Why Elite Athletes Need More Sleep: A Coach's Guide to Peak Performance
- Dr Paul McCarthy
- 5 hours ago
- 17 min read
Sleep for athletes means much more than just rest—it serves as a vital performance booster that many competitors overlook. Research shows that 39.1% of athletes get insufficient sleep (less than 7 hours). My experience as a performance coach has shown how this lack of sleep undermines the goals athletes work so hard to achieve.
The evidence supporting sleep's effect on athletic performance is compelling. A Stanford study revealed that basketball players who slept 10 hours each night improved their accuracy by at least 9% in free throws and three-point shots. They also ran faster in sprints. The benefits extend to other sports too. Swimmers who got more sleep showed quicker reaction times off diving blocks and better turn times. The athlete's body repairs and grows muscles while they sleep. It also regulates hormones and builds a stronger immune system.
This piece explores why elite athletes need more sleep than average people. You'll learn
how sleep affects performance metrics and discover practical strategies coaches can use to help athletes maximize their sleep recovery. Understanding sleep's role in athletic performance could give you the competitive edge needed for peak performance, whether you work with professionals or develop young talents.
Why sleep is a performance tool, not a luxury
Sleep isn't just another checkbox for top athletes—it's the life-blood of their training program. The two-way relationship between sleep and exercise means better sleep can boost your performance. Quality sleep also promotes higher physical activity levels during the day [1].
Sleep as a foundation for recovery
Sleep works as a complete system for physical repair, cognitive function, and emotional well-being, unlike other recovery methods that target specific areas. The body goes through vital restorative processes during sleep that can't happen when you're awake.
Your body releases growth hormone mainly during sleep. This hormone helps restore and build muscle. Research shows the pituitary gland releases 95% of daily growth hormone during non-rapid eye movement (NREM) sleep [2]. Deep sleep becomes the prime time for your body to repair and restore itself after tough training sessions.
Sleep also plays a key role in hormone balance. The levels and timing of anabolic (testosterone) and catabolic (cortisol) hormones—vital for muscle adaptation and growth—follow daily rhythms. Poor sleep disrupts these patterns [2]. Athletes who don't get enough sleep see higher cortisol levels and changed testosterone patterns, which can throw off their anabolic-catabolic balance [2].
Poor sleep hurts recovery by:
Athletes who make sleep a priority gain a real edge in their recovery ability.
How elite training increases sleep needs
Athletes need more sleep than regular adults because of their intense training. While most adults need 7-9 hours, top athletes need substantially more.
Research on athletes' sleep patterns shows some worrying trends. Studies found elite athletes sleep only 6.7 hours on average, even though they say they need 8.3 hours to feel rested—leaving them short by 96 minutes each night [4]. Individual sport athletes get about 6.5 hours of sleep, while team sport athletes manage 7.0 hours [2].
This lack of sleep happens right when athletes need it most. The International Olympic Committee sees sleep as basic to recovery and essential for managing training schedules [5]. Sleep experts say:
Research strongly supports extra sleep for better performance. Basketball players who slept 10 hours each night ran faster sprints and shot more accurately [4]. Swimmers who got 10 hours of sleep showed better reaction times, turns, and kick strokes [4].
Extra sleep isn't just about avoiding tiredness—it's a powerful tool for improvement. Getting more sleep than the basic amount creates measurable advantages that training alone can't match. Many top athletes now use extra sleep as part of their strategy to boost performance, giving it the same attention as their training and nutrition plans [4].
Getting enough sleep can be tough with packed athletic schedules. The best athletes set themselves apart by seeing sleep as a vital performance tool rather than a luxury elite performers.
The science behind sleep and athletic performance
Sleep represents nature's most sophisticated recovery system through its biological processes. Quality sleep acts as the ultimate performance multiplier for athletes at every level, and understanding these mechanisms shows us why.
Muscle repair and growth during deep sleep
The body repairs and grows most effectively during non-rapid eye movement (NREM) sleep, specifically stages 3 and 4 of deep sleep. Growth hormone plays a vital role in muscle repair, tissue growth, and bone health during these stages. Research shows the pituitary gland releases about 95% of daily growth hormone production in this phase [6].
