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EmploymEnt, Work, And hEAlth InEquAlItIEs - a global perspective<br />

traffic controller at the harbour's control<br />

tower. port of Genoa (Italy).<br />

source: © ilo/M. crozet (2008)<br />

Macfarlane, & nicholas, 2007). Good examples of physical<br />

consequences of psychosocial working conditions are provided by<br />

musculoskeletal complaints and cardiovascular outcomes. The<br />

psychosocial work environment is assumed to influence<br />

musculoskeletal complaints through a number of pathways.<br />

People working in adverse psychosocial circumstances are<br />

reported to have a higher secretion of catecholamine, faster heart<br />

rhythm, higher blood pressure and greater muscular tension<br />

(frankenhaeuser & Gardell, 1976). stress-related muscular<br />

tension increases the static load of the muscles, which may result<br />

in more fatigued muscles and the discomfort associated with it<br />

(Westgaard & Bjorklund, 1987). in addition, stressed individuals<br />

may change their behaviour and as a result, increase muscular<br />

tension (lim, sauter, & swanson, 1998). for example, stress may<br />

result in the application of more force than necessary in<br />

performing tasks. furthermore, psychosocial factors can also<br />

increase the ergonomic demands of a task, for example, by having<br />

to work harder or faster (lim et al., 1998). finally, perceptual<br />

mechanisms may also interact with the effects of physical<br />

movements or postures (sauter & swanson, 1996). for example,<br />

symptoms related to a specific working position may emerge<br />

more quickly in dull or routine jobs.<br />

another interesting case is provided by cardiovascular disease<br />

(cVd) and its related risk factors (Belkic, landsbergis, schnall, &<br />

Baker, 2004). high blood pressure appears to constitute one of the<br />

main pathways between adverse psychosocial working conditions<br />

and cVd (Belkic et al., 2004; Brisson, larocque, Moisan, Vezina, &<br />

dagenais, 2000; Greiner, Krause, ragland, & fisher, 2004; schnall,<br />

schwartz, landsbergis, Warren, & Pickering, 1998; Vrijkotte, Van<br />

doornen, & de Geus, 2000). eri has also been associated with other<br />

risk factors, such as ldl/hdl cholesterol (Peter et al., 1998;<br />

siegrist, 1990), body mass index (BMi) (Kivimäki et al., 2002) and<br />

new cases of Type 2 diabetes (Kouvonen et al., 2006). links between<br />

eri and behavioural risk factors, such as being overweight,<br />

smoking, heavy alcohol use, and physical inactivity have also been<br />

demonstrated (Kouvonen et al., 2006; siegrist & rodel, 2006). The<br />

BMi is related to the metabolic syndrome, a cluster of physiological<br />

factors increasing the risk of heart disease and diabetes, which is<br />

linked via a dose-response relationship with situations of job stress<br />

(chandola, Brunner, & Marmot, 2006).<br />

on the other hand, it has also been shown that material<br />

working conditions are related to psychological outcomes (de<br />

croon, Blonk, de Zwart, frings-dresen, & Broersen, 2002;<br />

268

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