Avoiding overexertion of the arms and shoulders can prevent many cases of RSI. Warming up and stretching the muscles before activity may decrease the risk. Using proper body mechanics may also lessen the risk of injury.
Ergonomics is the practice and study of arranging work equipment to allow for more comfort and less strain on the body. There are many ergonomic products, such as wrist pads, height adjusters on keyboard holders, and wrist support braces. These products are intended to decrease the stress on muscles, tendons, tissues, and nerves of the arms.
Taking regular breaks during repetitive activities, and doing strengthening exercises may help. Learning proper methods of sitting, positioning the feet, lifting, and bending may also decrease the risk of RSI. Many causes cannot be prevented.