Full-Shift Trunk and Upper Arm Postures and Movements Among Aircraft Baggage Handlers.

OBJECTIVES The present study assessed full-shift trunk and upper arm postural exposure amplitudes, frequencies, and durations among Swedish airport baggage handlers and aimed to determine whether exposures differ between workers at the ramp (loading and unloading aircraft) and baggage sorting areas. METHODS Trunk and upper arm postures were measured using inclinometers during three full work shifts on each of 27 male baggage handlers working at a large Swedish airport. Sixteen of the baggage handlers worked on the ramp and 11 in the sorting area. Variables summarizing postures and movements were calculated, and mean values and variance components between subjects and within subject (between days) were estimated using restricted maximum likelihood algorithms in a one-way random effect model. RESULTS In total, data from 79 full shifts (651h) were collected with a mean recording time of 495min per shift (range 319-632). On average, baggage handlers worked with the right and left arm elevated >60° for 6.4% and 6.3% of the total workday, respectively. The 90th percentile trunk forward projection (FP) was 34.1°, and the 50th percentile trunk movement velocity was 8° s(-1). For most trunk (FP) and upper arm exposure variables, between-subject variability was considerable, suggesting that the flight baggage handlers were not a homogeneously exposed group. A notable between-days variability pointed to the contents of the job differing on different days. Peak exposures (>90°) were higher for ramp workers than for sorting area workers (trunk 0.6% ramp versus 0.3% sorting; right arm 1.3% ramp versus 0.7% sorting). CONCLUSIONS Trunk and upper arm postures and movements among flight baggage handlers measured by inclinometry were similar to those found in other jobs comprising manual material handling, known to be associated with increased risks for musculoskeletal disorders. The results showed that full-shift trunk (FP) and, to some extent, peak arm exposures were higher for ramp workers compared with sorting workers.

[1]  Alex Burdorf,et al.  Associations between work-related factors and specific disorders of the shoulder--a systematic review of the literature. , 2010, Scandinavian journal of work, environment & health.

[2]  S. Milosavljevic,et al.  Dose-response relationship between work-related cumulative postural exposure and low back pain: a systematic review. , 2012, The Annals of occupational hygiene.

[3]  Shrawan Kumar,et al.  Working Postures: A Literature Review , 2004, Journal of Occupational Rehabilitation.

[4]  L. Straker,et al.  Posture variation among office workers when using different information and communication technologies at work and away from work , 2014, Ergonomics.

[5]  I. Balogh,et al.  Relation between perceived and measured workload obtained by long-term inclinometry among dentists. , 2009, Applied ergonomics.

[6]  Svend Erik Mathiassen,et al.  Changes in physical workload with implementation of mouse-based information technology in air traffic control , 2006 .

[7]  Charlotte Brauer,et al.  Baggage handler seniority and musculoskeletal symptoms: is heavy lifting in awkward positions associated with the risk of pain? , 2013, BMJ Open.

[8]  Alwin Luttmann,et al.  Cumulative occupational lumbar load and lumbar disc disease – results of a German multi-center case-control study (EPILIFT) , 2009, BMC musculoskeletal disorders.

[9]  Sahika Vatan Korkmaz,et al.  Spinal loading during manual materials handling in a kneeling posture. , 2007, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[10]  Svend Erik Mathiassen,et al.  Electromyographic activity in the shoulder-neck region according to arm position and glenohumeral torque , 2004, European Journal of Applied Physiology and Occupational Physiology.

[11]  Tim Bosch,et al.  The influence of task variation on manifestation of fatigue is ambiguous – a literature review , 2014, Ergonomics.

[12]  Tomas Engström,et al.  Increasing the degree of automation in a production system: Consequences for the physical workload , 2006 .

[13]  C. Wiktorin,et al.  A triaxial accelerometer for measuring arm movements. , 2002, Applied ergonomics.

[14]  M. Frings-Dresen,et al.  The effect of lifting during work on low back pain: a health impact assessment based on a meta-analysis , 2014, Occupational and Environmental Medicine.

[15]  G. Hansson,et al.  Validity and reliability of triaxial accelerometers for inclinometry in posture analysis , 2001, Medical and Biological Engineering and Computing.

[16]  Svend Erik Mathiassen,et al.  Data collection costs in industrial environments for three occupational posture exposure assessment methods , 2012, BMC Medical Research Methodology.

[17]  Svend Erik Mathiassen,et al.  Upper arm postures and movements in female hairdressers across four full working days. , 2010, The Annals of occupational hygiene.

[18]  Lars Medbo,et al.  A case study of a principally new way of materials kitting an evaluation of time consumption and physical workload , 2002 .

