I can see how it would possibly help focus on how, you would play out the race in your head if, it was a time trial but what about with bunches.
I completely understand the power of mind over matter, as I had managed to psych myself out of pain during races as I was getting close to peak ability so I am not doubting it's use. After all, the difference between the elite and mere mortals is the ability to focus and become single minded in you approach to training and competing. 
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