Why a healthy sleep cycle is key to brain, hormone, and immune health

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Quality sleep helps restore the body, balance hormones, and strengthen immunity — essential for long-term well-being. (Image: Pexels)

The average sleep cycle consists of two phases that alternate with each other, the non-rapid eye movement (NREM) phase, and rapid eye movement (REM) phase. This pattern allows the body to rest and restore its function, and enhances the cognitive functions. It also positively influences the hormone balance.

A well-maintained sleep cycle contributes to recovery by reducing the activity of the neurons as well as reducing the metabolic demand of the body. This aids in conserving energy and restoring the neural networks.

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During NREM and REM cycles, learning and memory function is enhances. NREM contributes by strengthening the factual memory, and REM makes the emotional and creative process in the brain more efficient. A disturbed sleep can disrupt this, thus leading to impairment of retention and attention, along with learning. Hence, it is crucial for students and professionals performing cognitive tasks to have adequate sleep.

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REM influences the emotional circuits, and poor sleep can hinder this process. Inadequate sleep can lead to increased anxiety levels and heightens irritability. The person becomes emotionally more reactive, and long-term deprivation of sleep can enhance the risk of depression and anxiety disorders. A healthy sleep cycle promotes calmness and improves coping mechanisms.

The endocrine system synchronises the secretion of various hormones depending upon the regularity of the sleep cycle. The levels of growth hormone increase during deep sleep, and the levels of cortisol decline at night. Sleep disturbances may result in stress-hormone dysregulation and thyroid hormone imbalance.

The immunity and repair processes of the body are active while sleeping, and healing is enhanced. Chronic loss of adequate sleep can weaken the defences and immunity, thus predisposing the person to infections. Long-term immune health can be ,so stoned with good sleeping patterns.

Stable sleep cycles are necessary for long-term mental health and well-being. Avoiding alcohol or caffeine at night can help in regulating sleep cycles. One must avoid looking at one’s screens like phones or laptops before sleeping. A daily routine that includes exercises and yoga can also be helpful.

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Also Read: Sleeping for less than 6 hours every night? Doctors have a warning that you must not ignore

FAQs on How Healthy Sleep Shapes Your Day:

1. How does sleep impact cognitive functions?

Adequate sleep enhances cognitive abilities, including learning and memory. NREM sleep strengthens factual memory, while REM sleep improves emotional and creative processes.

2. Can poor sleep affect emotional health?

Yes, poor sleep can increase anxiety, irritability, and emotional reactivity. Long-term sleep deprivation can raise the risk of depression and anxiety disorders.

3. How does sleep influence hormone balance?

The endocrine system synchronises hormone secretion based on sleep patterns. Deep sleep increases growth hormone levels, while cortisol levels decline at night. Sleep disturbances may lead to hormone imbalances.

4. What role does sleep play in immunity?

Sleep activates the body’s immunity and repair processes, enhancing healing. Chronic sleep loss can weaken immune defences, making one more susceptible to infections.

5. What can I do to maintain a healthy sleep cycle?

Avoid alcohol or caffeine at night, refrain from using screens before bed, and incorporate daily exercises and yoga into your routine to help regulate sleep cycles.

Disclaimer: This article, including health and fitness advice, only provides generic information. Don’t treat it as a substitute for qualified medical opinion. Always consult a specialist for specific health diagnosis.