01How Much Sleep Do You Actually Need?

Most people have a vague sense they should be getting 8 hours. In practice, many aren't close — and some are sleeping too much without getting quality rest. The question isn't just how many hours, but whether those hours are doing what they're supposed to do.

03How Many Hours Is Enough?

For most adults, the target range is 7–9 hours per night. But sleep researchers have found that the relationship between sleep duration and health outcomes follows a curve — not a straight line.

Studies have found that people who sleep between 6.5 and 7.5 hours tend to have the best health outcomes, while those sleeping significantly more or less show increased risk for health problems. The same risks associated with too little sleep appear, in different ways, with consistently sleeping too much.

That said, there's genuine individual variation:

  • Some people are natural short sleepers who function well on 6 hours — but this is rare and largely genetic, not a skill that can be trained
  • Teenagers need more sleep than adults (8–10 hours), and their circadian rhythms naturally shift later — making early school start times particularly disruptive
  • Older adults often experience lighter, more fragmented sleep, which can make getting adequate rest harder even with sufficient time in bed
  • During periods of recovery from illness, intense physical training, or high stress, sleep needs temporarily increase

04Signs You're Not Getting Enough Sleep

The tricky thing about sleep deprivation is that it impairs your ability to assess how impaired you are. People who are chronically sleep-deprived often feel like they're functioning fine — until they actually get enough sleep and realize the difference.

Watch for these signs:

  • Relying on an alarm to wake up every day (a well-rested body wakes naturally near its target time)
  • Needing caffeine to function in the morning and again in the afternoon
  • Falling asleep easily in passive situations — car rides, waiting rooms, after meals
  • Difficulty concentrating or making decisions
  • Elevated irritability or emotional reactivity
  • Waking up feeling unrefreshed, even after a full night

Chronic sleep deprivation has been linked to increased risk of hypertension, diabetes, depression, obesity, impaired immune function, and reduced life expectancy. The connection is well-established — sleep isn't a luxury, it's maintenance.

05Why Sleep Quality Matters as Much as Quantity

Eight hours of fragmented, restless sleep doesn't produce the same recovery as eight hours of uninterrupted sleep. The reason comes down to sleep architecture — the cycles of light sleep, deep sleep, and REM that your brain runs through each night.

Deep sleep (also called slow-wave sleep) is when physical restoration happens — tissue repair, immune function, hormone regulation. REM sleep is when cognitive restoration happens — memory consolidation, emotional processing, creativity.

Both are concentrated in different parts of the night. If your sleep is repeatedly interrupted — by noise, discomfort, a partner's movement, or temperature — you lose disproportionate amounts of the stages you need most.

Common culprits that fragment sleep without people realizing it:

  • A mattress that transfers motion from a partner
  • A mattress that's too firm or too soft, causing you to shift frequently
  • Room temperature that's too warm
  • Light from electronics or windows
  • A phone that buzzes or lights up

06Couples and Sleep Compatibility

A growing number of couples sleep in separate bedrooms — not because of relationship problems, but because their sleep needs are incompatible. Different schedules, different temperature preferences, snoring, and different mattress firmness needs all contribute.

Sleeping separately can genuinely improve sleep quality for both partners — and by extension, the relationship. If separate rooms aren't practical, a mattress with strong motion isolation can significantly reduce nighttime disturbances. Hybrid mattresses with pocketed coils, or memory foam mattresses, typically isolate motion much better than traditional innerspring.

For couples with very different firmness preferences, a split king setup with an adjustable base gives each person independent control over their side of the bed.

07Start With Your Bedroom

If you want to sleep better, your bedroom is the place to start. These changes have the most impact:

  • Electronics curfew. Power down screens at least an hour before bed. If you use your phone as an alarm, put it across the room — or use a dedicated alarm clock.
  • Darkness. Even dim light suppresses melatonin. Blackout curtains or a sleep mask make a real difference.
  • Temperature. Most people sleep best between 65–68°F. If you regularly wake up warm, it may be the room, your bedding, or your mattress retaining heat.
  • Noise control. White noise, earplugs, or sound-dampening in the room can help — especially if you live in a noisier area of LA.
  • Your mattress. What you sleep on directly affects how well you sleep. A mattress that's more than 7–8 years old, shows sagging, or leaves you waking up stiff is undermining every other sleep habit you're trying to build.

If your mattress is due for an upgrade, our team at LA Mattress Store can help you find the right fit. Visit one of our 5 showrooms to test options in person, or reach out with questions. We offer a 120-night comfort guarantee — giving you real time to evaluate whether your new mattress is improving your sleep.

08Could It Be a Sleep Disorder?

If you're getting adequate time in bed, practicing good sleep hygiene, and still struggling — it's worth considering whether an underlying sleep disorder is involved. Sleep apnea is the most common and frequently undiagnosed: it causes repeated breathing interruptions during sleep that fragment your sleep cycles without you waking fully.

Symptoms to watch for:

  • Loud snoring or reports of gasping or choking during sleep
  • Waking up with headaches
  • Extreme daytime sleepiness despite adequate hours
  • Difficulty concentrating that doesn't improve with more sleep

Insomnia, restless leg syndrome, and circadian rhythm disorders are also common. If you suspect a sleep disorder, talk to your doctor or a sleep specialist — these conditions are treatable, and addressing them can transform sleep quality more than any bedroom upgrade.

09Frequently Asked Questions

Is it really that bad to sleep less than 7 hours?

Consistently sleeping less than 6–7 hours is associated with measurable increases in health risks including cardiovascular disease, obesity, diabetes, and immune dysfunction. Short-term, it impairs cognitive performance, reaction time, and emotional regulation — often more than the person realizes. Occasional short nights aren't a crisis, but chronic sleep restriction adds up.

Can you make up for lost sleep on weekends?

Partially. Some cognitive performance recovers after a catch-up night, but research suggests that chronic sleep debt isn't fully reversible with weekend sleep. Consistency matters more than recovery. Sleeping significantly later on weekends also shifts your circadian rhythm, which can make Monday mornings harder — a pattern sometimes called social jet lag.

Why do I feel more tired after 9 hours of sleep than 7?

Waking up during deep sleep (slow-wave sleep) causes grogginess, called sleep inertia — and sleeping longer increases your chances of being in a deep stage when the alarm goes off. Consistently sleeping 9+ hours and feeling tired may also point to poor sleep quality rather than too much sleep, or an underlying health issue worth discussing with a doctor.

Does a better mattress actually improve sleep?

Yes, measurably. Studies have found that replacing an old, worn mattress improves sleep quality, reduces back pain, and decreases stress. The effect is strongest when moving from a mattress that's degraded or mismatched to the sleeper's needs. A good mattress isn't magic — but a bad one actively works against you.

How do I know what firmness level is right for me?

Firmness depends primarily on sleep position and body weight. Side sleepers typically need softer to medium support to cushion the shoulder and hip. Back sleepers do best with medium to medium-firm. Stomach sleepers usually need firmer support to prevent spinal sag. Heavier sleepers need firmer options across all positions. The best way to know is to try options in a showroom — our team at LA Mattress Store can walk you through the options based on your specific sleep style.