New Delhi, 25 July 2025: If you think getting extra sleep is always good for your health, think again. A new study has revealed a startling connection between prolonged sleep and increased risk of early death. According to researchers, adults who regularly sleep more than nine hours a night may face a 34% higher risk of premature death compared to those who sleep 7–8 hours. While sleep is essential for recovery and healing, too much of it might actually signal underlying health issues that can silently shave years off your life.
Oversleeping Is Not the Same as Healthy Sleep Sleeping for over nine hours isn’t necessarily restorative. Studies show that long sleep duration may be associated with fragmented, low-quality sleep and daytime fatigue. This could indicate disrupted circadian rhythms or undiagnosed medical conditions like depression, sleep apnea, or chronic inflammation, all of which are linked to cardiovascular and metabolic disorders.
Higher Risk of Heart Disease and Stroke One of the most alarming findings in oversleepers is the increased risk of cardiovascular problems. Prolonged sleep duration has been tied to higher rates of coronary heart disease, stroke, and heart failure. Excessive sleep is thought to influence inflammatory markers in the body, impair blood vessel function, and increase blood pressure variability—all contributing to a greater chance of heart-related deaths.
Linked to Obesity and Type 2 Diabetes People who sleep more than nine hours regularly tend to have a higher body mass index and poorer glucose metabolism. Longer sleep durations may be a result of low energy, hormonal imbalance, or decreased physical activity, creating a vicious cycle that leads to obesity and insulin resistance—two major risk factors for early mortality.
Mental Health May Be a Hidden Factor Depression and anxiety are both closely associated with long sleep durations. In many cases, oversleeping is a symptom of mental health struggles, which themselves increase the risk of physical health decline. People suffering from depression are more likely to experience social withdrawal, poor diet, and reduced physical movement—all factors that raise the risk of early death.
Why Quality Matters More Than Quantity The study also emphasizes that it’s not just how long you sleep, but how well. Poor sleep quality, frequent night-time awakenings, and irregular sleep-wake patterns are more harmful than simply missing a couple of hours. Even people who sleep the recommended 7–8 hours but have disrupted or unrefreshing sleep are still at risk of chronic diseases.
Too Much Sleep May Mask Undiagnosed Conditions Oversleeping may be your body’s way of signaling something is wrong. Undiagnosed infections, autoimmune disorders, liver problems, or neurological diseases can cause persistent fatigue that leads to long sleep durations. Ignoring these signs could mean missing the early detection window for life-threatening conditions.
How Much Sleep Is Just Right? Most experts agree that 7–8 hours of uninterrupted, good-quality sleep is ideal for adults. Anything less increases risk of obesity and hypertension, but anything consistently more than 9 hours may indicate deeper health concerns. The key is balance: a regular sleep schedule, active daytime routine, and winding down naturally without stimulants or sedatives.
While sleeping in occasionally won’t harm you, consistently clocking more than nine hours of sleep could silently damage your health. The new research is a wake-up call: oversleeping may be just as risky as sleep deprivation. Pay attention to your sleep patterns—not just how long you sleep, but how you feel when you wake up. If you’re sleeping too much and still tired, it’s time to consult a doctor.