This hormonal activity does more than just make you feel refreshed - it directly boosts your athletic ability. Your body stays busy during deep sleep:
Repairs microtears in muscle fibers from intense training
Replenishes glycogen (your primary muscle energy source) [7]
Reduces inflammatory markers that slow recovery
Strengthens connective tissues to prevent injury
No other recovery method can match these processes. Studies of marathon runners revealed their total sleep time increased by a lot compared to normal times for four nights after a 92 km race. The percentage of deep sleep went up on both first and second nights [8]. This natural increase in sleep shows how much the body needs extra deep sleep after extreme physical effort.
Hormonal balance and immune function
Sleep creates the perfect hormonal environment for recovery and adaptation. Proper sleep maintains the balance between anabolic (tissue-building) and catabolic (tissue-breaking) hormones - particularly testosterone and cortisol. These hormones follow circadian rhythms and get disrupted when you don't sleep enough [6].
Poor sleep leads to more cortisol production and altered testosterone patterns, which can hurt muscle adaptation and growth [6]. It also lowers body temperature and weakens immune function. This triggers inflammatory agents, raises blood pressure, and increases the risk of cardiovascular disease [2].
Sleep's relationship with immunity matters a lot for athletes. It strengthens immune system activity through neurological and endocrine systems. Melatonin protects cells from oxidative damage while promoting needed tissue inflammation [2]. Moderate exercise helps immunity, but intense training can temporarily suppress it. Sleep becomes the deciding factor in keeping an athlete's immune system strong [5].
Cognitive processing and memory consolidation
Many athletes find sleep's effect on cognitive performance surprising. REM sleep helps restore cognitive function, showing similar EEG activity patterns to wake periods [6]. This high neural activity during REM sleep helps consolidate memories and motor skills.
Better sleep the night after learning something new leads to better recall the next day [6]. Athletes who sleep well learn and retain skills better. A good night's sleep literally builds the neural pathways that make new techniques permanent.
Poor sleep hurts cognitive performance [6]. It slows reaction time and reduces attention, working memory, and executive function - all key elements for athletic success [9]. A basketball study showed sleep-deprived players' shooting accuracy dropped by 50%. Players who got 10+ hours of sleep saw a 10% improvement - a possible 60% performance difference [10].
Sleep works as the body's ultimate optimizer. It repairs physical damage, regulates hormones, and boosts cognitive abilities. These processes create the foundation for peak athletic performance.
What happens when athletes don’t get enough sleep
Sleep deprivation does more damage than just making you feel tired. Athletes who cut corners on sleep waste their training efforts and hurt their performance in subtle yet serious ways. Let's get into what happens to athletic ability when sleep becomes less important than other things.
Slower reaction times and poor decision-making
Lack of sleep attacks an athlete's brain functions, which are vital to competitive performance. Just one night of poor sleep (less than 6 hours) can slow down reactions by 7-10%. No amount of training can fix this drop in performance. A tennis player might miss a serve they would normally return perfectly.
The brain's decision-making hub—the prefrontal cortex—takes the biggest hit from sleep loss. This becomes a real problem in team sports and strategic games where quick decisions make all the difference. Basketball players who don't get enough sleep miss more shots, make fewer good passes, and mess up their game strategy more often.
While athletes might look physically fine when short on sleep, their mental tools take a big hit. Here's what happens:
Pattern recognition drops by up to 70%
Mental flexibility goes down, making it harder to adapt during games
Timing and anticipation suffer, especially when quick responses matter
Risk assessment becomes much worse
Increased risk of injury and illness
Poor sleep creates the perfect recipe for injuries by hitting several body systems at once. Your body loses its sense of position and movement in space, which leads to mistakes in movement patterns. Poor coordination mixed with slower reactions creates dangerous situations, especially in contact sports or activities needing precise moves.
Studies of college athletes showed those who slept less than 8 hours got injured 1.7 times more often than their teammates who slept well. Young athletes face even bigger risks - those getting less than 8 hours of sleep get injured almost twice as much as peers who sleep 8+ hours each night.
Sleep loss weakens the immune system too. Athletes who sleep less than 7 hours are 2.94 times more likely to catch upper respiratory infections than those getting 8+ hours. Elite athletes who train hard face even bigger immune system problems because intense training adds more stress.
On top of that, it makes vaccines less effective and makes illnesses last longer - both big problems for athletes with tight competition schedules.
Mood swings and mental fatigue
The emotional toll of sleep loss might be its worst effect on emotional control and mental stamina. Sleep-deprived athletes usually show:
Strong emotional reactions, especially to negative feedback and criticism. They get frustrated with teammates, overreact to referee calls, or struggle with coaching advice.
