Sleep: the recovery tool nobody schedules

Every camp has a training plan and a nutrition plan. Almost none of them has a sleep plan, and sleep is the only one of the three that is free.

Ask any coach whether it matters and you get the same answer. Then look at the schedule: a session at seven, a session at six, travel, a promoter's obligation in the evening, and nobody has written down what time anybody goes to bed.

The numbers on this are unusually clean for a recovery topic.

The injury number

A study of 112 adolescent athletes found that those sleeping fewer than 8 hours a night were 1.7 times more likely to sustain an injury than those sleeping eight or more.

What makes that study worth quoting is the second finding. Hours of sleep and school year, the latter standing in for training load, were the two strongest independent predictors of injury. Not flexibility, not strength scores.

Sleep and workload.

Roughly half of elite athletes are reported to sleep less than the recommended 7 to 9 hours.

What happens going the other way

The interesting research is on extension, more than on deprivation.

Collegiate basketball players who pushed to 10 hours a night for 5 to 7 weeks, having been tracked at around seven and a half beforehand as their own control, ran faster sprints, shot more accurately and reacted faster.

Professional rugby players ran a sleep extension programme through pre-season while training up to 3 times a day. Sleep quality improved, time in bed rose by around 7%, and two other things moved.

Four percent of reaction time sounds small until you translate it into a sport where the difference between slipping a shot and wearing it is measured in fractions of a second.

Why this hits combat sport harder

Three reasons, and they stack.

Reaction time and vigilance are the product. In most sports a slow response costs possession. In this one it costs a punch to the head, and the effect compounds through every sparring round of a camp.

Camp is a two-a-day environment. The recovery demand is highest exactly when the schedule leaves least room for it, and the first thing that gets squeezed is the end of the night.

Hunger and sleep argue with each other. A fighter in the middle of a cut is going to bed underfed. That is my observation across camps rather than a controlled finding, and I name it as one, because a study that monitored a combat athlete through both chronic and acute weight loss found his sleep largely held up: efficiency rose, total sleep time dipped modestly in the final phase, and no significant relationship emerged between his energy availability and his sleep.

So the mechanism is not proven. What is proven is the cost of losing the hours, whatever the reason for losing them.

What extending sleep does, and the trick worth knowing

Most of what gets written about sleep in sport is about losing it. The more useful half is what happens when an athlete deliberately gets more, and a review of sleep hygiene for recovery in athletes sets both sides out.

Read the left column against what a fighter does. Reaction time, accuracy, submaximal strength and decision-making are the sport itself.

And the right column matters because it is not symmetrical with the left. Extending sleep is not simply the absence of a deficit.

In the studies it produced measurable gains in athletes who were not obviously sleep-deprived to begin with.

On supplements for sleep, the one with real evidence behind it is melatonin, and only for one specific use.

What actually moves the needle

Put it in the plan as a number. Lights out at a stated time, the same way a session has a stated time. Intentions do not survive fight week; a written time does.

Work backwards from the first session. If training starts at seven, the night has to start at 11 for 8 hours to be possible. Most camps discover the arithmetic only after they have failed it.

Nap deliberately, not accidentally. A short afternoon sleep between two-a-days is a tool in the same category as the meal in between. The rugby programme used strategic napping as part of the intervention.

Nothing that fragments it. Alcohol shortens the time to fall asleep and degrades everything after, which is the opposite of what a hard block needs.

Control the room. Dark, cool, quiet. This is the cheapest intervention in all of sport and the one most often skipped because it feels too simple to matter.

Protect the evening meal. Going to bed hungry to save calories buys nothing if it costs an hour of sleep.

If the day's food has to be reduced, reduce it somewhere that does not sit against bedtime.

Move the travel. Late flights and early alarms in the middle third of a camp cost more than a missed session, because they take the recovery from the sessions on either side.

The argument I actually have with coaches

It is never about whether sleep matters. Everybody agrees on that in the first 30 seconds.

It is about what gets sacrificed for it. A media obligation, an early start that suits the gym's booking, a training block moved for somebody else's convenience. Sleep is the one part of the programme with no advocate in the room, because missing it produces nothing visible on the day.

An underfed session looks bad immediately. A short night looks like nothing at all, and then shows up 6 weeks later as an injury or a bad round nobody can explain.

If you change one thing

Write down the time the lights go out, and treat it exactly like the time the session starts.

Not more supplements, not a new recovery gadget. A number on the same sheet as everything else, defended by the same person who defends the training plan.

The one supplement with a defensible case for an evening dose, and the form that matters, is covered in magnesium.

On the supplement most often reached for when sleep breaks down in camp, and why its evidence is weaker in trained athletes than the headlines suggest, see ashwagandha.

On the supplement most often bought for sleep on the strength of its melatonin content, and why the effect in athletes may not come from melatonin at all, see tart cherry.