Getting a good night’s sleep isn’t just about feeling refreshed. It’s essential for your overall health. In a recent FirstHealth and Wellness Podcast, Dr. Suzanne Wilson, Chief Medical Information Officer at FirstHealth, discussed why sleep is so important and how to improve your nightly routine.
Think of sleep as your body’s overnight maintenance crew. While you rest, your body repairs cells, balances hormones and clears mental clutter.
One key player in this process, Wilson says, is the glymphatic system, a “plumbing network” in your brain that flushes out toxins and waste.
Without this nightly cleanup, harmful substances can build up, increasing the risk of cognitive decline and other health issues.
Health Benefits of Getting Enough Sleep
Sleep impacts nearly every system in your body. Here’s what happens when you consistently get enough rest:
- Cellular Repair & Immune Boost: Sleep helps heal tissues and strengthens your immune system, reducing your risk of illness.
- Hormone Regulation: Poor sleep disrupts appetite hormones like leptin and ghrelin, making you crave unhealthy foods.
- Brain Detox: Sleep clears toxins linked to Alzheimer’s and dementia, supporting long-term brain health.
Studies show that chronic sleep deprivation is associated with weight gain, diabetes, heart disease and depression. Simply put, better sleep means better health.
The Four Stages of Sleep Explained
Your night’s rest includes four stages:
Stage 1: Light Sleep
The transition phase where your body begins to relax.
Stage 2: Deeper Light Sleep
The largest portion of your sleep cycle.
Stage 3: Slow-Wave Sleep
The most restorative stage for tissue repair and immune strength.
Stage 4: REM Sleep
Dream sleep, critical for memory, learning, and emotional regulation.
“We’ve all had a night or a week where we don’t sleep well, and then you will notice that your thoughts aren’t like they should be, you’re a little more emotional or you’re quick to snap at people,” Wilson said. “When you haven’t gotten good REM sleep, these things will happen, and poor sleep can impact people even more as we get older.”
How Much Sleep Do Adults Need Each Night?
For most adults, the sweet spot is 7–9 hours per night. Quality matters more than quantity, but consistently sleeping less than seven hours can increase health risks.
“There are very, very few people that can do well on five hours or less a night,” Wilson said.
While catching up on sleep over the weekend can help reduce fatigue, it won’t fully restore cognitive performance, so aim for consistency.
Top Sleep Disruptors and How to Fix Them
Dr. Wilson highlights three common culprits:
- Screen Time Before Bed: Blue light from devices suppresses melatonin, making it harder to fall asleep. Turn off screens at least 30–60 minutes before bedtime.
- Stress and Anxiety: Try journaling or calming activities like yoga to quiet a racing mind.
- Irregular Sleep Schedule: Your body craves consistency. Go to bed and wake up at the same time every day.
If you suspect sleep apnea—especially if you snore loudly or wake up tired—seek professional evaluation. Untreated sleep apnea is linked to heart disease and stroke.
Sleep Myths Debunked
- Alcohol helps you sleep: It may make you drowsy, but it disrupts REM sleep, reducing memory and learning.
- Older adults need less sleep: They still need 7–9 hours.
- Exercise before bed is bad: Heavy workouts can interfere with sleep, but light exercise like yoga can help.
One Tip to Start Tonight
Create a consistent bedtime routine. Turn off screens, avoid heavy meals late at night, and aim for the same bedtime every evening. These small changes can make a big difference in your sleep quality.
Ready to Sleep Better?
Learn more about improving your sleep and explore FirstHealth’s resources at FirstHealth.org/sleep
