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# Over-hydration
# Breaking [[The Golden Rule of Racing]]
# [[Going out too fast]]
# Unreasonable expectations
# Lack of fuel in the race
''Main article: [[Going out too fast]]''
[[Going out too fast ]] at the start of the marathon is one of the most common problems I see. This is caused partly by the excitement of the race, but also by the optical illusion of having runners around you. On most training runs we have nobody blocking our vision, so we see our forward motion represented by the ground and scenery appearing to move towards us. At the start of most marathons all we can see is other runners, and many of them are going faster, so it appears we are either stationary or going backwards. This optical illusion makes it hard to judge the actual pace. The consequence of going out too fast can last for the whole race. This initial high intensity creates an oxygen debt that increases glycogen usage and can upset in the metabolic processes.
==Race Mistake 4 - Unreasonable expectations==