The part of sleep that heals the body is primarily Deep Sleep (Stage 3 Non-REM), where the body releases growth hormones for tissue repair, increases blood flow to muscles for recovery, strengthens the immune system by producing infection-fighting cytokines, restores energy, and regulates blood sugar, allowing for essential physical restoration and cell regeneration.
The first few hours of sleep are the deepest, he said. It's during this time that the body performs tissue growth and repair, allowing healing and restoration to occur. It's also the time when the brain clears away stuff it doesn't need, making room for the stuff it does need.
In stage 3, your brain waves are slow but strong. Your body takes advantage of this very deep sleep stage to repair injuries and reinforce your immune system. The same bursts of brain activity that happen in stage 2 can also happen in stage 3, and brain waves specific to stage 3 help regulate those bursts.
Deep Sleep (Non-REM Stage 3 Sleep)
This is the most restorative stage of sleep and crucial for physical recovery and growth. During deep sleep, the body repairs tissues, builds bone and muscle, and strengthens the immune system.
Try to get 7-8 hours of sleep each night, sleeping as much as possible before midnight. Your body repairs itself best between 10 p.m. and 2 a.m. If you have trouble relaxing or falling asleep: Go to bed only when you feel sleepy.
1-3am is the time of the Liver and a time when the body should be alseep. During this time, toxins are released from the body and fresh new blood is made.
The 3-2-1 bedtime method is a simple sleep hygiene strategy: stop eating 3 hours before bed, stop working 2 hours before bed, and stop using screens (phones, tablets, TVs) 1 hour before sleep, helping your body transition to rest by reducing stimulants and digestive load for better sleep quality. A more detailed version adds 10 hours (no caffeine) and 0 (no snoozing) for a 10-3-2-1-0 rule.
To find your ideal sleep schedule, think about what time you go to bed and wake up on the days you feel refreshed and energetic. Most adults should aim for seven to eight hours of sleep each night. During the day, you should feel well-rested and able to function well, not sleepy or groggy.
Stage 3. This is the deep sleep stage. It's harder to rouse you during this stage, and if someone woke you up, you would feel disoriented for a few minutes. In adults, stage 3 makes up about 25% of total sleep time.
Best Foods for Sleep
Reductions in the duration of slow wave sleep were observed for all 3 caffeine conditions, but reached significance only for administration at bedtime and 6 h before bedtime. As expected, caffeine had no effect on REM sleep for any time of administration.
To get an idea of what it takes for muscles to get repaired, you have to break down the sleep cycle. During a typical night, you experience five or six sleep cycles wherein you enter all five sleep stages. Muscle repair and recovery takes place during stage 3, the first of the deep sleep stages.
The koala is the animal that sleeps approximately 90% of the day (20-22 hours), a necessity due to its low-energy eucalyptus diet requiring intensive digestion, making it the ultimate champion of sleep in the animal kingdom, followed closely by sloths and bats.
The third and fourth stages are deep sleep. Though REM sleep was previously believed to be the most important sleep phase for learning and memory, newer data suggests that non-REM sleep is more important for these tasks, as well as being the more restful and restorative phase of sleep.
Sleeping well can work directly to keep inflammation in check by avoiding the pro-inflammatory activity that occurs in the presence of poor, dysregulated sleep. And sleep offers us significant protection against stress, itself a major contributor to chronic inflammation—a now known pathway to disease.
The unhealthiest sleeping position is generally considered to be sleeping on your stomach (prone position), as it forces your neck to twist and flattens the natural curve of your spine, leading to neck, back, and shoulder pain, numbness, and poor sleep quality. An overly curled fetal position is also harmful, causing joint stiffness and restricted breathing, while sleeping on your back can worsen snoring and sleep apnea for some individuals.
The idea is that you'll have gradually increasing wake times between naps, with two hours before the first, three hours after that, and four hours just before bedtime. It's designed for babies who can do with just two naps a day, a stage that usually occurs between six and 18 months old.
The "3-2-1 Bedroom Method" (or a variation like the 10-3-2-1 rule) is a sleep hygiene strategy to improve rest by staggering when you stop certain activities before bed: stop heavy food/alcohol 3 hours before, stop work/mental stress 2 hours before, and turn off screens (phones, TVs, computers) 1 hour before sleep, creating a better wind-down for your body.
10 hours before bed: No more caffeine. 3 hours before bed: No more food or alcohol. 2 hours before bed: No more work. 1 hour before bed: No more screen time (shut off all phones, TVs and computers).
Own Your 3-Foot Space In Navy SEAL training, there's a simple but profound principle: Own your 3-foot space. It means focusing on what's directly within your control—your actions, your attitude, your effort—no matter how chaotic the environment around you becomes.
A prime example is the box breathing technique, famously used by the Navy Seals, known as the 4-4-4-4 method. This simple yet effective method involves a cycle of inhaling for 4 seconds, holding the breath for 4 seconds, exhaling for 4 seconds, and then pausing for 4 seconds before the next inhalation.
In his piece, he revealed that through his years of research, he's found that rumination is the biggest thing that causes poor sleep. He says that being worried about something at night has affected his own ability to fall asleep.
The 80/20 Rule means that you stick to your healthy, consistent sleep schedule 80% of the time. You then can make exceptions to your schedule 20% of the time. The 80/20 Rule allows you to “live life” and enjoy those special moments with your family.
Signs of poor core sleep (deep, restorative sleep) include waking up foggy, daytime fatigue/energy crashes, poor concentration, irritability, frequent illness, memory issues, and mood swings, indicating your brain and body aren't fully repairing and consolidating memories. You might also experience increased sugar cravings, slow muscle recovery, and a weakened immune system.