Food service kitchen workers often spend long working days in standing positions and report a high prevalence of musculoskeletal disorders and pain. The height of their workstations is rarely adjustable, and this lack of adjustability could impact the development of such disorders and pain.
Objective
To assess the impact of adjustable worktable height during a simulated precision-level, kitchen-related task with healthy university students, using biomechanical, discomfort, and workload measures.
Methods
Twenty healthy participants performed a one-hour standing, precision-level, simulated “cake-decorating” task at a standard height table and at an adjustable height table, on two days separated by a minimum of one week. Subjective discomfort was assessed using a Visual Analog Scale (VAS), and perceived workload was assessed using the NASA Task Load Index (NASA-TLX). Electromyography (EMG) of the neck and back muscles, and kinematic data were collected. Data were analyzed using repeated-measures ANOVAs with Tukey's HSD post-hoc tests (α = 0.05).
Results
All participants raised the table to a higher height after the first 10 minutes on the adjustable day. Discomfort scores, and mental, physical, and temporal task load scores were significantly lower on the adjustable day compared to the non-adjustable day. Neck and thoracic spine flexion, as well as muscle activations, were significantly lower on the adjustable day compared to the non-adjustable day.
Conclusions
The ability to adjust table height improved objective measures of posture and muscle activity, as well as subjective ratings of physical discomfort, mental workload, and temporal demands during a simulated precision-level, kitchen-related task.
ShankarSShanmugamMSrinivasanJ. Workplace factors and prevalence of low back pain among male commercial kitchen workers. J Back Musculoskelet Rehabil2015; 28: 481–488.
2.
XuYWChengASKLi-TsangCWP. Prevalence and risk factors of work-related musculoskeletal disorders in the catering industry: a systematic review. Work2013; 44: 107–116.
3.
XuYWChengASK. An onsite ergonomics assessment for risk of work-related musculoskeletal disorders among cooks in a Chinese restaurant. Work2014; 48: 539–545.
4.
ChenYLZhongYTLiouBN, et al.Musculoskeletal disorders symptoms among Taiwanese bakery workers. Int J Environ Res Public Health2020; 17: E2960.
5.
DasBSenguptaAK. Evaluation of low back pain risks in a beef skinning operation. Int J Occup Saf Ergon JOSE2000; 6: 347–361.
6.
U.S. Bureau of Labor Statistics [Internet]. [cited 2022 Jun 22]. Available from: https://www.bls.gov/
7.
WatersTRDickRB. Evidence of health risks associated with prolonged standing at work and intervention effectiveness. Rehabil Nurs Off J Assoc Rehabil Nurses2015; 40: 148–165.
8.
ChangJHWuJDChenCY, et al.Risks of musculoskeletal disorders among betel quid preparers in Taiwan. Am J Ind Med2014; 57: 476–485.
9.
ChyuanJYADuCLYehWY, et al.Musculoskeletal disorders in hotel restaurant workers. Occup Med Oxf Engl2004; 54: 55–57.
10.
HaukkaELeino-ArjasPSolovievaS, et al.Co-occurrence of musculoskeletal pain among female kitchen workers. Int Arch Occup Environ Health2006; 80: 141–148.
11.
JahangiriMEskandariFKarimiN, et al.Self-Reported, work-related injuries and illnesses among restaurant workers in shiraz city, south of Iran. Ann Glob Health2019; 85: 68.
12.
ParkSLeeJLeeJH. Insufficient rest breaks at workplace and musculoskeletal disorders among Korean kitchen workers. Saf Health Work2021; 12: 225–229.
13.
TegenuHGebrehiwotMAzanawJ, et al.Self-Reported work-related musculoskeletal disorders and associated factors among restaurant workers in Gondar City, Northwest Ethiopia, 2020. J Environ Public Health2021; 2021: 6082506.
14.
DaintyRSAlcornEFergusonCA, et al.Prevalence of occupation-related pain among baristas and an examination of low back and shoulder demand during the preparation of espresso-based beverages. Ergonomics2014; 57: 1192–1200.
15.
YatesKABBrownSHM. Prevalence of musculoskeletal discomfort, occupational working factors, and work demands amongst food service kitchen workers in Ontario Canada. Disc Pub Health2025; 22: 151.
16.
