Article: Why You Feel More Stressed When You Haven’t Been Outside

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Why You Feel More Stressed When You Haven’t Been Outside

Feeling more stressed, restless, or mentally drained after spending all day indoors may have more to do with your environment than you realize.

DISCLAIMER: This content is for educational use only and is not a substitute for professional medical advice. Please consult your healthcare provider for personalized guidance.

Written By: Zoe Rademacher

Think about how you feel after spending an entire day inside staring at screens, moving between the same few rooms, and barely seeing natural light. Now compare that to how you feel after taking a walk outside, sitting in the sun, or spending an afternoon surrounded by trees, water, or open space.

There is a reason those experiences can feel so different.

Getting outside isn't simply a way to "clear your head." Research has associated exposure to natural environments with lower perceived stress and changes in physiological measures related to the stress response. A systematic review examining nature exposure found that studies measuring physiological stress generally reported improvements in measures such as cortisol, heart rate variability, blood pressure, and other markers of stress. [1]

At the same time, being outdoors exposes your body to natural light, creates opportunities for movement, and gives your attention a break from many of the demands of modern indoor life.

Throughout this blog, we'll break down why your body and brain may feel different after spending time outside and how you can realistically incorporate more nature into your day.

How Spending Time in Nature Can Lower Stress

Your environment constantly provides information to your brain. Indoors, that environment is often filled with artificial lighting, notifications, screens, background noise, work responsibilities, and countless things competing for your attention. Even when you aren't consciously thinking about each stimulus, your brain is still processing the world around you.

Natural environments provide a very different type of sensory experience. The movement of trees, sounds of birds or water, natural light, and open spaces can give your attention an opportunity to shift away from constant directed focus.

Researchers have proposed several explanations for why this matters. One is Stress Reduction Theory, which suggests that exposure to natural environments may help reduce physiological arousal and support recovery following stress. Another is Attention Restoration Theory, which proposes that natural environments give the brain an opportunity to recover from the mental fatigue created by prolonged directed attention. [2]

You don't need to disappear into the mountains for an entire weekend to experience nature, either. A walk through a neighborhood, lunch outside, or time at a local park can create an opportunity to temporarily step away from the stimulation surrounding you indoors.

How Nature May Affect Your Nervous System

When you're under stress, your sympathetic nervous system helps prepare your body to respond. Your heart rate can increase, attention becomes more focused, and your body prioritizes the functions needed to deal with a perceived challenge.

This fight-or-flight response is essential, but your body also needs opportunities to recover once a stressful moment has passed.

Your parasympathetic nervous system plays an important role in that recovery. It helps your body transition toward a calmer state where processes such as digestion, restoration, and recovery can take greater priority.

Research investigating natural environments has found associations between nature exposure and several measures related to autonomic nervous-system activity and physiological stress. This doesn't mean that stepping outside instantly "resets" your nervous system, but it suggests that your physical environment may influence how your body responds to and recovers from stress. [3]

If you frequently feel like your body remains on high alert even after the stressful part of your day has ended, read 5 Signs Your Nervous System Is Stuck in Fight or Flight to better understand how chronic stress can show up physically.

Why Natural Light Matters for Stress and Your Circadian Rhythm

Going outside provides something most indoor environments cannot fully replicate: exposure to bright, natural daytime light.

Light is one of the strongest environmental signals for your circadian rhythm, the internal 24-hour clock that helps coordinate sleep, wakefulness, hormone timing, and other biological processes.

Your brain uses the contrast between bright days and darker nights as information about what time it is. Getting light during the day, particularly earlier in your waking period, helps reinforce those timing signals.

This matters for stress because your circadian rhythm and sleep are closely connected. Poor or irregular sleep can make it more difficult to manage stress and regulate emotions the following day, creating a cycle where stress interferes with sleep and inadequate sleep makes stress feel harder to handle.

