Screen Time and Sleep Time 

We all love our phones, tablets, and laptops. They keep us connected, entertained, and productive. Screen time can sometimes be a frustrating topic to dive into because so many of us (dare we say all of us) indulge in necessary (and unnecessary) daily screen time. So, since we are big believers of sharing knowledge, we would like to share a little about how these screens are affecting us so that we can make the best-informed decisions for ourselves. 

How Screen Time Affects Sleep 

The Science in Simple Terms 

The harsh truth is there’s a not so fun trade off with using screens all day; the blue wavelength light these devices emit interferes with the biology that tells you when to be awake and when to sleep. Over time, too much evening screen time can affect sleep quality, daily energy, and even mood. 

What’s Really Happening? 

Your body’s internal clock (the circadian rhythm) is driven mainly by light. Special cells in the retina detect blue rich light and send a “wake up” signal to your brain’s master clock. This blue light suppresses melatonin, the hormone that helps you fall asleep. Melatonin suppression may be handy at sunrise, but not so great at 9 p.m. Our nighttime exposure to bright or blue heavy light shifts our clocks later, so we fall asleep later and get less deep, restorative sleep. Over days and weeks, this leads to “sleep debt”, brain fog, and low resilience. 

Effects on the Brain & Daytime Function 

• Poor sleep impairs attention, memory consolidation, emotional regulation, and decision making. In other words, it makes the day harder and the next night worse. It’s a vicious cycle. 

• Chronic sleep disruption is also linked to higher risk of anxiety, depressed mood, and lower stress tolerance. 

• While blue light itself is the immediate trigger at night, the downstream problem is the sleep loss and circadian dysregulation that follows…and those are what most strongly affect brain health. 

How Much Matters: Quantity and Timing 

There’s a second piece to this equation. It’s not just when you use screens, it’s how much. Higher total recreational screen time is consistently associated with: 

1. Poorer sleep quality 

2. More daytime fatigue 

3. Worse concentration 

4. In many studies (especially in adolescents), higher rates of anxiety and depressive symptoms 

We should note that the relationship between screen time and these symptoms is complex! In other words, screen time itself can’t be the only aspect to blame. We have to acknowledge that social media, the daily comparison to others, disrupted routine, less movement and exercise, and sleep loss all play a role in the symptoms above. But the pattern with consistent screen use is strong enough that experts pay attention. 

Is There Evidence Linking Screen Time to Worsening Mood? 

To be frank, yes. Multiple observational studies and reviews show an association between greater screen time (particularly social media and passive scrolling) and worse mental health outcomes, especially in teens and young adults. 

Practical and Realistic Steps to Help 

No Shame, Just Tools 

1. Try a screen curfew: avoid screens for 1–2 hours before bedtime. Replace the habit with a calming routine (reading a paper book, stretching, taking a warm shower, breathwork). 

2. If you must use screens at night, use night mode / warm display AND lower brightness. This helps, but isn’t a magic bullet. 

3. Consider blue light blocking glasses in the evening if you work late with screens. They’re inexpensive and many people notice better sleep when using them. 

Daily Habits to Support Sleep and Mood 

1. Recall from our newsletter from last week that going outside to embrace the bright daylight in the morning does wonders for your sleep. Aim for 10–20 minutes of morning sun (even on a cloudy day) to help anchor your circadian rhythm and make that evening melatonin release more reliable. 

2. Limit passive evening use. Binge watching and late night social media scrolling are especially disruptive. What if you tried to swap one night a week for a tech-free evening? 

3. Move during the day. Activity helps you fall asleep faster and improves mood. 

4. Schedule screen breaks throughout your work day: every 60 minutes (stand, move… blink). 

5. Keep screens out of the bedroom whenever possible. Make your bedroom a sleep sanctuary. 

If Your Sleep Is Already Poor: Extra Tips 

• Prioritize sleep regularity: same bed and wake time every day, including weekends. 

• Consider supplementing melatonin for a short period (under clinician guidance) if your clock is shifted; it can be a useful tool to reset timing. 

• Address stress: breathwork, journaling, or a short evening routine can calm the nervous system and help sleep come easier. 

Final Thoughts 

We all can agree screens are here to stay, but it’s helpful to know that small changes to when and how we use our devices can pay off in better sleep, clearer thinking, and steadier mood. Great sleep can happen by changing just one small habit at a time.