SUBSCRIBE ON:

The Surprising Reason You’re Exhausted All the Time | Dr. John La Puma

Why you’re always tired may have less to do with your workload, your diet, or your willpower than you think.

Many people wake up exhausted despite sleeping seven hours, exercising regularly, drinking coffee, and doing everything modern wellness culture tells them to do. By mid-afternoon, they are fighting brain fog, struggling to focus, and wondering why their energy never seems to fully return.

In this episode of Passion Struck, John R. Miles sits down with Dr. John La Puma, physician, bestselling author, pioneer of Culinary Medicine, and founder of EcoMedicine, to explore a surprising explanation for modern fatigue. Drawing from more than 2,000 scientific studies and his groundbreaking book Indoor Epidemic, Dr. La Puma explains how spending 93% of our lives indoors is disrupting our biology in profound ways.

Together, they examine the relationship between burnout, sleep, attention, immune health, loneliness, and the natural environment, revealing why many of the symptoms we associate with modern life may actually be signs of environmental mismatch. This conversation offers a new lens through which to understand energy, resilience, and human flourishing in an increasingly indoor world.

Why Do I Feel Tired All the Time?

For many people, fatigue has become a permanent background condition. We assume it is simply the price of modern life. We blame demanding careers, family responsibilities, stress, aging, or poor sleep. While each of these factors can contribute to exhaustion, Dr. La Puma argues that an equally important variable often goes unnoticed: the environment in which we spend our lives.

Human beings evolved outdoors. Our biology developed in response to natural light, changing weather patterns, fresh air, varied terrain, and constant interaction with the living world. Today, most of us move through a cycle of homes, offices, vehicles, gyms, and screens, spending approximately 93 percent of our lives indoors. According to Dr. La Puma, this shift has created what he calls the Indoor Epidemic—a disconnect between the environments our bodies expect and the environments we now inhabit.

The result is more than an inconvenience. It influences how we sleep, how we think, how we regulate stress, and how effectively we recover from the demands of daily life. Understanding fatigue through this lens allows us to ask a different question. Instead of asking what is wrong with us, we can begin asking whether our environment is supporting the biological systems on which our energy depends.

How Indoor Living Disrupts Your Body’s Energy Systems

One of the most compelling frameworks Dr. La Puma shares is that indoor living affects four foundational biological systems simultaneously.

The first is the circadian master clock, which depends on natural light to regulate sleep, alertness, hormones, and recovery. The second is the mitochondria, the energy-producing structures inside our cells that respond to specific wavelengths of sunlight. The third is the gut-brain axis, which relies on interactions with healthy environmental microbes that have become increasingly rare in sanitized indoor environments. The fourth is the glymphatic system, the brain’s cleaning mechanism that removes metabolic waste during deep sleep.

When even one of these systems becomes dysregulated, people often experience fatigue, poor concentration, and diminished resilience. When multiple systems are disrupted simultaneously, the result can feel like burnout, chronic exhaustion, and persistent brain fog.

This framework reframes energy as something larger than personal discipline. It reveals how biological performance emerges from a relationship between our bodies and the environments we occupy every day.

Why Burnout May Be an Environmental Problem

Burnout is commonly discussed as a psychological challenge. We focus on stress management, boundaries, emotional resilience, and workload reduction. While these approaches have value, Dr. La Puma introduces a complementary perspective that deserves greater attention.

He suggests that burnout may often be a symptom of environmental dysregulation. Modern indoor life limits exposure to natural light, reduces movement, increases screen saturation, narrows sensory experiences, and isolates people from many of the environmental cues that help regulate human physiology.

In a pilot burnout intervention, Dr. La Puma tested several approaches, including humor-based messaging, office plants, sensory modifications, and brief periods of outdoor exposure. The intervention that produced the most meaningful results was remarkably simple: spending five intentional minutes outdoors during the workday.

The significance of this finding extends beyond workplace wellness. It suggests that recovery may depend not only on reducing demands but also on restoring the environmental inputs that help human beings function at their best.

