Sleep, recovery and injury risk: why sleep matters for training
Sleep is the cheapest and most effective recovery tool there is, and the one most often sacrificed. If you train hard on six hours a night, you're asking your body to adapt without giving it the time it does most of its repair work.
Does lack of sleep increase injury risk?
There's evidence that it does. In a study of adolescent athletes, those who slept less than eight hours a night on average were 1.7 times more likely to have had an injury than those who slept eight hours or more (Milewski et al., Journal of Pediatric Orthopaedics, 2014). It's an observational study, so it shows an association rather than proof of cause, but it fits with what we see in practice.
How does sleep help recovery?
During sleep, particularly deep sleep, the body releases growth hormone, repairs muscle and other tissue, and consolidates the skills you practised that day. Poor sleep also lowers pain tolerance, slows reaction time and affects mood and decision-making, all of which matter for training and injury.
How much sleep do athletes need?
Adults generally need seven to nine hours, and teenagers eight to ten. An expert consensus on sleep in athletes noted that athletes often don't get enough, and recommended that sleep be assessed and managed individually, with education and practical sleep habits as the starting point (Walsh et al., British Journal of Sports Medicine, 2020). People in heavy training often need the upper end of the range.
How do I know if I'm not sleeping enough?
Needing an alarm to wake every day, feeling flat in sessions, relying on caffeine, falling asleep within minutes of lying down, getting sick often, and sleeping much longer on days off are all signs.
Does one bad night ruin my training?
No. One poor night has little effect on strength, though hard sessions feel harder. It's weeks of short sleep that add up. After a bad night, train as planned if you feel fine, or swap to an easier session.
Do naps help?
Yes. A 20 to 30 minute nap in the early afternoon can improve alertness and help make up for a short night. Avoid long or late naps if they make it harder to fall asleep at night.
Does evening training affect sleep?
For some people, hard sessions late in the evening make it harder to wind down. If that's you, allow a couple of hours between training and bed, cool down properly, and have a shower. Many people sleep fine after evening training, and a late session is better than no session.
How does caffeine affect sleep?
Caffeine stays in your system for hours. If you have trouble sleeping, try keeping it to the morning and avoid pre-workout supplements before evening training.
Does alcohol help sleep?
It may help you fall asleep, but it disrupts sleep quality later in the night and impairs recovery. Limit it, particularly after hard training or competition.
What habits improve sleep?
Keep regular bed and wake times, including weekends. Get daylight in the morning. Keep your bedroom dark, quiet and cool. Put screens away in the last half hour, and avoid large meals right before bed. A short wind-down routine helps.
Can pain disrupt sleep, and does poor sleep worsen pain?
Both. Pain can make it hard to get comfortable, and poor sleep makes pain feel worse the next day. Sorting out sleep positions and settling the painful area can break that cycle.
See our posts on sleeping positions for back and neck pain and sleeping with sciatica.
Should I train less when I'm sleeping badly?
If you're going through a period of poor sleep, such as a new baby, shift work or a stressful stretch, reduce training volume and intensity a little rather than pushing through. Your capacity to recover is lower.
Do sleep trackers help?
They can show patterns, such as how much you actually sleep, but their stage-by-stage data isn't very accurate. Don't let a score dictate how you feel. How rested you are is the better guide.
When should I see a doctor about sleep?
See your GP for loud snoring with pauses in breathing, waking unrefreshed despite enough hours, persistent insomnia, restless legs, or daytime sleepiness that affects driving or work.
How do shift workers manage training and sleep?
Protect a main block of sleep wherever it falls, use blackout blinds and earplugs, and train at the time you feel most alert, often after waking rather than at the end of a shift. Keep sessions shorter in weeks with a run of night shifts.
How can an osteopath help?
If pain is what's keeping you awake, we assess and treat it and help you find comfortable sleeping positions. We also look at training load when recurring injuries and poor recovery go together.
See our training hub and our post on how to structure a training week. Book an assessment at our Berwick clinic. A 60-minute initial consultation is $149, with no referral needed and HICAPS on-site.
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Book an initial consultation at RISE Sports & Spinal in Berwick. Clear diagnosis, hands-on treatment, and a plan that actually gets you better.
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