[19]  Svend Erik Mathiassen,et al.  Cost-efficient assessment of biomechanical exposure in occupational groups, exemplified by posture observation and inclinometry. , 2014, Scandinavian journal of work, environment & health.

[20]  Karen Søgaard,et al.  Work related neck-shoulder pain: a review on magnitude, risk factors, biochemical characteristics, clinical picture and preventive interventions. , 2007, Best practice & research. Clinical rheumatology.

[21]  N. Fallentin,et al.  Assessment of work postures and movements using a video-based observation method and direct technical measurements. , 2001, Applied ergonomics.

[22]  Kerstina Ohlsson,et al.  Gender differences in workers with identical repetitive industrial tasks: exposure and musculoskeletal disorders , 2008, International archives of occupational and environmental health.

[23]  John Rosecrance,et al.  Full shift arm inclinometry among dairy parlor workers: a feasibility study in a challenging work environment. , 2012, Applied ergonomics.

[24]  G K Lemasters,et al.  Statistical methods for describing occupational exposure measurements. , 1985, American Industrial Hygiene Association journal.

[25]  J P Bonde,et al.  Work related shoulder disorders: quantitative exposure-response relations with reference to arm posture , 2004, Occupational and Environmental Medicine.

[26]  Peter W. Johnson,et al.  EMG estimated mean, peak, and cumulative spinal compression of workers in five heavy industries , 2010 .

[27]  S Skerfving,et al.  Musculoskeletal disorders among female and male air traffic controllers performing identical and demanding computer work , 2006, Ergonomics.

[28]  Svend Erik Mathiassen,et al.  An integrated analysis of ergonomics and time consumption in Swedish 'craft-type' car disassembly. , 2005, Applied ergonomics.

[29]  G-A Hansson,et al.  Modular data logger system for physical workload measurements , 2003, Ergonomics.

[30]  Kerstina Ohlsson,et al.  Rationalization in meat cutting - consequences on physical workload. , 2012, Applied ergonomics.

[31]  Carolyn M. Sommerich,et al.  Baggage handling in an airplane cargo hold: An ergonomic intervention study , 2006 .

[32]  Svend Erik Mathiassen,et al.  Diversity and variation in biomechanical exposure: what is it, and why would we like to know? , 2006, Applied ergonomics.

[33]  Divya Srinivasan,et al.  The ability of non-computer tasks to increase biomechanical exposure variability in computer-intensive office work , 2015, Ergonomics.

[34]  Svend Erik Mathiassen,et al.  Bias and imprecision in posture percentile variables estimated from short exposure samples , 2012, BMC Medical Research Methodology.

[35]  Tore J Larsson,et al.  Frequent bending--an underestimated burden in nursing professions. , 2012, The Annals of occupational hygiene.

[36]  Kaj Bo Veiersted,et al.  Effect of an intervention addressing working technique on the biomechanical load of the neck and shoulders among hairdressers. , 2008, Applied ergonomics.

[37]  S E Mathiassen,et al.  Precision of measurements of physical workload during standardised manual handling. Part II: Inclinometry of head, upper back, neck and upper arms. , 2006, Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology.

[38]  Svend Erik Mathiassen,et al.  Variability in mechanical exposure within and between individuals performing a highly constrained industrial work task , 2003, Ergonomics.

[39]  Svend Erik Mathiassen,et al.  Data processing costs for three posture assessment methods , 2013, BMC Medical Research Methodology.

[40]  Kerstina Ohlsson,et al.  Differences in physical workload, psychosocial factors and musculoskeletal disorders between two groups of female hospital cleaners with two diverse organizational models , 2007, International archives of occupational and environmental health.

[41]  S. E. Mathiassen,et al.  Psychosocial Work Factors and Musculoskeletal Pain: A Cross-Sectional Study among Swedish Flight Baggage Handlers , 2015, BioMed research international.

[42]  Monique H W Frings-Dresen,et al.  Effects of job rotation on musculoskeletal complaints and related work exposures: a systematic literature review , 2015, Ergonomics.

[43]  W. E. Hoogendoorn,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 , 2000, Spine.

[44]  T P Leskinen,et al.  Postural, epidemiological and biomechanical analysis of luggage handling in an aircraft luggage compartment. , 1986, Applied ergonomics.

[45]  Svend Erik Mathiassen,et al.  Is what you see what you get? Standard inclinometry of set upper arm elevation angles. , 2015, Applied ergonomics.

[46]  J Winkel,et al.  Ergonomic effects of a management-based rationalization in assembly work - a case study. , 1996, Applied ergonomics.