How Morning Sunlight Improves Sleep, Focus, and Recovery

One of the most practical and powerful insights from this conversation centers on morning light.

Exposure to natural sunlight within the first hour after sunrise helps calibrate the body’s circadian rhythm. This process influences cortisol release, alertness, mood regulation, and the timing of melatonin production later that evening. In other words, the quality of your sleep tonight begins with the light your eyes receive this morning.

Dr. La Puma explains that deep sleep is essential for physical recovery, cognitive performance, memory consolidation, and the operation of the glymphatic system. During deep sleep, the brain undergoes a cleaning process that removes waste products associated with cognitive decline and neurological disease.

Many people attempt to improve sleep by focusing exclusively on nighttime routines. This conversation highlights an often-overlooked reality: restorative sleep begins long before bedtime. It begins with exposure to natural light and the environmental signals that tell the body what time it is.

Key Highlights from this Episode on Why You’re Always Tired

Why Americans now spend approximately 93% of their lives indoors
The concept of ultra-processed time and its impact on well-being
How indoor living disrupts circadian rhythms, mitochondria, the gut-brain axis, and the glymphatic system
Why burnout may be an environmental problem rather than solely a psychological one
The role of morning sunlight in improving sleep, focus, and energy
How forest bathing supports immune function and stress reduction
The relationship between nature, awe, and human flourishing
Why outdoor environments help reduce loneliness and increase social connection
Practical ways to transform incidental outdoor moments into medicine
The science behind the 7% Outdoor Rx

Why This Conversation About The Indoor Epidemic Matters Today

As technology continues to reshape how we live and work, many of the challenges people face today are becoming increasingly difficult to explain through traditional models of health and performance alone.

Rates of burnout, fatigue, loneliness, sleep disruption, and attention difficulties continue to rise despite unprecedented access to information, health tracking tools, and wellness resources. This conversation challenges us to consider whether part of the solution lies beyond optimization and inside a deeper understanding of human biology.

Dr. La Puma’s work reminds us that health is not solely determined by what happens within the body. It is also shaped by the environments that surround us. Reconnecting with nature is not merely a lifestyle preference. It may be one of the most powerful and accessible ways to restore energy, resilience, perspective, and well-being in a world increasingly lived indoors.

Indoor Epidemic: A New Prescription for Energy, Focus, and Longevity

In Indoor Epidemic: 93% Inside Steals Sleep, Focus & Years—The 7% Outdoor Rx Restores Them, Dr. John La Puma presents a compelling argument that many modern health challenges stem from environmental conditions rather than personal shortcomings.

Drawing on thousands of scientific studies and decades of clinical experience, he explains how natural light, outdoor movement, fresh air, sensory engagement, and time spent in green and blue spaces influence sleep quality, cognitive performance, metabolic health, immune resilience, and emotional well-being.

The book offers a practical framework for reclaiming these lost biological inputs through simple, measurable actions that fit into everyday life. Rather than adding another wellness system to an already crowded schedule, Indoor Epidemic helps readers rediscover the environmental conditions that human beings evolved to thrive within.

The 7% Outdoor Rx: Turning Everyday Time Into Medicine

One of the most encouraging ideas from Indoor Epidemic is that most people do not need to radically redesign their lives.

Dr. La Puma points out that we already spend small amounts of time outdoors throughout the day—walking to a car, taking a lunch break, running errands, walking a dog, or transitioning between locations. The challenge is not necessarily finding more time. The challenge is becoming more intentional with the time we already have.

His Outdoor Rx encourages people to transform incidental outdoor moments into restorative experiences. Looking at the horizon instead of a screen, taking a walking meeting, drinking coffee outside in the morning, spending a few minutes in a garden, or establishing a screen curfew before bed can create meaningful biological benefits over time.

The goal is not perfection. It is reconnection.

The Science Behind Forest Bathing, Awe, and Immune Health

The natural world influences far more than mood. It also affects immune function, stress regulation, and physiological recovery.

