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e keys while typing or clicking the mouse buttons. Static force: A force that you maintain for a period of time, such as holding your mouse or cradling the phone. Contact force: A force that occurs when you rest on an edge or hard surface, such as resting your wrists on the edge of your desk. 6 X118135401mnl.indb 61/19/2006 12:12:15 PM7 To reduce the effects of low-impact forces on your body, try the following: ? Type with a light touch, keeping your hands and ?ngers relaxed, because it takes little effort to activate keyboard keys. ? Use a light touch when clicking a mouse button or when using a joystick or other gaming controller. ? Hold the mouse with a relaxed hand and do not grip the mouse tightly. ? Avoid resting your palms or wrists on any type of surface while typing (see detail 7). The palm rest, if provided, should only be used during breaks from typing. ? Relax your arms and hands when you are not typing or using your mouse. Do not rest your arms and hands on edges, such as the edge of your desk. ? Adjust your chair so the seat does not press into the back of your knees (see detail 8). Take Breaks Taking breaks can help your body recover from any activity and may help you avoid MSDs. The length and frequency of breaks that are right for you depend on the type of work you are doing. Stopping the activity and relaxing is one way to take a break, but there are other ways, also. For example, just changing tasks - perhaps from sitting while typing to standing while talking on the phone can help some muscles relax while others remain productive. To vary your daily activities and to work productively, try the following: ? Plan your work and play so that you are not doing the same thing for extended periods...