Most athletes need between 8 and 10 hours of sleep per night, which is more than the 7 to 9 hours recommended for the general adult population. Some sports scientists recommend competitive athletes aim for 9 to 10 hours of nighttime sleep to ensure adequate recovery, or roughly 8 hours and 50 minutes at minimum to feel rested. The exact number depends on your training load, sport type, and age.
Why Athletes Need More Than Average
A 2021 expert consensus published in the British Journal of Sports Medicine concluded that a one-size-fits-all recommendation is unlikely to work for athletes. Instead, sleep needs should be individualized based on training demands, sport, and the athlete’s own perceived needs. That said, the experts agreed that athletes generally need more sleep than non-athletes to recover from the physical and psychological demands of their sport, and that sleep needs increase as training load goes up.
Teenagers who play sports have even higher requirements. The recommended range for adolescent athletes is 8 to 10 hours, with many likely benefiting from the upper end of that range during heavy training periods.
What Happens During Deep Sleep
The reason athletes need extra sleep comes down to what the body does during its deepest sleep stage. During deep sleep, the brain produces slow, synchronized electrical waves that trigger a cascade of physical repair. Growth hormone, testosterone, and other recovery-related hormones surge during this phase, driving muscle repair, protein building, and the replenishment of energy stores in your muscles.
When you cut sleep short, you lose a disproportionate amount of this deep sleep, since the body concentrates it in the later hours of the night. That disrupts growth hormone release and raises levels of the stress hormone cortisol. Elevated cortisol accelerates protein breakdown, which is the opposite of what you want after a hard training session. Sleep deprivation also increases inflammatory molecules that can interfere with the process of building new muscle fibers at a cellular level.
Effects on Reaction Time and Decision Making
Sleep loss doesn’t just slow physical recovery. It measurably impairs the cognitive skills that separate good athletic performances from bad ones. Attention and reaction time decline with even modest sleep restriction, and a single night of complete sleep loss is enough to produce noticeably slower reaction times.
Perhaps more importantly, sleep deprivation weakens inhibitory control, which is your ability to override a risky or impulsive decision in a split second. In a game situation, that might mean committing to a bad tackle, swinging at a pitch outside the zone, or making a reckless pass. The mental sharpness that allows athletes to adapt on the fly is one of the first things to deteriorate when sleep falls short.
Injury Risk Below 7 Hours
Sleeping 7 hours or less per night is consistently linked to a higher risk of musculoskeletal injury. When athletes sustain that pattern for at least two weeks, they face 1.7 times the risk of injury compared to athletes who sleep more. That’s a 70% increase in injury risk from a habit many athletes don’t even recognize as a problem.
This matters especially during preseason training camps, tournament schedules, and other periods when athletes push their bodies hardest while often sleeping the least. The combination of high training volume and chronic short sleep creates a compounding effect on injury vulnerability.
Endurance vs. Power Sports
The type of training you do appears to shape how much sleep your body seeks out. Research comparing endurance athletes, power athletes, and non-athletes found meaningful differences in sleep patterns. Endurance-trained athletes spent more time in deep sleep, slept longer overall, and fell asleep faster than power-trained athletes. Athletes who trained in a mix of both fell somewhere in between.
This suggests that aerobic training creates a stronger physiological drive for deep, restorative sleep. If you’re a distance runner, swimmer, or cyclist logging heavy training volume, your body may genuinely need more sleep than someone focused on short bursts of explosive work like sprinting or weightlifting. That doesn’t mean power athletes can get by on less; it means endurance athletes may find their bodies demanding even more.
How Naps Fit In
Daytime naps can partially compensate for nighttime sleep that falls short, and most research suggests longer naps outperform shorter ones for athletes. Naps lasting 35 to 90 minutes appear to provide greater performance benefits than the commonly recommended 20-to-30-minute power nap. The key variable is how much time passes between waking from the nap and competing or training. A longer buffer gives your body time to shake off grogginess.
Naps work best as a supplement to adequate nighttime sleep, not a replacement. If you’re consistently sleeping under 7 hours at night and relying on naps to make up the difference, the recovery quality won’t be the same as getting a full night of consolidated sleep with its natural progression through deep and lighter sleep stages.
Sleep During Travel and Competition
Elite athletes are particularly susceptible to poor sleep, and travel is one of the biggest reasons. Professional teams in the NBA, NHL, MLB, and NFL travel between 40,000 and 80,000 kilometers per season. That’s the equivalent of circling the globe one to two times, often on schedules that include back-to-back games in different cities.
Sports medicine experts distinguish between two types of travel-related sleep disruption. Travel fatigue is the general exhaustion from long flights, disrupted routines, and uncomfortable sleeping conditions. Jet lag is the deeper biological problem of your internal clock being out of sync with local time. Each requires a different approach.
For travel fatigue, the priority is maximizing sleep during the trip itself and being well-rested before departing. A “sleep banking” strategy, where you deliberately extend sleep in the days before travel, can build a buffer against the inevitable disruption. For jet lag, the most effective tools are timed light exposure (seeking or avoiding bright light during specific three-hour windows), adjusting meal timing to the new time zone, and exercising during daylight hours at your destination. Planning hydration and meals during travel also helps reduce the general fatigue that compounds sleep problems.
Signs You’re Not Getting Enough
Many athletes underestimate how much sleep they actually need because they’ve adapted to functioning on less. Some signs that your sleep is falling short include needing an alarm clock to wake up every morning, feeling drowsy during afternoon training, taking longer than usual to recover between sessions, or noticing that your motivation and mood have dipped without an obvious cause. Performance plateaus that don’t respond to changes in training volume can also point to a sleep deficit.
If you’re currently sleeping around 7 hours, try extending to 9 hours for two to three weeks and tracking how your performance and recovery feel. The difference is often more dramatic than athletes expect, particularly in sports requiring sustained concentration, quick reactions, or heavy physical loads.