Lower pain tolerance makes normal training feel worse. This mental amplification of pain can make athletes quit workouts early or move in ways that might cause injury.
Less motivation and drive, especially for long tasks needing focus. Even top athletes can't maintain endurance tasks as long when they're short on sleep.
Weaker resilience during tough competitions. Tired athletes handle pressure poorly and struggle to bounce back from setbacks during competition.
These sleep-related problems create a snowball effect: mental mistakes lead to worse performance, causing frustration, which hurts focus and execution even more. Breaking free requires treating sleep as a must-have foundation for peak athletic performance, not just an optional recovery tool.
How much sleep do elite athletes really need?
Elite athletes face a much higher sleep requirement than the typical 7-9 hours most adults need each night. The gap between what athletes need and what they actually get is quite eye-opening.
General recommendations vs. elite needs
High-performance athletes have different sleep requirements. Research shows they need about 8.3 hours to feel properly rested [11]. The reality is they only get 6.7 hours on average - that's a 96-minute deficit every night [11]. These problems are systemic, and only 3% of athletes get enough sleep to meet their self-assessed needs [11].
Yes, it is true that elite athletes need more sleep than the average person. While most people do fine with 7-8 hours, top athletes need 9-10 hours per night [12]. Olympic athletes and elite competitors should get at least nine hours of sleep each night [6]. Sleep is just as crucial as training and nutrition at this level.
There's an interesting difference between individual and team sports. Athletes who compete alone typically sleep less (6.5 hours) compared to team sport athletes (7.0 hours), even though they have similar sleep needs [11]. Training schedules and competition demands likely cause this variation.
Sleep extension and performance gains
Sleep extension is one of the most effective ways to boost performance. Athletes who sleep longer see real results. Basketball players who increased their sleep to 10 hours each night showed amazing improvements. Their sprint times dropped from 16.2 to 15.5 seconds [4], and they scored more free throws and three-pointers [4].
The benefits don't stop at basketball. Swimmers who got more sleep had faster reaction times and quicker turns [8]. These improvements show up across different sports, which suggests better sleep helps with basic body functions rather than sport-specific skills.
Getting two extra hours of sleep (aiming for 9+ hours for elite athletes) leads to measurable gains [13]. One study asked athletes to spend at least 10 hours in bed each night. This led to them sleeping an extra 110.9 minutes on average [4], which directly improved their athletic performance.
The practical takeaway here is clear. Athletes should "bank sleep" before competitions or during intense training. Endurance athletes especially benefit from sleeping more than 8 hours each night [14].
The role of naps in recovery
Naps are a powerful tool for athletes who can't get enough nighttime sleep. A quick 20-30 minute nap can improve sprint performance and peak jump velocity [14]. Even short sleep periods make a real difference.
Athletes get the best results when they:
A midday nap after morning training helps recovery between same-day sessions. Rugby players who took 35-minute daytime naps showed better afternoon power output and felt less tired during exercise [16]. These athletes also started going to bed earlier and slept about 30 minutes longer at night [15].
Naps become crucial when athletes don't get enough sleep. After getting only 3-4.5 hours of night sleep, a 30-minute nap helped athletes perform better in squat jumps and countermovement jumps after tiring exercise [15].
The message is clear - better sleep through nighttime extension and smart napping gives athletes powerful tools to enhance their recovery and performance.
Understanding sleep quality vs. quantity
Sleep quantity alone doesn't guarantee athletes the restorative benefits they need to perform their best. Research shows a clear pattern when comparing elite athletes to non-athletes: athletes often get much lower quality sleep even when they spend the same amount of time in bed [8]. The difference between sleep quantity and quality plays a crucial role in athletic recovery.
Why 8 hours isn't always enough
Most adults just need 8 hours of sleep to avoid brain function deficits [8]. This doesn't work for elite performers. A study of Olympic athletes revealed that while they spent more time in bed than non-athletes, they took longer to fall asleep (18.2 ± 16.5 min vs. 5.0 ± 2.5 min) and had worse sleep efficiency (80.6 ± 6.4% vs. 88.7 ± 3.6%) [8].
Athletes might spend 8 hours in bed but get nowhere near enough restorative sleep. This quality gap explains why many athletes feel tired despite sleeping long enough. To cite an instance, elite athletes said they needed about 8.3 hours of sleep to feel properly rested. They got only 6.7 hours on average [17], creating a big recovery gap.
