You're Training Hard. But Are You Sleeping for Performance?

Sleep Is Part of Your Training

You're following your training program, working on your strength, paying attention to nutrition and putting in the sessions but are you giving your body enough sleep to get the most out of that work?

Sleep is a fundamental part of athletic performance. It supports physical recovery, brain function and readiness for the next training session.

Research published in Sports Medicine in 2022 examined the effects of acute sleep loss on physical performance. The systematic review and meta-analysis included 69 publications and found an average performance decline of 7.56% following sleep loss across the outcomes analysed.

For athletes, that's worth paying attention to.

What Happens to Performance When You Lose Sleep?

The researchers examined several types of physical performance, including strength, speed and power endurance, anaerobic power, endurance, high-intensity interval exercise and skill-based tasks.

Sleep loss negatively affected performance across all the exercise categories examined, although the size of the effect varied.

Here's what stood out.

Speed and power

Explosive performance matters in sprinting, jumping and other power-based sports. When results are separated by fractions of a second, preparation matters. Sleep belongs in that preparation.

Strength and high-intensity training

The analysis found reduced performance following sleep loss in strength, anaerobic power and high-intensity interval exercise. Completing a workout and performing at your best are two different things.

Endurance

Endurance performance declined by an average of approximately 5.55% across the outcomes analysed. Sleep deserves attention alongside training load, nutrition and recovery when you're working to sustain performance.

Skill and coordination

Skill-based performance showed an average decline of approximately 20.9%. This estimate came from a smaller evidence base, and the tasks varied, but it highlights an important point: athletic performance isn't just about physical capacity. Timing, coordination, concentration and execution matter too.

The message is straightforward: sleep loss compromises physical performance.

Sleep Debt: The Cost of Cutting Sleep Short

Sleep debt is the accumulated shortfall between the sleep you get and the sleep you require.

If you regularly sleep six hours when you function best on eight, you're consistently missing two hours of sleep opportunity each night.

That doesn't mean sleep debt can be calculated precisely by adding up missed hours, but repeated sleep restriction leaves less opportunity for recovery and affects daytime functioning.

The research above examined acute sleep loss, not the long-term effects of chronic sleep debt. However, it reinforces why regularly sacrificing sleep deserves attention.

Athletes often look for improvements in training, technique, strength and nutrition, yet consistently cutting sleep short works against the goal of arriving at training rested and ready to perform.

More training isn't automatically better training. The quality of your recovery matters.

Does It Matter When You Sleep?

Yes. The study found that the effects of sleep loss varied according to the pattern of restriction and the timing of exercise.

Performance effects were generally more consistent in afternoon and evening exercise than in morning exercise. The researchers also found more consistent negative effects following total sleep deprivation and sleep restriction involving earlier waking.

This isn't an argument for training early or sacrificing sleep to fit in a morning session. It's a reminder to consider sleep when planning training and competition, particularly around early starts, travel and demanding sessions.

How Much Sleep Do Athletes Need?

Seven to nine hours is the general recommendation for adults. Athletes with demanding training schedules often benefit from additional sleep, depending on their individual requirements.

The aim is sufficient, consistent, good-quality sleep.

Start with five fundamentals:

1. Allow enough time for sleep. Set your bedtime around the time you need to wake, rather than continually cutting sleep short.
2. Keep a consistent schedule. Regular sleep and wake times support your body clock.
3. Create a sleep-friendly environment. Keep your bedroom dark, quiet and comfortably cool.
4. Reduce evening stimulation. Give yourself time to wind down before bed.
5. Review your recovery. Persistent fatigue deserves attention. Consider sleep, training load, nutrition, stress and your overall health.

Make Sleep Part of Your Performance Strategy

Athletes don't leave strength training, nutrition or competition preparation to chance. Sleep deserves the same consideration.

The evidence is clear that acute sleep loss negatively affects physical performance across multiple exercise categories. The degree of impact depends on the task and the conditions, but the overall direction of the findings are consistent.

You don't need another complicated performance strategy. Start with the fundamentals.

Train well. Eat well. Sleep well. Recover. Repeat.

You don't have to do more. You have to get more from what you're already doing.

Make Space for Rest with Sleep Soundly

Sleep Soundly by Earthly Alchemy offers the Sleep Soundly Delta Soundscape™ Journey, a collection of six immersive audio soundscapes designed to accompany your evening wind-down routine.

Make time for rest. Give sleep the attention it deserves.

Explore Sleep Soundly

This article is for educational purposes only and is not medical advice.

Research

Craven, J., McCartney, D., Desbrow, B., Sabapathy, S., & Irwin, C. (2022). Effects of Acute Sleep Loss on Physical Performance: A Systematic and Meta-Analytical Review. Sports Medicine, 52, 2669–2690.

Read the original research