Ergonomic Requirements for Input Devices

Hoehne-Hueckstaedt, Ulrike M.; Chandra, Sandra Keller; Ellegast, Rolf

doi:10.1007/978-3-540-73333-1_27

Cited by 2 publications

(1 citation statement)

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“…A survey of 775 computer workers found that 45% reported upper-extremity symptoms with specific areas of discomfort being the neck (39%), shoulder (22%), hand/wrist (10%), and elbow (4%) (D’Errico et al, 2010). Risk factors for the development of upper-extremity MSDs include awkward or prolonged static postures (Esmaeilzadeh, Ozcan, & Capan, 2014; Husemann, Mach, Borsotto, Isabel, & Scharnbacher, 2009), improper input or viewing equipment alignment (Hoehne-hueckstaedt, Chandra, Ellegast, & Augustin, 2007; Kennedy et al, 2010; Simoneau & Marklin, 2001; Simoneau, Marklin, & Joseph, 2003), and lack of forearm support (Dumas et al, 2008; Wahlström, 2005). Recently, there has been a rapid shift in work organization toward the use of mobile devices and workstations, which could create additional MSD risk factors.…”

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confidence: 99%

Influence of Input Hardware and Work Surface Angle on Upper Limb Posture in a Hybrid Computer Workstation

et al. 2015

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Objective:We evaluated the effect of work surface angle and input hardware on upper-limb posture when using a hybrid computer workstation.Background: Offices use sit-stand and/or tablet workstations to increase worker mobility. These workstations may have negative effects on upper-limb joints by increasing time spent in non-neutral postures, but a hybrid standing workstation may improve working postures.Method: Fourteen participants completed office tasks in four workstation configurations: a horizontal or sloped 15° working surface with computer or tablet hardware. Three-dimensional right upper-limb postures were recorded during three tasks: reading, form filling, and writing e-mails. Amplitude probability distribution functions determined the median and range of upper-limb postures.Results: The sloped-surface tablet workstation decreased wrist ulnar deviation by 5° when compared to the horizontal-surface computer when reading. When using computer input devices (keyboard and mouse), the shoulder, elbow, and wrist were closest to neutral joint postures when working on a horizontal work surface. The elbow was 23° and 15° more extended, whereas the wrist was 6° less ulnar deviated, when reading compared to typing forms or e-mails.Conclusion: We recommend that the horizontalsurface computer configuration be used for typing and the sloped-surface tablet configuration be used for intermittent reading tasks in this hybrid workstation.Application: Offices with mobile employees could use this workstation for alternating their upperextremity postures; however, other aspects of the device need further investigation.

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