Diagram demonstrating the stress curve. The Y-axis represents performance and the X-axis represents stress level. Starting at the left, the lower points on the curve are labelled inactive and laid back. This section is labelled on the X-axis as ‘too little stress (underload)’. The next section on the X-axis is labelled ‘optimum stress’, and on the outer edge of the performance axis, the label is ‘fatigue’. The next label on the X-axis is ‘too much stress (overload)’ and this is labelled ‘exhaustion’ on the Y-axis. The final label on the X-axis is ‘burnout’ and the two labels on the Y-axis corresponding with this are ‘anxiety/panic/anger’ and ‘breakdown’.