There is a lot to be said for using a vertical mice, especially if you are worried about RSIs such as tennis elbow and tendonitis.
The repetition of movements when it comes to using a computer is almost impossible to avoid, but by making adjustments like switching to a vertical mouse, you can ensure that you interact with it in the healthiest way possible.
With a vertical mouse your fingers will be supported, there will be no forearm pronation, and the stress will be taken off your wrist.