Why sleep might be the thing slowing down your recovery

When you are injured, most of the focus goes to treatment.

Rehab exercises, soft tissue work, mobility, strength work, adjustments,

all of that matters.

There is however one piece of recovery that almost everyone underestimates: sleep.

If your sleep is off, your recovery is usually slower. Not because you are doing anything wrong in the gym. Not because your body is broken. But because your body does not repair tissue efficiently without adequate sleep.

Let’s break that down.

Sleep is when your body actually repairs tissue

Recovery does not happen during your workout, it happens afterward. A big portion of that happens while you sleep.

Research over the past decade continues to show that sleep is critical for muscle repair, immune function, and tissue regeneration (Irwin, 2015; Haack et al., 2020). During deeper stages of sleep, your body shifts into repair mode. Protein synthesis increases, hormonal patterns support tissue healing, and your nervous system downshifts into a "rest" mode.

If you are cutting sleep short, you are cutting short that repair window.

You can do all the right rehab exercises, but if you are sleeping five or six hours a night, your progress may feel slower than it should.

Poor sleep increases inflammation

It's true, inflammation is part of the healing process. But too much, or prolonged inflammation, can keep you feeling stiff, achy, and sensitive.

Research shows that even partial sleep restriction can increase pro inflammatory markers in the body (Irwin, 2015). Translation: consistently short sleep can keep your system in a more inflamed state.

The National Institutes of Health highlights the strong relationship between sleep and immune regulation. When sleep is disrupted, immune balance is disrupted.

If you have ever noticed that everything feels worse after a few nights of bad sleep, that is not just in your head. There is real physiology behind that.

Less sleep can make pain feel worse

This is a big one.

Multiple reviews show a strong relationship between sleep and pain (Haack et al., 2020). Poor sleep increases pain sensitivity, and higher pain can disrupt sleep further, which unfortunately can create a cycle that perpetuates itself.

When you are sleep deprived, your pain threshold drops. The same shoulder strain or back tweak can feel more intense simply because you are not well rested.

So if your injury feels flared up after a rough week of sleep, it does not automatically mean you re-injured it. Sometimes the injury just feels more sensitive.

Sleep and injury risk

Sleep is not just about recovery, it is about prevention too.

Position statements from the American Academy of Sleep Medicine emphasize that chronic sleep restriction impacts reaction time, cognitive function, coordination, and overall physical performance.

If you are training hard but sleeping inconsistently, you are not giving your body the best environment to adapt and stay resilient.

Recovery capacity drops, decision making is impaired, coordination decreases, and injury risk goes up.

How much sleep should you aim for?

For most adults, the Centers for Disease Control and Prevention and the American Academy of Sleep Medicine recommend seven to nine hours of sleep per night.

If you are actively rehabbing an injury or training consistently, aim toward the higher end of that range.

Now let’s talk about teenagers.

For ages 13 to 18, the recommendation is eight to ten hours per night.

And most teens are not getting that.

Between early school start times, sports, homework, and screen time, sleep is usually the first thing to get cut. But this is also a phase of rapid growth, hormonal change, and high physical demand.

Less sleep in adolescent athletes has been associated with higher injury rates and slower recovery. When you combine growth spurts, high training volume, and inadequate sleep, it is not surprising that overuse injuries show up.

If you are a parent of a teen athlete, or a teen reading this yourself, sleep is not optional. It is part of your training.

A simple sleep checklist for better recovery:

You do not need a perfect routine. But you do need consistency.

If you are trying to heal, here is a simple starting point:

1. Protect your sleep window

Aim for 7 to 9 hours if you are an adult, and 8 to 10 hours if you are 13 to 18 years old, based on recommendations from the American Academy of Sleep Medicine and the Centers for Disease Control and Prevention.

Set a realistic bedtime that actually allows that to happen.

2. Keep your sleep and wake times consistent

Your nervous system likes rhythm. Try to keep your bedtime and wake time within about 30 to 60 minutes of each other, even on weekends.

3. Create a short wind down routine

You do not need an hour long ritual. Five to ten minutes of something predictable helps. This can be anything from light stretching, reading, meditation, breathwork, or low light.

It's the signal to your body that it is time to shift into recovery mode.

4. Stop scrolling earlier than you think you need to

Late night screen time pushes bedtime later and can delay melatonin release. Even moving your phone cutoff 20 to 30 minutes earlier can make a difference.

5. Do not out train poor sleep

If you slept four or five hours, that might not be the day to push intensity. Adjust & recover. Play the long game.

Recovery is not just what you do in the clinic or the gym. It is what your body can do when you give it the time and space to heal.

If your progress feels stuck, look at your sleep. It might be the most overlooked part of your rehab plan.

References

Centers for Disease Control and Prevention. (2024). About sleep and sleep recommendations. https://www.cdc.gov/sleep/about/index.html 

American Academy of Sleep Medicine. (2025). Health advisories and sleep guidance. https://sleepeducation.org/healthy-sleep/health-advisories/ 

National Institutes of Health. (2022). NIH-funded study shows sound sleep supports immune function. https://www.nih.gov/news-events/news-releases/nih-funded-study-shows-sound-sleep-supports-immune-function 

Haack, M., Simpson, N., Sethna, N., Kaur, S., & Mullington, J. (2019). Sleep deficiency and chronic pain: Potential underlying mechanisms and clinical implications (Neuropsychopharmacology, 45(1), 205–216). https://pmc.ncbi.nlm.nih.gov/articles/PMC6879497/ 

Babiloni, A. H. (2025). Sleep disturbances and chronic pain one-year outcomes. The Journal of Pain. https://www.jpain.org/article/S1526-5900%2825%2900768-0/abstract 

Sochal, M. (2024). The effect of sleep restriction on inflammatory parameters. Scientific Reports. https://www.nature.com/articles/s41598-024-68498-1