For some, this leads to stomach discomfort, diarrhea, or constipation. Rehearsal imagery is a technique widely used by athletes and performance artists. When your long list is finished, close your eyes and visualize each of these factors in your mind's eye. Imagine in great detail your actual movements, and how your body will feel as you proceed in your glorious performance. Think of yourself sprinting around the track, following the ball from your hand into the hoop, delivering a slice serve to a specific spot on your opponent's court, passing other bikers, and pacing yourself up and down hills.
Stress is generated by fear of the unknown, and by new demands and challenges.
By imagining that you are really there, even if the actual details are unknown to you, you are familiarizing yourself with what might be, as well as how you see yourself in that situation. This strategy also reduces the element of surprise, which goes a long way when you want to reduce stress. Practice rehearsal imagery once or twice a day right up until your event. You can even tape record your description of the event and play it back, if that's easier. If possible, make a site visit to where you will be competing.