What Is Sleep?

Sleep corresponds to a reduction in the state of consciousness that separates two periods of wakefulness. It is characterized by reduced alertness, decreased muscle tone, and partial preservation of sensory perception.

Sleep is a crucial function for our health because we spend nearly one third of our lives sleeping. It is now well established that sleep is essential for many biological functions. However, sleep disorders — affecting a large portion of the population — have increased significantly in recent decades. This deterioration raises concerns about the future evolution of our overall health.

• A good night’s sleep consists of at least 3 to 5 sleep cycles of approximately 90 minutes each
• In France, 1 person out of 3 suffers from sleep disorders
• Poor sleep increases the risk of cardiovascular diseases, obesity, diabetes, cancer, and accidents

The Different Types of Sleep

Sleep consists of a succession of 3 to 6 cycles lasting between 60 and 120 minutes each. Each cycle alternates between slow-wave sleep and REM sleep, both corresponding to different brain activities.

Slow-wave sleep is named after the slow brain waves that characterize it. It includes several stages: after a short transition phase separating wakefulness from sleep, light sleep begins. This is followed by progressively deeper sleep lasting several dozen minutes.

During this phase, oxygen consumption decreases and brain metabolism slows down. Muscle tone is also reduced, although still partially present, which may explain episodes of sleepwalking.

REM sleep corresponds to a phase during which brain activity is close to that of wakefulness.
In contrast, muscle tone is almost absent during this phase, except for small movements of the extremities. Blood pressure and breathing rhythms fluctuate as well.

Sleep rhythm first varies throughout the same night: the first cycles mainly consist of deep slow-wave sleep, while the end of the night is dominated by REM sleep. If you slept poorly the previous night, slow-wave sleep will generally be deeper the following night.

Sleep also changes throughout life: slow-wave sleep is deeper during childhood and adolescence, up to around the age of 20. As we age, it gradually decreases and becomes lighter, which explains the increase in sleep disorders with aging. Conversely, REM sleep is longer during early childhood and shortens in adulthood.

Sleep Is Health

Sleep is the best form of rest and is just as important for health as food and physical exercise. Yet our metabolism does not remain inactive during sleep.

Deep sleep is the moment when the body produces essential hormones, including growth hormone responsible for children’s growth.

It is also during the night that the skin repairs itself: epidermal cell division reaches its maximum around 1 a.m. Bone renewal also occurs largely during sleep, while various hormones help trigger tissue repair and muscle formation.

Sleep therefore allows the body to recover both physically and mentally by reducing metabolism and lowering body temperature. During sleep, the body eliminates daily stress, regenerates neural connections in the brain, consolidates memory, and promotes learning.

Over time, researchers discovered that sleep is not only useful for memory and recovery, but also essential for overall health. Studies on people suffering from sleep disorders have shown that poor sleep quality or insufficient sleep increases the risk of irritability, depressive symptoms, weight gain, hypertension, and infections.

Sleep Disorders

Sleep-related disorders include both specific sleep rhythm disorders and conditions that occur during sleep, such as:

Insomnia: Several types of insomnia exist. Some involve difficulty falling asleep, others frequent nighttime awakenings, or a feeling of non-restorative sleep.

Hypersomnia and Narcolepsy: Hypersomnia is characterized by an excessive need for sleep and episodes of excessive daytime sleepiness despite normal or extended sleep duration.

Parasomnias: The most common parasomnias include sleepwalking, bruxism (teeth grinding), sleep talking, night terrors, and enuresis (bedwetting).

Obstructive Sleep Apnea: Sleep apnea is a respiratory disorder whose frequency increases with age, overweight, and obesity.

Restless Legs Syndrome: Also called Willis-Ekbom disease, it is characterized by an irresistible urge to move the legs, often associated with unpleasant sensations in the lower limbs.

Circadian Rhythm Disorders: These disorders occur when the biological clock becomes disrupted. People with delayed sleep phase syndrome cannot fall asleep before very late hours, while those with advanced sleep phase syndrome struggle to stay awake after 7 p.m.

Improving Sleep Quality

Cytamphology is a range of treatments designed to strengthen the body’s defenses through natural and biological means, helping improve overall health and especially sleep quality.

Among the products in our range, we recommend:

001: For better sleep quality (helps support the different sleep cycles: light, deep, and REM sleep)

013: Helps support adrenal gland balance, which may influence difficulty falling asleep

096: Helps reduce sleep apnea by acting on airway obstruction in the throat area

180: Helps reduce factors associated with narcolepsy

216: Helps highly sensitive individuals achieve relaxation and emotional release

102: Supports mental recovery

709: Helps promote physical recovery

All these products form a basic program related to sleep disorders. For a personalized program tailored as closely as possible to your needs, we remain at your disposal.