When mice stand up

This paper presents a laboratory study. This study compared muscular and postural stresses, performance and user satisfaction when using a standard mouse and two vertical mice - one with a 25° angle (V25) and the other with a 55° angle (V55) to the vertical - placed in 3 different positions on the desktop, while performing tasks involving pointing, clicking, moving a target and re-grasping the mouse after typing.
The V55 seems to give the best compromise in terms of muscular and postural stresses, performance and user satisfaction. Placing the mouse in front of the keyboard, rather than next to the keyboard, reduces muscular stress. Performance and user satisfaction were greater when the mouse was freely positioned on the desktop. However, the free positioning of the mouse requires removing the keyboard, which is rarely seen in daily practice. Re-grasping the mouse after typing was the most stressful task.