Abstract
Alternatives to reduce postural constraints have to be
sought in order to reduce musculoskeletal complaints
related to computer work. This study aimed at
documenting the impact of using the mouse on the left
side of a standard keyboard (with a right numeric
keypad) on upper-extremity posture. A simulated
computer task was performed by 27 subjects in a
laboratory before and 1 month after ergonomics
training. Shoulder flexion and abduction, as well as
wrist extension were reduced with left-handed mouse
use. Sixteen of the 27 subjects truly converted to
using the mouse with the left hand. After a month of
using the mouse with the left hand, the time required
to perform the same task reduced, the perceived
difficulty and discomfort improved, though the time to
perform the task was still longer than when using the
mouse with the right hand. For work involving both
keyboard and mouse use, and without the need of the
numeric keypad, it would probably be preferable to use
a keyboard without the numeric keypad if the mouse is
to be used on the right-hand side. If such keyboards
are unavailable, an interesting alternative would be to
use the mouse on the left side provided sufficient time
is allowed to get accustomed to it.
Users
Please
log in to take part in the discussion (add own reviews or comments).