Sore Wrists and/or Forearms?
When you have one hand on the keyboard, and the other hand on the mouse, you probably have had a sore wrist and forearm from time to time.
Ergonomically and Medically Speaking
Research shows that, when using a computer mouse and keyboard, supporting the forearms reduces the load on the shoulder and neck muscles. Some studies also show that such support decrease activity in the lower back muscles.
Non-neutral (or natural) wrist positions cause strain and pain. Forearm support reduces non-neutral positions, and is an important component of good ergonomic working techniques.
Ergonomic Forearm Supports are especially effective in tight desk spaces. The additional support to, to your dominant mousing arm, reduces strain on the wrist, shoulders, and lower back muscles.