Your Year of Health · March
Sleep
Sleep is not wasted time — it’s when your body repairs, your brain files away the day, and your hormones reset. Get enough of it and almost everything works better: focus, mood, metabolism, and immunity.
Sleep trouble is one of the most common — and most fixable — health complaints. Most causes respond well to simple changes, and your primary care office is a good place to start.
The Basics
How much sleep do I actually need?
Most adults need 7 to 9 hours a night. Quality matters as much as quantity — steady, uninterrupted sleep is more restorative than the same number of hours broken into pieces. Your sleep need is mostly set by biology, and very few people truly function well on less than 7 hours, even if they’ve gotten used to it.
Why does sleep matter so much?
While you sleep, your brain and body are busy: consolidating memories, clearing waste from the brain, repairing tissue, balancing the hormones that control appetite and stress, and supporting your immune system. Cut it short and nearly everything suffers — concentration, mood, metabolism, and long-term health.
Can you “catch up” on sleep?
Partly. A weekend lie-in can ease short-term sleep debt, but it doesn’t fully undo the effects of chronically short nights. A consistent schedule beats a cycle of deprivation and catch-up.
How Sleep Works
What happens while I sleep?
Sleep moves through repeating cycles of about 90 minutes, each with lighter and deeper stages plus REM (dream) sleep. Deep sleep restores the body; REM supports memory, learning, and emotional processing. You need several complete cycles a night, which is why both how long and how continuously you sleep matter.
What is the “body clock”?
Your circadian rhythm is an internal roughly 24-hour clock, set mainly by light, that tells your body when to feel alert and when to feel sleepy. Morning light, regular timing, and darkness at night keep it aligned. Jet lag, night shifts, and late-night screens throw it off.
What do melatonin and caffeine do?
Melatonin is the hormone that rises in the evening to signal “night”; light — especially the blue light from screens — suppresses it. Caffeine blocks the brain’s building “sleep pressure” and can linger six hours or more, which is why an afternoon coffee can quietly cost you sleep.
Common Problems
Insomnia
Trouble falling asleep, staying asleep, or waking too early despite having the chance to sleep. It’s the most common sleep complaint and is often tied to stress, habits, or another condition. Cognitive behavioral therapy for insomnia (CBT-I) is the most effective first-line treatment — more so than sleeping pills over the long run.
Sleep apnea
Repeated pauses in breathing during sleep, often with loud snoring and daytime sleepiness. It’s common, frequently undiagnosed, and raises the risk of high blood pressure and heart disease — but it’s very treatable. Tell your doctor if you snore loudly or wake up unrefreshed.
Restless legs and others
Restless legs syndrome (an uncomfortable urge to move the legs at night), circadian rhythm disorders (a body clock out of sync with your schedule), and nightmares or sleepwalking can all disrupt sleep. Most have effective treatments.
When it’s stress or schedule
Sometimes poor sleep comes from shift work, a new baby, anxiety, pain, or screens in bed rather than a sleep disorder itself — and the fix follows the cause.
Better Sleep Habits
The fundamentals of good “sleep hygiene” are simple and genuinely effective:
- Keep a consistent schedule — the same wake time every day, weekends included, anchors your body clock.
- Get morning light and daytime activity. Both strengthen your sleep–wake rhythm.
- Wind down. Dim the lights and step away from screens 30–60 minutes before bed.
- Make the bedroom cool, dark, and quiet.
- Watch caffeine after midday and limit alcohol — it makes sleep lighter and more broken.
- Reserve the bed for sleep. If you can’t sleep after about 20 minutes, get up and do something calm until you feel drowsy.
- Be careful with long or late naps, which can steal from nighttime sleep.
Sleep & Your Health
What does poor sleep do over time?
Ongoing short or poor-quality sleep is linked to weight gain, type 2 diabetes, high blood pressure, heart disease, weakened immunity, and depression and anxiety. It also slows attention and reaction time — drowsy driving is a genuine danger.
Can better sleep improve other conditions?
Yes. Treating sleep apnea can lower blood pressure, and improving sleep supports mood, blood sugar, and recovery. Sleep is a foundation the rest of your health is built on, so improving it tends to pay off broadly.
When to Get Help
Talk with your doctor if you regularly struggle to fall or stay asleep, snore loudly or seem to stop breathing in your sleep, feel sleepy or unrefreshed despite enough hours, depend on sleep aids to function, or find that poor sleep is affecting your mood, work, or safety. Simple steps help many people; for others, a sleep evaluation or sleep study uncovers a very treatable cause.
Don’t drive drowsy — and reach for proven approaches before pills.
If you’re fighting to stay awake at the wheel, pull over; drowsy driving causes thousands of crashes a year. And for ongoing insomnia, cognitive behavioral therapy for insomnia (CBT-I) is the recommended first-line treatment and works better long-term than sleeping medication.
Useful Links
Talk it through with Dr. Mui
Sleep is part of routine primary care. Book a visit to sort out what’s getting in the way, rule out conditions like sleep apnea, and build a plan that gets you resting again.
Prefer to ask first? Text Dr. Mui at 617-675-4085.
This page is for general education and isn’t a substitute for professional medical advice, diagnosis, or treatment. Always talk with a qualified health provider about your specific situation.