Left hand mousing has also been found to improve wrist postures (Delisle, 2004). Because you sit centered in front of the letters, keeping the mouse on the left allows a much more relaxed shoulder posture, as shown in the photo above. The extra reach is due to the number pad on the right hand side of the keyboard. Mousing on the right side of the keyboard actually requires you to reach further to the mouse than if it were located on the left hand side.
People who are right-handed tend to do almost everything with the right hand mousing with the left hand provides an opportunity to more evenly distribute some of that workload between both hands. Here are three strong arguments for left-hand mousing, particularly if you are a right-handed person. This is the traditional “default”, because we thought that we needed dexterity to operate a mouse. When you walk through an office, you will find most mice located on the right hand side of the keyboards.
Are you still mousing with your right hand? If so, you must read further.
