IT wrote:
Can't think of a triathlon where the swim has been the defining event of the race. Bike yes. Run yes. Having the swim last would give the swim the potential to be the defining moment of the race and perhaps we would get closer to a race where the swim, and each race segment, is critical to victory.
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The problem with the swim is a lot of good athletes can not swim! But almost every good athlete can run! To go faster in the swim takes tremendous additional energy, but to go faster in the run or bike does not require the same proportional energy expenditure.
So the swim portion is shorter, less intense and first in a triathlon.
You are right, few if any win the race based upon the swim. For my first triathlon, I was worried that my swim time was too slow, and my Coach response was: "Just don't drown and you will do well!"
As far as a close race, I would recommend watching the 2012 Oympics woman's triathlon. It was an exciting race all the way to the finish. Sara True was dropped on the run, came back and was challenging for a medal during the last few minutes and took 4th place, 12 seconds behind the winner. And if I recall the winner was determined by a photo finish!
The fastest swim time was 19:04 and the winner's time was 20:04. Pretty close with a bike and run still to go. Sara beat the eventual winner by 7 seconds in the swim, but lost to her by 12 seconds in the end. A 7 second lead does not last long. Because the swim is so short and in comparison the bike and run are longer, then a lead in the swim can vanish quickly. If we want the swim to dominate the race then we need to double the swim distance without changing the bike or run distances.
But for a sprint race in July, I would love to do the swim last especially when the air temps are 90-100 degrees! What a way to cool down while still racing!