Dr. La Puma explores the growing body of research behind forest bathing, a practice that involves intentionally spending time in natural environments. Trees release aromatic compounds called phytoncides, which appear to increase the activity of natural killer cells—important components of the immune system responsible for identifying and eliminating harmful cells.

Yet the benefits extend beyond immunity. Nature also invites experiences of awe, perspective, and sensory engagement. Modern life often concentrates attention within digital environments dominated by screens, notifications, and cognitive demands. Natural environments activate a different mode of awareness, encouraging observation, reflection, curiosity, and presence.

These experiences help explain why time spent outdoors frequently feels restorative in ways that are difficult to replicate through technology or productivity systems alone.

Why Nature Helps Reduce Loneliness and Restore Connection

The conversation also explores one of the defining challenges of modern life: loneliness.

Despite living in an age of unprecedented digital connectivity, many people feel increasingly isolated. Dr. La Puma argues that outdoor environments naturally encourage forms of social interaction that are often absent from indoor life. Walking a dog, gardening, taking a neighborhood walk, or spending time in public green spaces creates opportunities for connection that rarely emerge while sitting behind screens.

These interactions may appear small, yet they contribute to something fundamental. They remind us that we are part of a larger ecosystem of relationships, communities, and shared experiences.

The natural world offers more than health benefits. It offers perspective. It creates opportunities for belonging. It reminds us that human flourishing depends not only on productivity and achievement, but also on connection and participation in something larger than ourselves.

What Eric Ries Teaches About Building Trust in Organizations

A recurring theme throughout the discussion is that culture, trust, and character are not things leaders can command; they are emergent properties.

Just as a gardener cannot force a plant to grow, leaders cannot simply demand trust, purpose, or integrity. They can only create the conditions that allow those qualities to flourish.

This requires intentional leadership, thoughtful governance, and a commitment to protecting the values that matter most. It requires leaders to think beyond quarterly results and focus on the long-term health of the systems they are building.

The organizations that thrive over decades are often the ones whose leaders understand that culture is cultivated, not imposed.

Guest Bio – Who Is John La Puma?

Dr. John La Puma is a board-certified internist, professionally trained chef, regenerative farmer, bestselling author, and widely recognized pioneer of Culinary Medicine. He co-created the first Culinary Medicine curriculum taught at a U.S. medical school and has authored more than 50 peer-reviewed scientific papers along with multiple bestselling books translated into numerous languages.

As the founder of Chef Clinic and a leading voice in EcoMedicine, Dr. La Puma’s work explores the powerful relationship between food, nature, lifestyle, and long-term health. His research has been published in leading medical journals including The New England Journal of Medicine, JAMA, and BMJ, and he has presented at institutions such as Harvard, Stanford, TEDMED, and UCLA. His latest book, Indoor Epidemic, expands his work into the science of how modern environments influence human biology, energy, resilience, and longevity.

Can Going Outside Actually HEAL Burnout? | Dr. John La Puma on YouTube Now!

Learn More and Connect

👉 All episode links, my books You Matter, Luma, and The Mattering Effect, The Ignited Life newsletter, and the Start Mattering store are here: linktr.ee/John_R_Miles
🛍️ StartMattering.com | 🔗 TheIgnitedLife.net

Want More Passion Struck?

Listen to Morley Robbins on How You Reclaim Your Health and Vitality
Catch Dr. Stephanie Estima on Deciphering the Language of Symptoms

FAQ (Frequently Asked Questions)

Can Spending Too Much Time Indoors Make You Tired?

Yes. According to Dr. John La Puma, spending approximately 93% of our lives indoors creates what he calls an “Indoor Epidemic” that disrupts several biological systems responsible for energy, recovery, and cognitive performance. Indoor living reduces exposure to natural light, fresh air, environmental microbes, and the sensory experiences humans evolved with. Over time, this environmental mismatch can contribute to chronic fatigue, brain fog, poor sleep, and reduced resilience.

Why Do I Feel Exhausted All the Time Even When I Sleep?

