The Complete Handbook of Keyboard & Mouse Wrist Rests

Chapter 1: Understanding Keyboard & Mouse Wrist Rests

A keyboard or mouse wrist rest is a physical support placed in front of an input device to elevate and cushion the wrist or the heel of the palm while you type or click. Its purpose is not to fix an injury, but to reduce the angle and pressure that your wrist would otherwise experience when you hold your hands in a working position. On a bare desk, your wrists are often bent backward or to the side to reach the keys. A wrist rest bridges the gap between the desk surface and the height of the keyboard or mouse, allowing your hands to stay in a straighter line with your forearms.

To understand why this matters, consider the geometry of a standard desk setup. A typical office desk is about 73 centimeters high, and a typical keyboard is roughly 2.5 to 4 centimeters thick at its front edge. When you place your hands directly on the desk to type, your wrists are forced into extension - bent upward toward the ceiling - to get your fingers onto the keys. This is not a neutral position. Extended wrists put pressure on the carpal tunnel, which is the narrow passageway for tendons and the median nerve in your wrist. Over a full workday, that repeated positioning is one of the factors associated with discomfort and conditions like carpal tunnel syndrome, though it is rarely the sole cause. The National Institute for Occupational Safety