2017-08-01 12:00 - Messages

The Relationship Between Occupational Standing and Sitting and Incident Heart Disease Over a 12-Year Period in Ontario, Canada

While a growing body of research is examining the impacts of prolonged occupational sitting on cardiovascular and other health risk factors, relatively little work examined the effects of occupational standing. The objectives of this paper were to examine the relationship between occupations that require predominantly sitting, and those that require predominantly standing, and incident heart disease. A prospective cohort study combining responses to a population health survey with administrative health care records, linked at the individual level was conducted in Ontario, Canada. The sample included 7320 employed labour market participants (50% male) working 15 hours a week or more and free of heart disease at baseline. Incident heart disease was assessed using administrative records over an approximately 12-year follow-up period (2003-2015). Models were adjusted for a wide range of potential confounding factors. Occupations involving predominantly standing were associated with an approximately two-fold risk of heart disease compared to occupations involving predominantly sitting. This association was robust to adjustment for other health, socio-demographic and work variables. Cardiovascular risk associated with occupations that involve combinations of sitting, standing and walking differed for men and women, with these occupations associated with lower cardiovascular risk estimates among men, but elevated risk estimates among women.

Source: Smith, P., Ma, H., Glazier, R. H., Gilbert-Ouimet, M., & Mustard, C. (2017). American Journal of Epidemiology.

NIOSH Lifting Equation App: NLE Calc

The National Institute for Occupational Safety and Health (NIOSH) Lifting Equation mobile application, NLE Calc, is a tool to calculate the overall risk index for single and multiple manual lifting tasks. This application provides risk estimates to help evaluate lifting tasks and reduce the incidence of low back injuries in workers.

Source: https://www.cdc.gov/niosh/topics/ergonomics/nlecalc.html

Conception des équipements de travail et prévention des TMS Complémentarités et points d’ancrage des démarches

Après un bref rappel sur les démarches de prévention des TMS et de conception des équipements de travail, cet article présente dans un premier temps les difficultés constatées vis-à-vis de leur articulation. Il propose ensuite des « points d'ancrage » pour accompagner, dans un cadre participatif et multidisciplinaire, les temps de recherche de solutions et de décisions. Les interactions ainsi obtenues favorisent le partage des référentiels et explicitent les processus de décision. Elles fonctionnent à l'identique d'un « moteur méthodologique » qui implante la problématique des TMS à chaque séquence de la conception.
Cette approche doit permettre aux petites et moyennes entreprises (PME) de trouver des réponses à leurs besoins en matière de prévention des TMS très en amont dans le processus de conception d'un équipement de travail. Elle contribue en effet à une meilleure compréhension des leviers favorisant la prise en compte des TMS et à l'élaboration de nouvelles références d'actions vis-à-vis du processus de conception.

Source: Marsot, J. et Atain-Kouadio, J-J. (2017). Pistes, 19(2).

Cumulative occupational mechanical exposures during working life and risk of sickness absence and disability pension

Prospective cohort study
Using a biomechanical job exposure matrix combined with Danish registers, cumulative occupational mechanical exposures throughout life (ie, more years with heavy and frequent lifting, and kneeling work) predicted risk of long-term sickness absence among older workers. Importantly, heavy lifting throughout working life was associated with disability pension.

Source: Sundstrup E, Hansen ÅM, Mortensen EL, Poulsen OM, Clausen T, Rugulies R, Møller A, Andersen LL. (2017). Scand J Work Environ Health.

Decrease in musculoskeletal pain after 4 and 12 months of an aerobic exercise intervention

A worksite RCT among cleaners
Background: Prevalence of musculoskeletal pain is high in jobs with high physical work demands. An aerobic exercise intervention targeting cardiovascular health was evaluated for its long term side effects on musculoskeletal pain. Objective: The objective was to investigate if aerobic exercise affects level of musculoskeletal pain from baseline to 4- and 12-months follow-up. Methods: One-hundred-and-sixteen cleaners aged 18–65 years were cluster-randomized. The aerobic exercise group (n = 57) received worksite aerobic exercise (30 min twice a week) and the reference group (n = 59) lectures in health promotion. Strata were formed according to closest manager (total 11 strata); clusters were set within strata (total 40 clusters, 20 in each group). Musculoskeletal pain data from eight body regions was collected at baseline and after 4- and 12-months follow-up. The participants stated highest pain in the last month on a scale from 0, stating no pain, up to 10, stating worst possible pain. A repeated-measure 2 × 2 multi-adjusted mixed-models design was applied to compare the between-groups differences in an intention to treat analysis. Participants were entered as a random effect nested in clusters to account for the cluster-based randomization. Results: Clinically significant reductions (>30%, f 2 > 0.25) in the aerobic exercise group, compared to the reference group, in pain intensity in neck, shoulders, arms/wrists were found at 12-months follow-up, and a tendency (p = 0.07, f 2 = 0.18) to an increase for the knees. At 4-months follow-up the only significant between-group change was an increase in hip pain. Conclusions: This study indicates that aerobic exercise reduces musculoskeletal pain in the upper extremities, but as an unintended side effect may increase pain in the lower extremities. Aerobic exercise interventions among workers standing or walking in the majority of the working hours should tailor exercise to only maintain the positive effect on musculoskeletal pain.

Source: Korshøj, M., Birk Jørgensen, M., Lidegaard, M., Mortensen, O. S., Krustrup, P., Holtermann, A., & Søgaard, K. (2017). Scandinavian Journal of Public Health.

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