Feeling exhausted despite getting enough sleep may be a sign that your sleep is not as restorative as it should be. Dr. La Puma explains that exposure to natural morning light plays a critical role in regulating the body’s circadian rhythm and supporting deep sleep. Without proper circadian alignment, people may spend enough time in bed but still wake up feeling tired because the body’s recovery systems are not functioning optimally.

How Does Morning Sunlight Improve Energy and Sleep?

Morning sunlight acts as a biological signal that helps set the body’s internal clock. Exposure to natural light within the first hour after sunrise increases alertness during the day and supports healthy melatonin production later in the evening. This process improves sleep quality, enhances daytime energy, and helps regulate mood, focus, and overall recovery.

What Is the Glymphatic System and Why Does It Matter?

The glymphatic system is the brain’s natural cleaning mechanism. During deep sleep, cerebrospinal fluid helps clear metabolic waste and proteins that accumulate throughout the day. Dr. La Puma explains that this process is essential for cognitive performance, memory, and long-term brain health. When sleep quality suffers, the glymphatic system becomes less effective, leaving people feeling mentally foggy and fatigued.

Can Screen Time Cause Fatigue and Brain Fog?

Yes. Excessive screen exposure contributes to what Dr. La Puma calls “ultra-processed time.” Constant digital stimulation can overwhelm attention, increase mental fatigue, and interfere with the body’s natural sleep-wake cycle. Screens also encourage prolonged near-focus work, which can strain the eyes and reduce opportunities for restorative experiences such as outdoor movement, horizon viewing, and social connection.

What Is Forest Bathing?

Forest bathing is the practice of intentionally spending time immersed in nature using all of your senses. Research discussed in this episode shows that trees release compounds called phytoncides that may strengthen immune function and reduce stress. Forest bathing has also been associated with improved mood, lower stress levels, enhanced attention, and greater feelings of well-being.

How Does Nature Help Reduce Burnout?

Dr. La Puma argues that burnout is often influenced by environmental dysregulation. Modern indoor life limits exposure to natural light, movement, fresh air, and sensory diversity. Time spent outdoors helps restore many of these missing inputs, supporting circadian health, reducing stress, improving attention, and enhancing recovery. Even brief periods of intentional outdoor time can have meaningful effects on energy and well-being.

Why Does Nature Improve Focus and Cognitive Performance?

Natural environments give the brain an opportunity to recover from constant cognitive demands. Looking at distant horizons, spending time in green spaces, and taking breaks from screens help reduce mental fatigue and restore attention. Dr. La Puma explains that our eyes and brains benefit from distance and sensory variety in much the same way our bodies benefit from movement and fresh air.

How Much Time Outside Do You Need Each Day?

Dr. La Puma recommends aiming for at least 17 intentional minutes outdoors each day as a minimum effective dose. For individuals seeking optimal health, resilience, and longevity benefits, research suggests that approximately 300 minutes per week—about 43 minutes per day—provides the greatest measurable improvements.

What Is the 7% Outdoor Rx?

The 7% Outdoor Rx is Dr. La Puma’s framework for reclaiming the small amount of time we already spend outside each week. Rather than adding more obligations to a busy schedule, the goal is to transform everyday moments—such as morning coffee, walking the dog, lunch breaks, and commuting—into intentional opportunities for biological recovery, mental restoration, and improved health.

Can Nature Improve Loneliness and Social Connection?

Yes. Outdoor environments naturally encourage human interaction and shared experiences. Whether through walking, gardening, spending time in parks, or simply being present in public spaces, nature creates opportunities for connection that help reduce feelings of isolation. Dr. La Puma believes these interactions contribute not only to better mental health but also to a greater sense of belonging and meaning.

What Is EcoMedicine?

EcoMedicine is Dr. La Puma’s approach to health that explores how interactions with natural environments influence physical, mental, and emotional well-being. It examines how factors such as sunlight, fresh air, soil, water, green spaces, and outdoor movement affect sleep, energy, immune function, cognitive performance, and longevity.