https://commons.ru.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://commons.ru.ac.za/vital/access/manager/Repository/vital:5105 Wed 12 May 2021 23:09:10 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5162 Wed 12 May 2021 23:08:18 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5109 Wed 12 May 2021 20:48:53 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:25412 Wed 12 May 2021 19:59:10 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5118 Wed 12 May 2021 19:45:01 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5137 Wed 12 May 2021 19:07:49 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5107 combined) for most of the conditions assessed for the biomechanical and physiological responses. In the majority of cases for muscle activity, no significant differences were found between the combined and the additive effects (p < 0.05), while for the physiological responses there were mostly significant differences observed. Psychophysical responses indicated that there was a significant difference overall between the additive and combined effects. The results of this study demonstrate that in order to identify risk areas, manipulation tasks and constrained working postures may be considered either in isolation and added together (additive) or as a combined task, since there were very few significant differences observed between these two effects. Further studies are required, however, to provide conclusive evidence.]]> Wed 12 May 2021 18:40:28 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5115 Wed 12 May 2021 17:04:20 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:41360 Wed 12 May 2021 14:22:05 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5145 Thu 13 May 2021 08:04:09 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5144 Thu 13 May 2021 06:54:06 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5112 1800mm). The musculoskeletal responses indicated that Tall subjects were forced to adopt the most awkward general body postures as a result of the low computer screen. However, the low screen allowed for the Short subjects to adopt the most natural general body postures, although levels of muscular activity in the upper trapezius suggest that the muscular load imposed on both Short and Tall subjects was significantly greater than that imposed on the Medium subjects. In addition, the Medium subjects’ perceptions of the Standard workstation dimensions support the fact that this workstation was better suited to users with “average” morphologies. The responses elicited in the Personalised and Wrist Support workstations were improved significantly when compared to the Standard workstation. Joint angles were more natural, upper trapezius EMG was reduced, standard of performance improved and perceptual responses indicated a diminished incidence of body and visual discomfort, as well as greater perceived satisfaction with these workstation dimensions. The improved physical responses suggest a decrease in the risk of developing cumulative trauma disorders. Although subjects were unaccustomed to the wrist support device, this workstation demonstrated a further reduction in the range of wrist angles, as well as a general positive attitude towards the concept.]]> Thu 13 May 2021 05:56:42 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:21260 Thu 13 May 2021 05:19:41 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:28498 Thu 13 May 2021 01:11:28 SAST ]]>