HabibRREl-HaddadNWElzeinK, et al.Mental and self-rated health of bakery workers in Lebanon: a national study. SAGE Open Med2020; 8: 2050312120962345.
17.
NagasuMSakaiKItoA, et al.Prevalence and risk factors for low back pain among professional cooks working in school lunch services. BMC Public Health2007; 7: 171.
18.
JoudakiniaLAfshariDSakiA, et al.Evaluation of biomechanical risk factors for neck and back disorders in traditional bakers during a work-day: implications for ergonomics intervention. Arch Environ Occup Health2021; 76: 86–93.
19.
PengCYHsiehHMLiMY, et al.Gender differences and site-specific incident risks of musculoskeletal disorders among 224 506 workers in the food and beverage service industry in Taiwan: a 15-year nationwide population-based cohort study. J Occup Health2021; 63: e12214.
20.
ShiueHSLuCWChenCJ, et al.Musculoskeletal disorder among 52,261 Chinese restaurant cooks cohort: result from the national health insurance data. J Occup Health2008; 50: 163–168.
21.
PekkarinenAAnttonenH. The effect of working height on the loading of the muscular and skeletal systems in the kitchens of workplace canteens. Appl Ergon1988; 19: 306–308.
22.
MagnussonMOrtengrenR. Investigation of optimal table height and surface angle in meatcutting. Appl Ergon1987; 18: 146–152.
23.
IwakiriKSotoyamaMMoriI, et al.Does leaning posture on the kitchen counter alleviate workload on the low back and legs during dishwashing?Ind Health2007; 45: 535–545.
24.
IwakiriKKunisueRSotoyamaM, et al.Postural support by a standing aid alleviating subjective discomfort among cooks in a forward-bent posture during food preparation. J Occup Health2008; 50: 57–62.
SchultzABAnderssonGBJOrtengrenR, et al.Analysis and quantitative myoelectric measurements of loads on the lumbar spine when holding weights in standing postures. Spine1982; 7: 390–397.
27.
ShinGD’SouzaCLiuYH. Creep and fatigue development in the low back in static flexion. Spine2009; 34: 1873–1878.
28.
AnderssonGBOrtengrenRHerbertsP. Quantitative electromyographic studies of back muscle activity related to posture and loading. Orthop Clin North Am1977; 8: 85–96.
29.
OsmotherlyPAttiaJ. The interplay of static and dynamic postural factors in neck pain. Hong Kong Physiother J2008; 26: 9–17.
30.
HoogendoornWEBongersPMde VetHCW, et al.Flexion and rotation of the trunk and lifting at work are risk factors for low back pain: results of a prospective cohort study. Spine2000; 25: 3087–3092.
BreretonLCMcGillSM. Frequency response of spine extensors during rapid isometric contractions: effects of muscle length and tension. J Electomyogr Kinesiol1998; 8: 227–232.
33.
BrownSHMMcGillSM. Co-activation alters the linear versus non-linear impression of the EMG-torque relationship of trunk muscles. J Biomech2008; 41: 491–497.
34.
AriënsGAvan MechelenWBongersPM, et al.Physical risk factors for neck pain. Scand J Work Environ Health2000; 26: 7–19.
35.
PunnettLFineLJKeyserlingWM, et al.Back disorders and nonneutral trunk postures of automobile assembly workers. Scand J Work Environ Health1991; 17: 337–346.
36.
ØstensvikTVeierstedKBNilsenP. A method to quantify frequency and duration of sustained low-level muscle activity as a risk factor for musculoskeletal discomfort. J Electromyogr Kinesiol Off J Int Soc Electrophysiol Kinesiol2009; 19: 283–294.
37.
HabibiETaheriMRHasanzadehA. Relationship between mental workload and musculoskeletal disorders among Alzahra Hospital nurses. Iran J Nurs Midwifery Res2015; 20: 1–6.
38.
MarrasWSDavisKGHeaneyCA, et al.The influence of psychosocial stress, gender, and personality on mechanical loading of the lumbar spine. Spine2000; 25: 3045–3054.
39.
SundstrupESeebergKGVBengtsenE, et al.A systematic review of workplace interventions to rehabilitate musculoskeletal disorders among employees with physical demanding work. J Occup Rehabil2020; 30: 588–612.
