We’ve all likely heard from our family at some point: “Wake up now and study for good grades… you have a lifetime to sleep.”
But during exam season, that advice may actually be doing more harm than good.
As board exams approach, students across the country are stretching study hours, cutting down on rest, and pushing their limits. But doctors and researchers say this common strategy could be affecting exactly what students are trying to improve: memory, focus and performance.
WHY SLEEP IS NOT A WASTE OF TIME
Dr Meghna Phadke Sultania, paediatrician and senior consultant at Asian Institute of Medical Sciences, explains that adequate sleep is as important as studies and nutrition.
In simple terms, sleep is when the brain does its most important work.
According to the American Academy of Sleep Medicine, it is during sleep that the brain organises what you learned through the day. It sorts, stores and strengthens information, making it easier to recall later.
This means those extra late-night hours may not always translate into better results. Without enough rest, the brain struggles to retain what has been studied.
HOW SLEEP IMPACTS MEMORY AND FOCUS
Dr Meghna points out that if students don’t get enough sleep for their age, it can directly impact their memory, learning and mental health.
Students often believe that studying longer equals studying better. But lack of sleep can slow down brain function. It becomes harder to focus, understand concepts and remember key points during exams.
The real catch? Even if you study more, your brain may not process or store it properly.
That is why students who are well-rested often perform better, even if they study for fewer hours.
HOW MUCH SLEEP STUDENTS ACTUALLY NEED
Sleep needs vary depending on age, but the requirement is higher than most students assume:
- Nursery children (3–5 years) need about 10 to 13 hours of sleep daily, as this is a crucial stage for brain development.
- Primary school students (6–10 years) require 9 to 12 hours, helping them stay active and improve learning ability.
- Middle school students (11–13 years) should get 9 to 11 hours. At this stage, lack of sleep can lead to irritability and poor concentration.
- Students preparing for board exams (14–18 years) need around 8 to 10 hours of sleep. Dr Meghna highlights that lack of sleep at this stage can lead to memory loss.
Students preparing for competitive exams should aim for at least 7 to 9 hours, which supports focus, decision-making and mental balance.
THE HIDDEN COST OF SLEEP LOSS
Dr Meghna Sultania explains that lack of sleep is becoming a major problem in student life.
Many students think they can study more by sleeping less, but the truth is that lack of adequate sleep hinders the brain’s proper functioning.
The effects show up quickly:
- lack of concentration in studies
- memory loss
- irritability and stress
- headache and fatigue
- weakening of immunity
In the middle of exam season, these are exactly the problems students cannot afford.
SIMPLE HABITS THAT CAN IMPROVE STUDY PERFORMANCE
Instead of cutting sleep, experts suggest improving daily habits to get better results.
Dr Meghna has shared a few simple steps that can make a big difference:
- Make it a habit to sleep and wake up at a fixed time every day.
- Switch off your mobile or laptop at least 1 hour before going to sleep.
- Avoid heavy meals and caffeine consumption late at night.
- Maintain a balance between study and rest.
- Make the room quiet and dark before going to sleep.
These changes may seem small, but they directly impact how well the brain functions the next day.
WHY THIS MATTERS MORE DURING EXAMS
Dr Meghna says that neglecting sleep during student life is like inviting health problems in the future.
But even in the short term, the impact is clear. Exams are not just about how much you study, but how well your brain can recall and apply that knowledge under pressure.
Sleep plays a direct role in that process.
So the next time someone says “you have a lifetime to sleep”, it might be worth rethinking. For students, sleep is not time lost. It is where learning actually comes together.
– Ends
