This is what happens to the body when you sleep for 7 hours vs. 9 hours

 

Most of us love dodging sleep, while many of us struggle with deep sleep. As a result, many individuals fail to meet the recommended sleep criterion of eight hours. Recent research studies, including those published in PubMed, suggest that it is advisable not to exceed seven to nine hours of sleep. So, what is better -- sleeping for 7 or 9 hours? Let's find out from experts.

"The ideal sleep duration for most adults falls within a sweet spot of 7 to 9 hours per night. This range helps ensure optimal rest, supports memory consolidation, and promotes physical recovery. Rather than choosing between 7 or 9 hours, the focus should be on discovering what works best for your body within this window. Everyone's sleep needs are slightly different, so personalising your routine is key to feeling well-rested and energised," said Dr Narander Singla, lead consultant, internal medicine, CK Birla Hospital, Delhi.

Several factors influence the amount of sleep you need. Dr Singla explained that age plays a significant role. Older adults (65 years and above) may require slightly less sleep, approximately 7–8 hours, whereas younger adults typically do best with 7–9 hours of sleep. "Additionally, individual variation matters: while some people can function perfectly with 7 hours of rest, others need a full 9 to feel their best. It’s also important to remember that sleep quality is just as critical as sleep quantity. Nighttime disruptions, high stress levels, or an uncomfortable sleep environment can all negatively affect how refreshed you feel the next day, even if you sleep for the recommended duration," said Dr Singla.

For one, it supports your physical health, including immune function and weight management. "It also enhances mental well-being, helping with cognitive performance, focus, memory, and emotional regulation. Whether you're an athlete, a student, or working a demanding job, getting enough sleep can significantly improve your daily performance and energy levels," said Dr Singla.While an extra two hours of sleep might just feel like a luxurious weekend sleep-in, your brain and body treat the difference between a 7-hour and a 9-hour sleep cycle as two entirely distinct operational states.

A standard sleep cycle takes roughly 90 minutes to move through light sleep, deep sleep, and REM (Rapid Eye Movement) sleep. Getting 7 hours gives you roughly 4.5 cycles, while 9 hours allows for a full 6 cycles.

Here is exactly what happens under the hood when you clock 7 hours versus 9 hours of rest.

The Head-to-Head Comparison

Bodily Function	7 Hours of Sleep	9 Hours of Sleep
Brain Maintenance & Memory	The brain completes its basic "glymphatic clearing" (washing away cellular waste), but misses out on the final, prolonged REM cycles where emotional processing and complex problem-solving are fully cemented.	Allows the brain to experience its longest, deepest REM cycles, which occur predominantly in the early morning hours. This drastically improves creative thinking and mental sharpness.
Metabolism & Hunger Control	Ghrelin (the hunger hormone) can slightly elevate, while leptin (the fullness hormone) drops. You are more likely to experience minor mid-afternoon cravings for quick energy (carbs and sugars).	Hormones regulate perfectly. You wake up with stabilized blood sugar levels and a more predictable, controlled appetite throughout the day.
Physical Repair & Immunity	You get enough deep sleep for standard muscle tissue repair, but systemic inflammation markers (like C-reactive protein) remain slightly higher than they would with a longer rest.	Maximizes the release of Human Growth Hormone (HGH) and cytokines (proteins that fight infection), optimizing muscle recovery and strengthening the immune defense system.
Cardiovascular Health	Your blood pressure drops during sleep (known as "dipping"), which is healthy, but 7 hours provides a shorter window of cardiac rest.	Gives the heart and blood vessels a prolonged period of reduced workload, which clinical studies link to lower long-term cortisol (stress hormone) levels.

Which One is Actually Better?

The sweet spot isn't identical for everyone, but sleep science offers a clear rule of thumb:

• 7 Hours is the "Survival Sweet Spot": For the majority of healthy adults, 7 hours is the baseline minimum required to maintain cognitive function and avoid the chronic, long-term health risks associated with true sleep deprivation (less than 6 hours).

  
  
  

• 9 Hours is the "Athletic & Recovery Premium": Nine hours is highly beneficial if you have had an intense physical workout, are recovering from an illness, or are dealing with heavy cognitive stress. It prioritizes tissue repair and deep mental restoration.

  
  
  

The "Too Much" Warning: Regularly sleeping more than 9 hours without an obvious reason (like intense fatigue or illness) can sometimes leave you feeling groggy—a phenomenon known as "sleep drunkenness" (hypersomnia). If you consistently need more than 9 hours to feel functional, it's often a sign of poor sleep quality rather than quantity.

