Vertical mice offer a good alternative to a center mouse when it comes to ergonomic mouse working. The vertical mouse provides a neutral, relaxed position for the hand and wrist. When the wrist is in its natural position, the blood circulates properly and the movements do not strain the hand in the same way as a traditional computer mouse. Vertical mice are generally believed to be more suitable for accurate mouse work than center mice, while providing an ergonomic position for the hand.
The use of an forearm support significantly reduces the pressure on the shoulders and neck. Sit or stand near a table. Work your arms close to your body centrally relative to the keyboard. Work your hands as flat as possible to prevent RSI (Repetitive strain injury).