Sleep Guides

• How Much Sleep Do You Need? A Guide by AgeAdults commonly need 7 to 9 hours of sleep. See the hour ranges by age, how 90-minute cycles shape timing, and how to test whether you are rested.
• Sleep Debt Explained: What It Costs YouSleep debt is the running total of hours you owe. See how it builds across a week, what it changes, and how to pay it back without shifting your clock.
• Caffeine and Sleep: Timing, Half-Life and Cut-OffsCaffeine has a half-life of about five to six hours, so a 3pm coffee is still half active near bedtime. Set a cut-off that protects your sleep.
• Snoring: When It Is Normal and When to WorryMost snoring is just noise, but snoring with pauses or gasping can signal sleep apnoea. See the red flags and what actually helps tonight.
• Sleep Deprivation Effects on the Brain, Heart and BodySleep deprivation slows reaction time, raises appetite and lifts blood pressure. See what one short night changes and what a week of short nights does.
• How to Fix Your Sleep Schedule in Two WeeksReset a late or broken sleep schedule with fixed wake times, morning light and 15-minute bedtime moves. A two-week plan, and what to do if it stalls.
• Alcohol and Sleep: Why a Nightcap BackfiresAlcohol cuts the time it takes to fall asleep, then fragments the second half of the night and suppresses REM. See what changes and what helps.
• Insomnia vs Sleep Deprivation: How to Tell Them ApartInsomnia is trouble sleeping when the chance is there; sleep deprivation is not enough chance. Telling them apart decides which fix actually works.