Dana Keester, the human-factors specialist on the Consumer Reports consumer experience and usability research team, photographed them in the hand of a test subject, examining the images to see how the mice affected the position of the subject’s wrist and arm.
To help you choose the best option, CR put eight popular models to the test. The Microsoft Sculpt, for example, is like a small ramp with enough horizontal DNA to feel familiar in your hand, but enough pitch to ease the stress on your forearm. (See the Logitech MX Ergo and Logitech M570, below.) This design can be helpful if moving the mouse causes pain in your wrist.
Others use the familiar horizontal design, but remain stationary on the mousepad, using a trackball maneuvered by a thumb to steer the cursor. (See the Adesso iMouse E1 and Logitech MX910 below.) This helps reduce pronation, the twisting of your forearm when your palm faces downward. Some models slope upward, like a joystick, placing your hand in a handshake position. In response, Adesso, Logitech, Microsoft, and other companies have developed ergonomic mice, designed like ergonomic keyboards to place less stress on your wrists, forearms, and shoulders.
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