Notice that maximal or peak performance cannot be sustained for very long. Thus conservative estimates of output should be used for sustained performance. Biological Factors Age Gender 2. Environmental Factors Altitude Temperature 3. Due to changes in the nervous system, but its measurement is complicated by motivational factors and the inherent interest of work.
Peripheral fatigue Is the result of muscular effort.
Alternating work and rest periods help to relieve fatigue from any source. There are a number of guidelines for scheduling rest breaks, but they are outside the scope of this course. Measurement of fatigue is important because accidents and injuries are more likely to occur when people are fatigued. As in most situations, prevention is generally better than cure. Specifications for other physical tasks, such as lifting and carrying, should also be made with regard to the capability of the weakest potential operator.