.8 ± 4.4, 6.0 ± 5.6, 7.4 ± 6.7, and 7.7 ± 6.6 shifts per hour for the 20% threshold, respectively. Prolonged sitting led to an increase in perceived musculoskeletal discomfort over time. The number of postural shifts at both magnitudes increased in the first 2 h of sitting and, in the second 2-h period of sitting, only the number of larger postural shifts (with 20% threshold) increased. The findings extend our understanding of sitting behaviors.

Authors+Show Affiliations

Department of Physical Therapy, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand. Electronic address: golffy_pw@hotmail.com.Department of Public and Occupational Health, Amsterdam Public Health Research Institute, Amsterdam UMC, VU University Amsterdam, Amsterdam, the Netherlands. Electronic address: a.vanderbeek@amsterdamumc.nl.Department of Physical Therapy, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand. Electronic address: nipaporn.pt@gmail.com.Department of Physical Therapy, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, Thailand. Electronic address: prawit.j@chula.ac.th.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32755740

Citation

Waongenngarm, Pooriput, et al. "Perceived Musculoskeletal Discomfort and Its Association With Postural Shifts During 4-h Prolonged Sitting in Office Workers." Applied Ergonomics, vol. 89, 2020, p. 103225.
Waongenngarm P, van der Beek AJ, Akkarakittichoke N, et al. Perceived musculoskeletal discomfort and its association with postural shifts during 4-h prolonged sitting in office workers. Appl Ergon. 2020;89:103225.
Waongenngarm, P., van der Beek, A. J., Akkarakittichoke, N., & Janwantanakul, P. (2020). Perceived musculoskeletal discomfort and its association with postural shifts during 4-h prolonged sitting in office workers. Applied Ergonomics, 89, 103225. https://doi.org/10.1016/j.apergo.2020.103225
Waongenngarm P, et al. Perceived Musculoskeletal Discomfort and Its Association With Postural Shifts During 4-h Prolonged Sitting in Office Workers. Appl Ergon. 2020;89:103225. PubMed PMID: 32755740.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Perceived musculoskeletal discomfort and its association with postural shifts during 4-h prolonged sitting in office workers. AU - Waongenngarm,Pooriput, AU - van der Beek,Allard J, AU - Akkarakittichoke,Nipaporn, AU - Janwantanakul,Prawit, Y1 - 2020/08/02/ PY - 2020/03/22/received PY - 2020/07/09/revised PY - 2020/07/18/accepted PY - 2020/8/7/pubmed PY - 2021/6/8/medline PY - 2020/8/7/entrez KW - Computers KW - Low back pain KW - Musculoskeletal disorders KW - Office workers SP - 103225 EP - 103225 JF - Applied ergonomics JO - Appl Ergon VL - 89 N2 - This study examined the characteristics of perceived discomfort and postural shifts at different magnitudes during a 4-h sitting period and the association between perceived discomfort and number of postural shifts. Forty healthy participants continuously typed a standardized text passage at a computer work station for 4 h. Subjects rated perceived body discomfort using Borg's CR-10 scale in 10 body regions (i.e. neck, shoulder, elbow, wrist/hand, upper back, lower back, buttock, thigh, knee, and ankle/foot). A seat pressure mat device was used to gather seat pressure data during sitting. Postural shifts were determined by analysis of the dispersion index of both ischial tuberosities from seat pressure data. The threshold for a postural shift was set at ±10% and ±20%. Perceived discomfort in all body regions increased continuously during a 4-h sitting period. The body regions with the highest perceived discomfort were the low back, buttocks, upper back, thigh, and neck. The average (±SD) numbers of postural shifts during the 1st, 2nd, 3rd, and 4th hour of sitting were 14.8 ± 9.5, 17.8 ± 9.4, 18.2 ± 11.1, and 18.1 ± 9.8 shifts per hour for the 10% threshold, and were 4.8 ± 4.4, 6.0 ± 5.6, 7.4 ± 6.7, and 7.7 ± 6.6 shifts per hour for the 20% threshold, respectively. Prolonged sitting led to an increase in perceived musculoskeletal discomfort over time. The number of postural shifts at both magnitudes increased in the first 2 h of sitting and, in the second 2-h period of sitting, only the number of larger postural shifts (with 20% threshold) increased. The findings extend our understanding of sitting behaviors. SN - 1872-9126 UR - https://www.unboundmedicine.com/medline/citation/32755740/Perceived_musculoskeletal_discomfort_and_its_association_with_postural_shifts_during_4_h_prolonged_sitting_in_office_workers_ DB - PRIME DP - Unbound Medicine ER -