Rise and Shine from High Quality Sleep

Adolescents often struggle with getting enough sleep. The average amount of sleep that teenagers get is between 7 and 7 ¼ hours per night, which is below the recommended 8-10 hours. Sleep deficiency tends to worsen with grade level. According to the CDC data, 71% of high school students reported insufficient sleep in 2021, with the highest rates among female students (80%) and 12th graders (84%). While increased academic and extracurricular demands can interfere with youth’s sleep, sleep difficulties can also be attributed to other factors such as poor sleeping habits, technology use, shifting schedules, and stress.

Adolescence is a particularly important period of neural development.  Sleep has a profound impact on the development of brain functions and structures.  Research has shown that sleep disturbances during adolescence can persist into adulthood. Addressing sleep problems early and promoting healthy sleep habits are crucial for ensuring long-term health and well-being.

How do we sleep?

When we think of sleep, it might seem like we simply fall asleep in the evening and wake up in the morning. In reality, our sleep is composed of several cycles, each lasting about 90 minutes. A typical night includes four to six cycles, with each cycle transitioning through different stages of sleep, categorized into Non-Rapid Eye Movement (NREM) and Rapid Eye Movement (REM) sleep.

NREM sleep consists of three stages ranging from light to deep sleep:

Stage 1, or N1 sleep, is the transition from wakefulness to sleep. This is the lightest stage of sleep, occurring right after you fall asleep and lasting for a few minutes. During this stage, brain activity begins to slow down, and muscle activity decreases. Eye movements are slow. N1 sleep is a transitional phase that helps the body relax and prepare for deeper sleep stages.

Stage 2, or N2 sleep, is a stage of light sleep that forms the largest portion of the sleep cycle. During this stage, brain waves slow down further, body temperature drops, and heart rate slows. Eye movements stop. N2 sleep is essential for processing memories and maintaining cognitive functions.

Stage 3, or N3 sleep, is a stage of deep sleep. During this stage, brain waves are at their slowest. Muscle activity is very limited, and it is difficult to wake someone from this stage. Deep sleep is critical for physical restoration, including tissue growth and repair. It supports immune function and the release of growth hormones. This stage is essential for feeling refreshed and energized the next day.

REM sleep is characterized by rapid eye movements and increased brain activity. This stage is often referred to as the "dreaming stage" because it is during this phase that the most vivid and memorable dreams occur.

It's common to wake up briefly at the end of each sleep cycle. These awakenings often go unnoticed because they are usually very brief, and we typically fall back asleep quickly. Knowing that brief awakenings are a normal part of the sleep cycle can reduce anxiety about waking up during the night.

Why do people sleep?

Sleep is not just about reducing sleepiness. It is a fundamental biological need, similar to eating and breathing. It serves several vital functions for our bodies and brains.

Physical impact. In adolescents, sleep is crucial for growth and development. Growth hormone, which is essential for physical development, is primarily secreted during deep sleep. Sleep strengthens the immune system, making it easier for the body to fight off infections and illnesses.

Cognitive performance. Sleep helps consolidate memories and enhances learning. During sleep, particularly during REM sleep, the brain processes and stores information from the day, making it easier to recall and use later. Sufficient sleep also improves concentration and attention. Sleep-deprived individuals often struggle with focus, making tasks that require sustained attention more difficult. Research has shown that sleep consistency—being awake or asleep at about the same time each day—is positively related to high school GPA.

Behavioral and social impact. It's almost common sense that we become grumpy when we don’t sleep enough. Getting good sleep helps keep our mood stable and prevents mood disorders. Not getting enough sleep can increase the risk of depression, anxiety, and irritability. The brain energy we use during the day gets replenished during sleep. When we lack sleep, we feel exhausted and have difficulty controlling our emotions, which affects our relationships with others.

Tips for getting better sleep

Maintaining good sleep hygiene is essential for getting enough quality sleep. Here are some practical tips to help improve our sleep habits:

Keeping a consistent sleep schedule. It is likely the most effective way to achieve high-quality sleep. Go to bed and wake up at the same time every day. Establishing a routine helps regulate our body's internal clock, making it easier to fall asleep and wake up naturally. Some may believe they can catch up on sleep during the weekend to make up for lack of sleep during weekdays, but this method does not work well. Maintaining a consistent schedule is more beneficial for our overall sleep quality.

Limit screen time before bed. Reducing screen time before bedtime is crucial for better sleep. The blue light emitted by phones, tablets, and computers can interfere with the production of melatonin, a hormone that regulates sleep. If you must use your devices, switch them to night mode to reduce blue light exposure. Ideally, the bedroom should be kept quiet, dark, cool, and comfortable to encourage sleep.

Be mindful of your diet. Avoid caffeine and large meals before bedtime. Caffeine can stay in your system for hours and disrupt your sleep, while heavy meals can cause discomfort and indigestion. If you're hungry, opt for a light snack to prevent hunger from waking you up, but avoid anything too heavy.

Manage stress and anxiety. Worry and anxiety trigger the release of stress hormones such as cortisol. Elevated cortisol levels can interfere with the production of melatonin, the hormone responsible for regulating sleep-wake cycles. High cortisol levels make it harder to fall asleep and stay asleep. To improve your sleep, practice stress-reduction techniques. Writing down your worries before bed can help clear your mind. Techniques such as meditation, yoga, and progressive muscle relaxation can also help reduce stress and anxiety.

Stay physically active. Exercise during the day can help you fall asleep faster and enjoy deeper sleep. Physical activity triggers the release of endorphins, the body's natural stress-relievers, which help create a more relaxed state conducive to sleep. However, try to finish exercising at least a few hours before bedtime to avoid being too energized to sleep​.

By following these tips, you can improve your sleep hygiene and ensure you get the rest you need to stay healthy, focused, and energetic. Remember, good sleep is a crucial part of overall well-being, especially during adolescence when your body and mind are growing and developing.