The ergonomic mouse fits natural and comfortable under the palm of your hand,ergonomic mouse should be held loosely. avoid the use of a wrist pad.Movement of the ergonomic mouse should come from the whole arm and shoulder, not just the wrist.
The ergonomic mouse should be positioned at the same height as the keyboard when use it on a plane (e.g. on a table) as conventional mouse, and directly adjacent to avoid reaching (if there is at a wider angle than 110 degrees between your arm and forearm, this is considered reaching).Avoid holding the index finger elevated between clicks.
It takes a bit of time to get used to it but a day or two is about all it take.