The cooldown is the most under-coached session of the week

Between rounds and between sessions, what an athlete does in the twenty minutes after finishing is treated as optional and coached as ritual.

An athlete finishes hard work, stands with hands on knees, walks a lap while checking a phone, does some stretching that is really just standing around, and goes home. That is the cooldown at most tracks in the world. It is a habit wearing the costume of a session.

There is a version of it that does something, and the mechanism is worth being precise about, because the folk explanation is wrong. Easy movement after intense work does raise the rate at which the blood clears metabolic by-products compared with sitting still. That is measurable. What it does not do is deliver the dramatic next-day benefit that the ritual is usually sold on. Soreness two days later is largely unaffected. If you jog for twenty minutes expecting to feel fresh on Thursday, you will be disappointed.

Where it genuinely earns its place is within a competition, not across a week. In a championship with heats in the morning and a semi-final at night, the interval is short and the clearance rate is exactly the variable you care about. An athlete who moves gently for fifteen minutes, takes on fluid and carbohydrate immediately, and then rests properly, arrives at the second effort in better shape than one who cooled down by sitting in a plastic chair. That is the case where the physiology and the practice actually line up.

The other real benefit is nervous, not chemical. Coming down deliberately, rather than going straight from maximal effort to a car park, seems to help athletes sleep, and sleep is where the training becomes fitness. I cannot prove that for any individual. I have watched enough people fail to sleep after a night race to take it seriously.

So my complaint is not that cooldowns are useless. It is that they are unspecified. Everything else in the programme has a prescription: distance, pace, rest, number of repetitions. The cooldown has none, so it becomes whatever the group feels like, which is to say almost nothing.

Write it down like a session. Twelve minutes easy, this intensity, then food within this window. Watch how quickly it stops being the bit everybody skips when it rains.