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Do you know what happens if you sleep for ‘6 hours per night for 2 weeks'? Hyderabad neurologist explains

Updated on: Mar 1, 2026, 10:26:52 IST
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Getting sufficient sleep is necessary for cognitive health. (Unsplash)
Getting sufficient sleep is necessary for cognitive health. (Unsplash)

Sleeping less than the required hours every night gets registered by the brain even if the body feels alright, explains Dr Sudhir Kumar. 

The popular perception of a healthy lifestyle comprises being active as much as possible, eating healthy and working out. Thus, it stands to reason that one vital component gets missed out by most: sleep.

While we physically rest as we sleep, it is very much an active process internally as the body repairs the day’s wear and tear in this period. With modern life getting increasingly busy for the average person, sleep deprivation is a condition that many face and even embrace willingly.

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Sometimes, even the amount of sleep that one gets and considers themselves well rested is biologically insufficient. Taking to X on February 27, Dr Sudhir Kumar, MD, DM, a neurologist at Apollo Hospitals in Hyderabad, highlighted what happens if one gets six hours of sleep instead, for two straight weeks.

Impact of sleeping 6 hours at night

According to Dr Kumar, an individual is likely to feel physically fine after sleeping for only six hours every night. However, that may not truly be the case.

In controlled studies, people restricted to six hours of sleep per night for two weeks performed cognitively like they had stayed awake for 24 to 48 hours straight,” the neurologist stated in his post.

The most concerning fact that the study revealed was that the participants did not notice the difference and “believed they were functioning normally.” This is because sleep deprivation does not make an individual feel “drunk.” Instead, it makes a person feel confident.

However, the brain shows significant changes. They are as follows:

  • Reduced attention span
  • Slower reaction time
  • Impaired working memory
  • Poorer decision-making

How long does a person need to sleep?

Most adults require seven to nine hours of sleep every night, not only because it is comfortable but because their cognitive health depends on it, shared Dr Kumar.

According to the neurologist, sleeping every night for six hours is not a productivity hack. It is cumulative neurological stress. While an individual may not notice the decline, the brain is sure to take note.

“Sleep is not optional maintenance,” he added. “It is daily brain repair.”

The number of hours an individual needs to sleep per day, based on their age, according to the Mayo Clinic, is listed as follows:

  • Infants (4 months to 12 months): 12 to 16 hours
  • 1 to 2 years: 11 to 14 hours
  • 3 to 5 years: 10 to 13 hours
  • 6 to 12 years: 9 to 12 hours
  • 13 to 18 years: 8 to 10 hours
  • Adults: 7 or more hours

Note to readers: This article is for informational purposes only and not a substitute for professional medical advice. Always seek the advice of your doctor with any questions about a medical condition.

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

  • Debapriya Bhattacharya
    ABOUT THE AUTHOR
    Debapriya Bhattacharya

    Debapriya Bhattacharya is a Content Producer at Hindustan Times. He started his career in 2022, working in newsrooms in beats like education, US news, trending stories, and entertainment. In his new role in the lifestyle desk, he seeks to deliver a balanced blend of research-driven reporting and creative storytelling from health and recipes to art and culture. Science, philosophy, food and pop culture are what pump his veins and help bring heart to his stories. Debapriya tries to see out subjects that will allow him and readers to explore new frontiers and improve the quality of life for all. The explorations can be both external and internal, as thoughts seek to be as chaotic as the greater universe. As a citizen of the world, Debapriya has been fascinated by the lives of people across the globe throughout time. His curiosity leads him to explore new linguistic and cultural landscapes to broaden his horizons and deepen his understanding of global narratives. Beyond the newsroom, Debapriya loves to participate in debate and theatre, spaces that he considers to be holy grounds for nuance and self-expression. A graduate from Ashutosh College, University of Calcutta, Debapriya completed his Master's degree from the same university in 2022. An ambiverted bibliophile, he loves his solitude as much as he adores stimulating conversations. And despite his reverence for tech, libraries continue to be his favourite place for research.Read More

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