Research involving more than 400,000 UK Biobank participants found that greater daytime outdoor light exposure was associated with better mood, less tiredness, fewer insomnia symptoms, and several other sleep and circadian-related outcomes. Because much of this research is observational, it cannot prove that outdoor light alone caused those outcomes, but the relationship is another reason daytime light deserves attention. [4]

If your sleep schedule feels out of sync, read Why You're Tired All Day but Wide Awake at Night to learn more about how light, circadian rhythm, stress, and sleep pressure work together.

Why Being Outside Gives Your Brain a Break

Not all exhaustion comes from physical activity. Sometimes your brain is simply tired from paying attention.

Think about an average day spent indoors. You might move between your phone and computer, answer messages, switch between tasks, listen to conversations, remember appointments, and process information for hours at a time.

This requires directed attention, the type of focused mental effort you use to complete a task while ignoring distractions. That ability is valuable, but it can become mentally tiring when you use it continuously.

Natural environments may provide an opportunity for a softer form of attention. Instead of forcing yourself to concentrate on one task, your attention can move more effortlessly toward clouds, trees, birds, water, sunlight, or the environment around you.

This doesn't mean nature eliminates your responsibilities. It gives your brain a temporary change in what it is being asked to process. That may be one reason a short walk outside can leave you feeling mentally clearer even though none of the problems waiting for you have technically changed. Your environment isn't the only thing that can influence what your brain focuses on, either. Read How Gratitude Can Actually Calm Your Nervous System to learn how intentionally shifting your attention toward safety and positive experiences may influence your stress response.

Going Outside Naturally Encourages You to Move

Another benefit of getting outside is you are more likely to move. People with better access to parks, trails, and green environments tend to walk and be more physically active, according to the CDC. Physical activity itself can help reduce stress and support mental well-being, meaning some of the benefits associated with outdoor time may come from the behaviors that nature encourages. [5]

You don't need an intense workout to make your outdoor time worthwhile. A short walk allows you to combine movement, natural light, a change of environment, and time away from screens in one simple habit.

This is also why it can be difficult to separate the benefits of "nature" into one single mechanism. When you step outside, several things often change at once: your light exposure increases, you may move more, your surroundings change, and your attention shifts.

Together, those small changes can create a meaningful break from the environment where much of your daily stress occurs.

Simple Ways to Spend More Time Outside Every Day

You don't need hours of free time or access to a forest to make outdoor time part of your routine. The most useful approach is finding small opportunities that fit into a day you already have.

Try incorporating outdoor time by:

Taking your morning coffee outside instead of drinking it while looking at your phone.
Going for a short walk after lunch to combine natural light, movement, and a mental break.
Taking a phone call outdoors when you don't need to be at your computer.
Eating one meal outside when the weather allows.
Sitting outside for 10 minutes without a screen and allowing yourself to notice what is happening around you.
Choosing a park or trail for your next walk when you have access to one.

You don't need to turn going outside into another task you have to perform perfectly. Start by noticing how much of your average day is actually spent outdoors, and then look for one realistic opportunity to increase it. Consistency matters more than creating the perfect nature routine.

Step Outside Today

Stress management isn't always about adding another complicated wellness practice to your life. Sometimes it begins with changing your environment. Spending time outdoors can expose you to natural light, create opportunities for movement, give your attention a break, and provide a setting that research has associated with lower perceived and physiological stress. [6]

Try stepping outside today without making it productive. Leave your phone behind for a few minutes, take a walk, sit in the sun, or simply pay attention to what's around you. Notice whether your breathing, thoughts, or tension feel any different when you come back inside.

If you're looking for additional support during stressful days, try our BALANCE™ sublingual tincture, designed to support calm nerves, a balanced mood, and a healthy response to everyday stress.

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Your environment is one of the many signals your brain and nervous system respond to every day. Spending a little more of that day outside may be one of the simplest ways to give your mind and body more opportunities to slow down.

References

Written By Paul Frantellizzi