Getting only 6 to 7 hours occasionally might not harm you, but doing it regularly can affect your focus, mood, and immunity. "On the other hand, oversleeping beyond 9 hours consistently may also be a sign of an underlying health issue like depression or thyroid problems," said Dr Manjusha Agarwal, senior consultant, internal medicine, Gleneagles Hospital Parel Mumbai.

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Fortis Delhi gastroenterologist explains you need to eat anjeer daily, shares how to consume and when for most benefits

 

While popular superfoods often dominate the health conversation, a doctor is shining a spotlight on a humble fruit: anjeer (figs). In a video shared via Instagram on March 25, Dr Shubham Vatsya, a senior gastroenterologist and hepatologist at Fortis Hospital, Vasant Kunj, Delhi, urged people to reconsider the nutritional value of this fruit.

A dual-action digestive aid

Dr Vatsya categorised fig as a powerhouse for digestive and cardiovascular health that often gets overlooked in modern diets. The primary benefit of figs lie in their unique fibre composition. Unlike many fruits that favour one type of fibre, figs offer a balanced 'one-two punch' for gut health, he shared.

Dr Vatsya explained in his video in Hindi: “Figs do not receive as much credit as they deserve because they are rich in both soluble and insoluble fibre, which softens stool. This makes bowel movements smooth and naturally helps with constipation.”

Benefits of having anjeer beyond digestion

The nutritional profile of anjeer extends far beyond the gut. Dr Vatsya highlighted that for those struggling with bone density or low energy, figs serve as a natural supplement.

⦿ Bone density: "Figs are an excellent source of calcium, with approximately 162 milligrams per 100 grams, supporting bone health," Dr Vatsya said.

⦿ Energy levels: He added that the iron present in the fruit 'naturally boosts overall energy metabolism'.

⦿ Heart health: The fruit is also rich in essential minerals. According to the doctor, "Figs contain antioxidants, potassium, and magnesium, which regulate blood pressure and support heart health."

⦿ Cholesterol management: Due to the high fibre content, Dr Vatsya noted that 'they also help manage cholesterol'.

The ‘soak and serve’ method

To reap the maximum benefits, Dr Vatsya suggested a specific preparation method. Raw dried figs can be tough to digest for some, which is why hydration is key. "Consuming two to three soaked figs daily is enough. Soak them at night and have them in the morning," Dr Vatsya advised.

He concluded by saying, "If used widely, figs can be a strong addition to your daily routine."

Note to readers: This report is based on user-generated content from social media. HT.com has not independently verified the claims and does not endorse them.

This article is for informational purposes only and not a substitute for professional medical advice.

The article features advice from Dr. Shubham Vatsya, a senior gastroenterologist and hepatologist at Fortis Hospital, Vasant Kunj, Delhi. He highlights anjeer (figs) as an underrated powerhouse for both digestive and cardiovascular health.

Here is a breakdown of why he recommends making them a daily habit, along with the specific instructions on how and when to consume them for the best results.

Why a Gastroenterologist Recommends Anjeer

Dr. Vatsya explains that figs offer health benefits that go far beyond basic nutrition:

• The "One-Two Punch" for Gut Health: Unlike many fruits that only feature one type of fiber, anjeer is rich in both soluble and insoluble fiber. This combination absorbs water to soften stools and naturally stimulates regular, smooth bowel movements to combat constipation.

  
  
  

• Bone Density Support: Figs are a stellar plant-based source of calcium, delivering approximately 162 mg of calcium per 100 grams to help maintain strong bones.

• Heart Health & Blood Pressure: Packed with potassium, magnesium, and active antioxidants, figs aid in regulating blood pressure and protecting cardiovascular pathways.

• Cholesterol & Energy Management: The high fiber content naturally helps clear excess cholesterol from the system, while its iron content supports healthy energy metabolism.

The "Soak and Serve" Method

Raw dried figs can occasionally be tough on a sensitive digestive tract. To unlock their full potential and maximize nutrient absorption, Dr. Vatsya recommends a simple preparation sequence:

1.Portion Control:Daily Dose.

Take 2 to 3 dried figs per day. Avoid overeating them, as dried fruits are highly concentrated in natural sugars.

2.Overnight Soak:Hydration Phase.

