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Without sleep, we cannot survive – in mind or body. Sleep is the body’s nightly maintenance, giving the brain and immune system a chance to regroup for the next battle for health. But the newly developed lifestyle is making us lose sleep without understanding its long term effects.
Late-night screen exposure, artificial lights, caffeine consumption and chronic stress are training your brain to delay sleep — the way most of us do as we age. In fact, the body begins to pay the “silent” price long before symptoms become apparent.
danger of lack of sleep
Dr. Srinivas Rajkumar T, MD (AIIMS, New Delhi) – Senior Consultant Psychiatrist, Apollo Clinic, clarifies that “Sleep is not a pass-time but a neurobiological state of restoration and emotional processing.”
During deep non-rapid eye movement (NREM) sleep, the body repairs tissues, resets hormones and strengthens immunity. REM sleep strengthens memory and regulates emotions. When these are disrupted, the work of biological maintenance remains incomplete; We look fine on the outside while our internal systems begin to fail.
How does metabolism get derailed?
In adults, when we regularly sleep less than six hours, our hunger hormones go haywire: ghrelin (which increases appetite) increases, and leptin (which signals fullness) decreases.
Cravings for foods high in sugar and fat increase – especially at night – and make you more likely to gain weight. Just one night of inadequate sleep can reduce the body’s ability to regulate blood sugar by 20-25%, effectively pushing the system in a direction that leads to becoming prediabetic.
When sleep is reduced, cortisol levels peak in the evening, leading to more fat accumulation and difficulty losing weight.
Immune system silently weakens
Deep sleep is one of the most powerful regulators of immune activity. When you reduce deep sleep, the body’s natural killer (NK) cells – the main defense against viruses and early cancer – are depleted. At the same time, inflammatory markers such as IL-6 and CRP increase, while antibody production decreases. This means you get sick more often, take longer to recover, and suffer from persistent low-grade inflammation. Over time, chronic inflammation substantially increases the risk of diabetes, heart disease, and autoimmunity.
Mood, stress and mental health deteriorate
Sleep is the brain’s pillow, a soft landing pad for difficult and painful experiences. Without an adequate supply of the connectivity that keeps the amygdala – our brain’s stress and fear center – in check, the amygdala becomes overactive. At the same time, our prefrontal cortex, part of the organ’s emotional-control network, loses its raw horsepower. the final result is Irritability, nervousness, emotional sensitivity and dull focus,
Discontinuous REM sleep does not allow for emotional reprocessing, and undigested stress spills over into the next day. Chronic sleep loss increases depression and anxiety, exacerbates OCD or bipolar symptoms, and causes emotional dysregulation in attention deficit hyperactivity disorder (ADHD).
Your heart also pays its price
Quality sleep resets the cardiovascular system, as blood pressure decreases, the heartbeat slows and blood vessels relax. When this reset is missing, cardiovascular stress increases. According to large studies, people who typically sleep less than five hours a night are 30 to 40% more likely to have heart disease or stroke. If sleep apnea is a factor, repeated drops in oxygen during the night can aggravate long-term heart injury.
Warning signs that the body provides
It’s not always obvious how tired you are when you’re sleep-deprived. Initial clues include:
- Late night cravings or snacking
- frequent colds or slow recovery
- Brain fog: Forgetting that you left your keys where they belong, or tiredness from the day
- mood changes, irritability or anxiety
- I am tired but can’t sleep. don’t sleep easily
- increased resting heart rate or blood pressure
- morning headache or persistent drowsiness
These symptoms may occur months – and sometimes years – before they develop into a serious health problem.
Small habits that will help you sleep well at night
Fixing sleep isn’t about radical practices. What matters is continuity:
- Keep the same sleeping and waking times
- Get 10-20 minutes of sunlight early in the morning
- No screens and no bright lights 1-2 hours before bed
- Limit caffeine intake after noon
- Maintain a cool, dark, and quiet environment for sleeping
- Exercise regularly, but not right before bed
Supplements like melatonin or magnesium glycinate may provide short-term relief, but they can’t address faulty sleep habits that have gone out of control.
Chronic insomnia, loud snoring, gasping during sleep, or excessive daytime drowsiness should be medically evaluated and may require a sleep study.
,Author Nivedita is a freelance writer. She writes on health and travel.)
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