Sleep architecture makes this quality difference clearer. Norwegian chess players who climbed in rankings showed different sleep patterns than those who dropped. They got less REM sleep, more deep sleep, and had lower breathing rates [6]. This suggests that sleep stage composition affects recovery and performance more than total hours.
Signs of poor sleep quality
Athletes should watch for these signs that suggest their sleep isn't helping them recover well:
Extended sleep latency – Taking more than 20 minutes to fall asleep regularly needs attention [1]
Frequent waking – 43% of athletes wake up early before competitions, while 32% wake up during the night [8]
Morning fatigue – Feeling tired despite enough time in bed
Cognitive/emotional processing – 48% of athletes can't stop thinking about their sport at bedtime, which associates with worse clinical sleep issues and less sleep [17]
Daytime sleepiness – 60.9% of college athletes feel "tired, dragged out, or sleepy during the day" at least 3 days each week [18]
Studies show sleep quality problems are systemic - 52% of elite athletes score ≥5 on the Pittsburgh Sleep Quality Index (PSQI) [3], showing poor sleep quality. Team sport athletes take longer to fall asleep but sleep longer compared to individual sport athletes [3].
Tracking and measuring sleep recovery
Measuring sleep quality needs different tools than just tracking hours. Polysomnography (PSG) remains the best standard by recording multiple body signals [19]. PSG equipment costs too much and feels too bulky to use long-term with athletes.
Actigraphy has become the quickest way for practitioners and sports scientists to track sleep [20]. These wrist devices track body movements continuously and show long-term sleep-wake patterns. Studies prove they detect sleep periods accurately (91-96%) but don't catch wakefulness as well (around 50%) [20].
In spite of that, newer wearables track more than just movement. They measure skin temperature, pulse oximetry, heart rate, and heart rate variability [20]. These advances help predict sleep stages better, though they still don't match PSG accuracy.
Athlete-specific questionnaires work well for subjective assessment. The Athlete Sleep Screening Questionnaire (ASSQ) catches clinically relevant sleep problems. The Athlete Sleep Behavior Questionnaire (ASBQ) looks at athlete-specific sleep habits [20]. These specialized tools work better than general questionnaires that miss athlete-specific issues.
Note that six hours of quality sleep helps more than eight hours of mediocre sleep [21]. Your body's recovery from training depends on how well you sleep, not just how long you stay in bed.
Sleep hygiene strategies for peak performance
Sleep hygiene gives athletes a competitive advantage when they aim for peak performance. Simple changes to your environment and daily habits can improve both sleep quality and duration.
Creating a sleep-friendly environment
Your bedroom needs to be your sleep sanctuary. Studies show the best sleeping temperature ranges between 60-67°F, which is cooler than what most athletes set [22]. Your body needs to drop its core temperature by 2-3 degrees to trigger sleep [23].
Darkness plays a vital role—blackout curtains block out light that interferes with melatonin production [22]. Using fans or white noise machines helps mask disruptive sounds and keeps sleep cycles steady [24].
The bedroom should only be used for sleep and intimacy to build strong sleep associations. A calm environment signals your brain it's time to rest, so remove electronics, work items, and clutter from your space [22].
Pre-sleep routines and screen time
Your body needs the right signals to recover well. Start by switching off all electronics 90 minutes before you sleep [22]. Screen time at night can wreak havoc—research shows reading on an iPad for an hour before bed pushes back melatonin production by three hours and cuts REM sleep in half compared to reading a physical book [23].
You can wind down better with gentle stretches, paper books, journaling, or meditation [6]. A warm bath or shower works really well—it raises your skin temperature by about one degree, which helps lower your core temperature for better sleep [22].
The key is sticking to a routine—sleep experts recommend going to bed and waking up at the same time daily, even on weekends [23].
Managing caffeine, alcohol, and late workouts
Timing is everything when it comes to substances that affect sleep. We found that caffeine after noon can mess with various sleep metrics including how quickly you fall asleep and how well you stay asleep [7]. While alcohol might make you drowsy, it disrupts your sleep quality, especially in the later hours [24].
Your workout schedule needs careful planning. A recent study of almost 15,000 people revealed that high-intensity exercise within four hours of bedtime can hurt sleep quality [25]. People who did intense workouts two hours before their usual bedtime slept 22.2 minutes less (5.4% shorter) and had poorer sleep compared to those who did light exercise [26].