Place the figs in a small bowl of clean water and let them soak overnight (for at least 4 to 6 hours). This rehydrates the fruit, breaks down phytic acid, and makes the nutrients far easier for your gut to absorb.

3.Morning Consumption:The Ideal Timing.

Eat the plump, softened figs first thing in the morning on an empty stomach.

Pro Tip: You can also safely drink the water used to soak the figs. It absorbs some of the soluble fiber and natural nutrients overnight, serving as an excellent gentle tonic for sluggish digestion.

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Neurologist breaks down how much sleep you need by age; we fact-check

 

Sleep is one of the most vital functions for maintaining good health, yet many people struggle to understand just how much of it is truly needed. 

Recently, Dr Sudhir Kumar, MD DM, a neurologist, shared a post on X (formerly Twitter) outlining the average daily amount of sleep required at different stages of life. According to him, “The average daily amount of sleep needed, by age: 1. Newborns (up to 3 months old): 14 to 17 hours. 2. Infants (4 to 12 months old): 12 to 16 hours, including naptime. 3. Young children (1 to 5 years old): 10 to 14 hours, including naptime. 4. School-aged children (6 to 12 years old): 9 to 12 hours. 5. Teenagers (13 to 18 years old): 8 to 10 hours. 6. Adults (18 years and up): 7 to 9 hours. (Note: Individual variations may occur).”

While these numbers give a broad idea of how much sleep one might need, you may wonder why these requirements differ so much between newborns, children, teens, and adults.

So, is the average daily amount of sleep recommended by Dr Sudhir in his post accurate?

Dr Jagadish Hiremath, public health intellectual, tells indianexpress.com, “Yes, the recommendations mentioned are broadly consistent with established guidelines from major health organizations such as the American Academy of Sleep Medicine and the National Sleep Foundation. There can be small variations across different studies, but the ranges are generally accurate for each age group. What matters most is that these ranges are seen as averages, since individual needs can differ slightly depending on genetics, lifestyle, and overall health.”

Why do sleep requirements decrease as we move from infancy to adulthood?

Infants require a higher amount of sleep because their brains and bodies are undergoing rapid growth and consolidation of neural connections. Sleep at that stage is vital for memory formation, learning, and immune system development. 

Dr Hiremath notes, “As children grow, the pace of brain maturation slows down, and while sleep remains critical for learning and emotional regulation, the overall need decreases. By adulthood, the brain has reached structural maturity, so the primary role of sleep shifts towards maintaining cognitive performance, repairing cellular damage, and supporting emotional balance rather than fuelling rapid development.”

Common health risks of sleep deprivation

In the short term, Dr Hiremath says that people may “experience reduced concentration, slower reaction times, mood disturbances, and weakened immunity. Over time, consistent sleep loss increases the risk of hypertension, cardiovascular disease, diabetes, obesity, and even neurodegenerative conditions like Alzheimer’s disease.” It also has a significant impact on mental health, contributing to higher rates of anxiety and depression.

How can parents or caregivers ensure that children and teenagers meet their recommended sleep needs?

Parents and caregivers can help by establishing consistent sleep routines and prioritising a calming pre-bedtime environment. “Creating a predictable schedule for winding down, limiting exposure to screens at least an hour before bedtime, and encouraging physical activity during the day can all make a difference. Bedrooms should be dark, cool, and quiet to support healthy sleep. For teenagers especially, balancing academic demands with adequate rest is important, so parents should help them recognise that good sleep is as essential to performance and well-being as studying or extracurricular activities,” stresses Dr Hiremath. 

DISCLAIMER: This article is based on information from the public domain and/or the experts we spoke to. Always consult your health practitioner before starting any routine.

When Dr. Sudhir Kumar, a well-known neurologist, shared a breakdown on X (formerly Twitter) mapping out exactly how many hours of sleep humans need at different stages of life, it went viral.

But does the neurology back it up? Let's cross-verify his claims against the gold standard guidelines from the National Sleep Foundation (NSF) and the Centers for Disease Control and Prevention (CDC).

The Age-by-Age Breakdown: Fact-Checked

Here is how the neurologist’s claims line up with the global medical consensus.

