The amount of sleep you need depends on various factors — especially your age. While sleep needs vary significantly among individuals, consider these general guidelines for different age groups:. Some people claim to feel rested on just a few hours of sleep a night, but their performance is likely affected. Research shows that people who sleep so little over many nights don't perform as well on complex mental tasks as do people who get closer to seven hours of sleep a night. Mayo Clinic does not endorse companies or products.
Well, there's unfortunately no one-size-fits-all number. It depends on your genes, how healthy you are, and how active you are during the day, among other factors. Yet, for most adults, getting between seven and nine hours a night is the sweet spot to ward off daytime sleepiness and feel healthy. As you age, however, your sleep needs do decline slightly -- after age 65, you will likely need between seven and eight hours nightly.
Millions of readers rely on HelpGuide for free, evidence-based resources to understand and navigate mental health challenges. Please donate today to help us protect, support, and save lives. The quality of your sleep directly affects your mental and physical health and the quality of your waking life, including your productivity, emotional balance, brain and heart health, immune system, creativity, vitality, and even your weight. No other activity delivers so many benefits with so little effort! But even minimal sleep loss can take a substantial toll on your mood, energy, mental sharpness, and ability to handle stress.
When you think of what makes up a healthy lifestyle, diet and exercise come to mind, but did getting enough restful sleep? Some researchers consider the lack of sleep that many people get to be at epidemic levels. According to the National Institutes of Health , lack of restful sleep causes a long list of issues:. They're listed as ranges because gender has an influence, as well as lifestyle and health.