Sometimes late workouts can't be avoided. In these cases, stick to lighter training or finish at least four hours before bed [26]. If you must train late, try relaxation techniques afterward to counter the elevated heart rate and arousal that make it harder to fall asleep [27].
Managing travel, jet lag, and circadian rhythm
Elite athletes face unique sleep challenges when they travel through multiple time zones. Their body clock's adjustment becomes just as important as their training. The way they adapt to new time zones can determine if they win or lose.
Sleep disruption from time zone changes
Athletes experience jet lag when they cross three or more time zones. Their internal body clock falls out of sync with local time [13]. This mismatch affects sleep quality and mental performance. More time zones mean worse symptoms. Eastward flights usually cause harder symptoms than westward trips.
Your body needs time to adjust. The rule of thumb is one day per time zone going east and half a day going west [13]. A flight from London to Tokyo crosses 8 time zones, so full adjustment takes more than a week. Elite cyclists showed worse sleep patterns in the first 48 hours after flying east - they slept less and their sleep quality dropped [28].
Pre-travel sleep banking
Extra sleep before travel helps reduce jet lag symptoms. Athletes who bank sleep by resting well before their trip handle the change better [29]. A study of athletes crossing 10 time zones showed that good pre-travel planning helped them adjust faster [9].
The timing of your flight makes a big difference. Athletes who flew during the day and got normal sleep at home felt better than those who took overnight flights [9]. The best approach is to pick flight times that leave the smallest gap between good sleep at home and your first full night's rest at your destination [29].
Adjusting schedules for optimal adaptation
Start shifting your sleep schedule 1-2 hours toward your destination's time a few days before leaving [30]. Light exposure plays a vital role once you arrive. Morning sun helps after westward flights, while evening light works better after flying east [14].
Keep naps short - about 20 minutes - instead of long ones that might keep you tied to your home time [30]. Eat meals based on your new local time since food timing affects your body clock [30]. Coaches should plan competition times around their athletes' body clocks. Morning events work better after westward travel, while afternoon or evening competitions give better results after flying east [14].
The coach’s role in promoting better sleep
Coaches play a vital role in helping athletes turn sleep knowledge into better habits. Their guidance helps athletes realize their full performance potential through better sleep practices.
Educating athletes on sleep and recovery
Coaches must make sleep science clear and simple for their athletes. They need to convert complex research into practical tips that show how sleep affects athletic performance. Team sessions with sleep experts help drive these concepts home effectively. Stories about elite athletes who make sleep a priority, like LeBron James's famous 12-hour sleep routine, strike a chord better than abstract facts.
Integrating sleep into training plans
Smart coaches plan training sessions to maximize sleep opportunities. They avoid scheduling intense workouts late in the evening and track sleep patterns along with other training metrics. Early planning for travel helps athletes adapt their sleep before major competitions. Recovery day protocols should measure sleep quality as a key recovery indicator.
Monitoring and supporting athlete sleep habits
Good sleep coaching needs the right amount of monitoring without making athletes anxious about their sleep. Basic sleep logs or proven questionnaires give enough useful data without adding complexity. Coaches should set clear sleep goals while staying flexible about each athlete's unique sleep requirements. Regular discussions about sleep quality during the season create accountability and show that coaches value this essential recovery tool.
Conclusion
Sleep is the ultimate performance multiplier for athletes at every level. This piece shows why top competitors need more sleep than average people and how good sleep improves their athletic abilities. Athletes who get 9-10 hours of quality sleep have better reaction time, decision-making, muscle repair, and hormonal balance. This maximizes the results of every training minute.
A coach's understanding of sleep's role goes beyond theory to real-life results. Basketball players shoot 9% better, swimmers react faster, and runners show better endurance. These results prove sleep's measurable effects. Poor sleep leads to slower reactions, bad decisions, higher injury risk, and worse emotional control.
Sleep quality matters just as much as quantity. Athletes should treat their bedroom setup, nighttime habits, and what they consume as carefully as their training plans. They need to pay special attention to travel plans because disrupted sleep patterns can waste weeks of preparation.
Smart coaches now lead this fundamental change in thinking about sleep. They see sleep as the foundation that supports all other training gains, not just time away from improvement. This change in point of view offers one of the most available ways to improve performance for today's athletes.
Sleep science shows a clear truth - athletes who become skilled at sleep recovery perform better than those who don't. Getting enough quality sleep can be hard with demanding athletic schedules, but it gives athletes an edge that training alone can't match. Sleep isn't just rest - it's an active investment in athletic excellence and maybe the most valuable one an athlete can make.
