Motions performed only infrequently, even if performed in an awkward position, seldom result in any bodily harm. However, as a particular motion becomes more and more frequent, the risk of injury increases. With keyboard work, some motions are repeated as often as every few seconds, and some even faster. When performed for prolonged periods, e.g., hours without a break, fatigue and strains accumulate. Changing tasks during the day, or taking periodic breaks, can provide muscles and tendons with the time needed to “recover” to their normal unstressed state.
  • Long periods of steady hand movement doing tasks that are repeated over and over,
  • Holding the same position for a long time,
  • Working in an awkward position,
  • Forceful movements,
  • Not enough time to rest between repetitive tasks.