The immovable date
In league sport, form can arrive late and still matter. At a single-event championship there is no such forgiveness: the schedule is published years ahead and cannot be negotiated with. Everything in a training plan therefore works backwards from one morning, which makes preparation less like building fitness and more like landing an aircraft at a predetermined second.
The taper is a gamble
In the final weeks athletes reduce load so that accumulated fatigue clears and the body expresses the fitness it has built. Cut too little and they arrive tired; cut too much and they arrive fresh but flat. There is no way to verify the choice in advance, because testing it properly would itself disturb it. It is an educated bet placed once.
Why early brilliance worries coaches
An athlete producing career-best numbers weeks before the event is not obviously good news. It may mean the peak has arrived early and will decay. This is the counterintuitive heart of championship preparation: the aim is not to be as good as possible, but to be as good as possible on a date somebody else chose.