Key Takeaways
Elite athletes require significantly more sleep than the general population to optimize performance, recovery, and competitive advantage.
• Elite athletes need 9-10 hours of sleep nightly, not the standard 7-8 hours recommended for adults, to support intensive training demands and recovery processes.
• Sleep extension directly improves performance metrics - basketball players shooting 9% better and swimmers with faster reaction times after increasing sleep to 10 hours nightly.
• Sleep deprivation creates cascading performance deficits including 7-10% slower reaction times, 1.7x higher injury risk, and compromised decision-making abilities.
• Sleep quality matters as much as quantity - athletes often experience lower sleep efficiency despite adequate time in bed, requiring attention to sleep hygiene and environment.
• Strategic napping (20-30 minutes) between 1-4 PM can supplement nighttime sleep and improve afternoon training performance when full sleep isn't achievable.
• Coaches must integrate sleep monitoring into training plans and educate athletes that sleep is a performance tool, not a luxury, treating it with equal importance as training and nutrition.
Sleep represents the most accessible yet underutilized performance enhancement available to athletes. While obtaining 9-10 hours of quality sleep presents scheduling challenges, the measurable gains in reaction time, accuracy, recovery, and injury prevention make sleep optimization a competitive necessity rather than an optional recovery method.
References
[1] - https://www.sportsmith.co/articles/options-for-sleep-monitoring-and-wearables/[2] - https://pmc.ncbi.nlm.nih.gov/articles/PMC10666701/[3] - https://pubmed.ncbi.nlm.nih.gov/34554425/[4] - https://pmc.ncbi.nlm.nih.gov/articles/PMC3119836/[5] - https://www.sciencedirect.com/science/article/pii/S2666991924000484[6] - https://www.sleepfoundation.org/physical-activity/athletic-performance-and-sleep[7] - https://www.scienceforsport.com/caffeine-and-sleep-relationship/?srsltid=AfmBOopUvZXKdYz54oO9P26M5kAq26NVYee_gSBquVFvYEiXFe4gm7-i[8] - https://www.gssiweb.org/sports-science-exchange/article/sse-113-sleep-and-the-elite-athlete[9] - http://humankinetics.me/2019/05/29/7-hacks-that-help-athletes-overcome-jet-lag-with-examples/[10] - https://www.mayoclinichealthsystem.org/hometown-health/speaking-of-health/sleep-and-athletic-performance[11] - https://pubmed.ncbi.nlm.nih.gov/34021090/[12] - https://www.truesportsphysicaltherapy.com/blogs/sleep-optimization-for-athletic-recovery-beyond-just-getting-8-hours[13] - https://pmc.ncbi.nlm.nih.gov/articles/PMC6988893/[14] - https://bjsm.bmj.com/content/55/7/356[15] - https://www.dovepress.com/to-nap-or-not-to-nap-a-systematic-review-evaluating-napping-behavior-i-peer-reviewed-fulltext-article-NSS[16] - https://academic.oup.com/sleep/article/46/12/zsad133/7157067[17] - https://www.frontiersin.org/journals/sports-and-active-living/articles/10.3389/fspor.2022.906663/full[18] - https://pmc.ncbi.nlm.nih.gov/articles/PMC9960533/[19] - https://www.cases.org.uk/imgs/9947_bas_bases_tses___summer_2023___online_final___expert_statement22.pdf[20] - https://pmc.ncbi.nlm.nih.gov/articles/PMC9861232/[21] - https://www.firstbeat.com/en/blog/measuring-sleep-to-help-manage-athletic-performance/[22] - https://trainright.com/sleep-athletes-optimize-sleep-improve-performance/[23] - https://puresportsmed.com/blog/posts/sleep-the-ultimate-performance-enhancer/[24] - https://fatiguescience.com/blog/10-sleep-strategies-for-peak-athletic-performance[25] - https://newatlas.com/fitness/evening-exercise-sleep/[26] - https://pmc.ncbi.nlm.nih.gov/articles/PMC12000559/[27] - https://www.advisory.com/daily-briefing/2025/05/22/exercise-bedtime[28] - https://www.sciencedirect.com/science/article/pii/S2451994423000147[29] - https://pmc.ncbi.nlm.nih.gov/articles/PMC8279034/[30] - https://pmc.ncbi.nlm.nih.gov/articles/PMC3435929/
