HP Jornada 680 HP Jornada 680/680e Handheld PC User's Guide - Page 178

172 ï HP Jornada 680/680e User’s Guide What causes RSI? RSI is caused by certain demanding activities that exceed the body’s ability. Common factors associated with RSI include too many uninterrupted repetitions of an activity or motion, performing an activity in an awkward or unnatural posture, maintaining static posture for prolonged periods, failing to take frequent short breaks, and stress. Certain medical conditions, such as rheumatoid arthritis and diabetes, may contribute to RSI. RSI symptoms By following the guidelines on proper setup and use of equipment and work environment, the risk of developing RSI can be minimized. However, if you experience any discomfort, seek professional advice immediately. Typically, the earlier a problem is diagnosed and treated, the easier it may be to resolve. Avoiding RSI Recent literature suggests that there may be a relationship between injury to soft tissues, especially in the hands and arms, and the prolonged use of keyboards or other equipment requiring repeated motion of the hands and forearms. Literature also suggests that there are many other risk factors that may increase the chances of such soft-tissue injury. You can minimize the risk of suffering from RSI by following the guidelines detailed in this chapter. Setting up your working environment You must have enough space to move around and vary your position. To avoid eye strain, the ceiling, walls, and floors should have a medium level of reflectance (approximately 75 percent of ceiling reflectance, 40 percent of wall reflectance, and 30 percent of floor reflectance). Try to avoid excessive contrast between the screen and its surroundings. The work environment should be as quiet and distrac-