Age Group	Dr. Kumar's Claim (Hours/Day)	Global Consensus (CDC / NSF)	Verdict
Newborns (0–3 months)	14 to 17 hours	14 to 17 hours	Accurate
Infants (4–12 months)	12 to 16 hours	12 to 15 hours	Accurate (Minor boundary overlap)
Toddlers / Preschool (1–5 years)	10 to 14 hours	10 to 14 hours (Merged range)	Accurate
School-Aged (6–12 years)	9 to 12 hours	9 to 12 hours	Accurate
Teenagers (13–18 years)	8 to 10 hours	8 to 10 hours	Accurate
Adults (18+ years)	7 to 9 hours	7 to 9 hours (7–8 for seniors 65+)	Accurate

The Biological Reality: Why Sleep Declines with Age

The numbers check out perfectly. The main reason our sleep needs shift so drastically is driven by brain development and structural maturity:

• Infancy & Childhood: The brain is undergoing rapid neuroplasticity (building and pruning neural pathways). Deep sleep is directly tied to growth hormone release, physical development, and consolidating memory and language.

• Adulthood: By the time we hit our late teens/early 20s, the brain has reached structural maturity. Sleep shifts from a "building tool" to a "maintenance crew"—focusing on repairing cellular damage, clearing out metabolic waste (like beta-amyloid plaques), and maintaining cognitive balance.

Crucial Nuances the Charts Don't Tell You

While the numbers are accurate, public health officials emphasize two massive caveats:

1. The "6-Hour" Illusion

Many adults claim, "I've been sleeping 5 to 6 hours a night for years and I function perfectly." Neurologists warn that this is usually a case of chronic sleep deprivation adaptation—you've simply forgotten what being fully alert feels like. While a rare genetic trait called Short Sleep Syndrome allows less than 1% of the population to thrive on 5 hours, the other 99% of us face an increased risk of hypertension, cardiovascular disease, and weakened immunity if we shortchange this window.

2. Quality Trumps Quantity

Getting 8 hours of highly fragmented, shallow sleep (often caused by sleep apnea, alcohol use, or late-night screen exposure) leaves you just as exhausted as getting 5 hours of good sleep.

The "Sleep Vacation" Test: If you want to find your true individual baseline within your age bracket, take a week or two without setting an alarm (like on a holiday). Once you pay off your initial "sleep debt" from the first few days, your body will naturally settle into its true, genetically preferred sleep duration.

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What you see first reveals the hidden side of your personality

 

There's no human immune to the charm of knowing themselves more. Of exploring different sides of their personality and analysing what they get to know about themselves. This is why one after another, you keep on clicking on these optical illusions, curious as a cat to see what your brain reveals about yourself. Psychologists have made use of visual tests similar to these to glimpse into your subconscious, to see what your brain thinks and how it reveals a side of you unknown before.

This particular optical illusion test is based on a black and white tricky image. Depending on what image you see first, the elephant or the village, the image reveals your hidden personality. That split-second view is the key to unlocking more insight about yourself.

If you saw the elephant: The intuitive observer

If you see the elephant first, it means you first analyse the big picture before delving into the small stuff. You may appear calm and wise but you notice and deeply think about things others usually miss. You trust your gut and believe in letting life unfold organically.

You are not the overanalyser, you are the observer, the one who works on their feelings and knows when something is right or wrong.

If you saw the village: The grounded empath

If you noticed the people, houses, trees and clouds, then you are a detail-oriented person who is emotionally attuned. You value safety, closeness, community and tend to put others before yourself. Your ability to focus on the finer things in life makes you kind and observant. You are likely the person everyone goes to for advice on all things life.

The "Why" behind the choice

There is no right answer to this test. Your brain works on previously accumulated information and experiences and chooses what is most relevant to you. This means what you first observe in the image isn't random, it rather reveals the most dominant mindset and emotional lens you hold at this moment.

It is a reminder of how your vision of the world is unique. Whether you saw the elephant or the village, both are powerful and positive ways of navigating life. They reflect your path right now.

Disclaimer

This optical illusion personality test is intended for entertainment and general interest purposes only. It is not a scientifically validated psychological assessment and should not be used as a substitute for professional advice, diagnosis, or evaluation. Individual perceptions may vary based on mood, experiences, and context, and the interpretations provided are broad and not definitive indicators of personality traits.

Ah, the classic optical illusion personality test! These are always fascinating. Your brain instantly makes a split-second executive decision to privilege one image over another based on how you process visual data.

To give you your reading, I need to see the image you're looking at!

Go ahead and upload the picture or describe the two or three things you might be seeing in it (for example: "Is it a tree or two faces looking at each other?" or "A duck or a rabbit?").

Once you drop the details, we'll unwrap what your first instinct says about how your mind operates!

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