RollerMouse minskar muskelansträngningen i underarmen med upp till 20 %

Forskare vid Harvards universitet har i en studie funnit att RollerMouse ger en betydligt bättre ställning för handleder och axlar vid arbete framför datorn, jämfört med en vanlig mus. Studien jämförde RollerMouse med en vanlig mus, styrkula och pekplatta, och man kunde fastställa att RollerMouse hade störst effekt när det gällde att minska muskelansträngningen i underarmen. Testpersonerna rapporterade också att RollerMouse var enkel att använda med minsta möjliga obehag när de utförde sina uppgifter.

 

Abstract (ur rapporten, som presenterades vid Applied Ergonomic Conference 2013 den 19 mars 2013):

The goal of this study was to evaluate the effect of different types of computer pointing devices and placements on posture and muscle activity of the hand and arm. A repeated measures laboratory study with 12 adults (6 males 6 females) was performed where participants completed two mouse-intensive tasks while using a generic mouse, a trackball, a stand-alone touchpad, and a roller-mouse. An optical motion analysis system and an electromyography system monitored right upper extremity postures and muscle activity respectively. Roller-mouse associated with a more neutral hand posture (including lower inter-fingertip spread, finger extension) along with significantly lower forearm extensor muscle activity. Centrally located pointing devices (the touchpad and the roller-mouse) were associated with significantly more neutral shoulder postures and reduced ulnar deviation. In addition, significantly lower forearm extensor muscle activities were observed for these two devices. Despite being unfamiliar with the device, users reported that the roller-mouse was not more difficult to use than the other devices. These results show that both device design and location illicit significantly different postures and forearm muscle activities during use; and suggest that hand posture metrics may be important when critically evaluating pointing devices and their association with musculoskeletal disorders.

Please note: This study was presented on March 19th at the 2013 Applied Ergonomics Conference. It is still in the peer review process and will be updated and changed as needed.

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