Modern life has quietly removed something humans evolved to do every single day—and it’s slowly killing us.
In a compelling article published on his Substack newsletter “Two Percent,” health and wellness author Michael Easter—best known for his bestselling book The Comfort Crisis—makes a provocative argument: the real threat isn’t that we’re skipping workouts.
It’s that inactivity itself has become a poison we’ve deliberately engineered into everyday existence.
Co-authored with exercise physiologist Brady Holmer, Easter’s piece reframes decades of “exercise as medicine” messaging by flipping the script entirely—and the distinction could change how millions approach movement.
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The Evolutionary Mismatch That’s Making Us Sick
Humans didn’t evolve to exercise. We evolved to move—constantly, purposefully, and out of necessity.
Harvard evolutionary biologist Daniel Lieberman, author of Exercised: Why Something We Never Evolved to Do Is So Healthy and Rewarding, has spent years documenting how scheduled gym sessions are actually a modern workaround for environments that have pathologically stripped movement from daily routines.
His research reveals a startling gap: only about 20% of Americans meet minimum physical activity guidelines—150 minutes of moderate-to-vigorous activity weekly. That means four out of five people aren’t getting enough movement to maintain basic health.
But here’s what makes Easter’s argument different: instead of blaming lazy individuals, he points to systematically engineered sedentariness.
What Hunter-Gatherers Reveal About Human Movement Needs
Studies of traditional populations like Tanzania’s Hadza hunter-gatherers paint a radically different picture of human activity patterns.
These communities walk between 5 to 10 miles daily as part of normal life—not “exercise,” just survival. They show remarkably low rates of cardiovascular disease, type 2 diabetes, and other chronic conditions plaguing industrialized nations.
They’re not hitting gyms or tracking step counts. Movement is simply woven into every aspect of daily existence: gathering food, building shelter, maintaining social connections.
Lieberman’s work demonstrates that humans evolved to be physically active when necessary or socially rewarding—not to run on treadmills for abstract health benefits decades down the line.
Inactivity As Poison: More Than Just Rhetoric
Easter’s reframing isn’t merely semantic—it fundamentally shifts how we conceptualize the problem.
When exercise is framed as medicine, movement becomes an intervention added to an otherwise neutral baseline. You’re supposed to inject it into your life like a supplement or prescription.
But when inactivity is framed as poison, sedentariness becomes the aberration—a deviation from what human bodies evolved expecting.
This distinction has enormous practical implications for behavior change. Instead of asking “How do I add exercise?” the question becomes “How do I avoid poisoning myself with stillness?”
The Hidden Cost of Sitting Still
Physical inactivity costs the U.S. healthcare system an estimated $117 billion annually, according to research published in Progress in Cardiovascular Diseases.
Sedentary behavior is linked to increased risk across nearly every major health outcome:
- Cardiovascular disease and stroke
- Type 2 diabetes and metabolic syndrome
- Certain cancers, including colon and breast cancer
- Depression and anxiety disorders
- All-cause mortality—meaning earlier death from any cause
Yet current public health messaging still treats movement like an optional wellness upgrade rather than addressing systemic inactivity as the actual threat.
NEAT: The Movement Modern Life Erased
Exercise physiologist Brady Holmer’s contribution to Easter’s argument centers on Non-Exercise Activity Thermogenesis—or NEAT.
NEAT refers to calories burned through incidental daily movement: walking to destinations, standing while working, fidgeting, cooking, cleaning, playing with children.
Research shows NEAT can account for hundreds of additional calories burned daily—sometimes more metabolic impact than a single gym session.
But modern environments systematically eliminate NEAT opportunities at every turn.
We’ve engineered movement out of existence through cars, desk jobs, food delivery apps, and screen-based entertainment that keeps us motionless for hours.
How Modern Convenience Became Toxic
Consider how dramatically daily life has changed in just a few generations:
- Transportation: Walking or cycling to destinations replaced by sitting in cars
- Work: Physical labor jobs replaced by desk-based computer work
- Food acquisition: Hunting, gathering, farming replaced by drive-throughs and delivery apps
- Entertainment: Active play and social activities replaced by passive screen time
- Household tasks: Manual chores replaced by automated appliances
Each “convenience” removed opportunities for movement that humans performed daily for millennia.
The result? According to CDC data, only 23% of Americans get enough aerobic and muscle-strengthening exercise combined—meaning 77% are living in a state of chronic under-movement.
Practical Implications: Rethinking Movement Strategy
Easter’s poison framework suggests radically different approaches to solving the inactivity crisis.
Instead of guilting people into hour-long gym sessions they’ll never maintain, public health efforts should focus on re-engineering environments to make movement unavoidable.
Small Changes With Outsized Impact
When inactivity is the enemy rather than insufficient exercise, incremental movement becomes genuinely meaningful:
- Standing desks or walking meetings at work
- Parking farther away from destinations
- Taking stairs instead of elevators
- Walking while taking phone calls
- Preparing meals from scratch instead of ordering delivery
- Playing actively with children or pets
- Gardening, cleaning, or DIY projects instead of hiring services
These aren’t substitutes for structured exercise—they’re antidotes to poison.
They restore baseline movement expectations human physiology evolved requiring.
Psychological Benefits of Reframing
Framing also affects motivation and mental health.
When someone who can’t commit to gym memberships hears “exercise is medicine,” they often feel like failures for not taking their prescribed dose. Guilt and shame rarely produce lasting behavior change.
But when that same person hears “inactivity is poison,” suddenly a 10-minute walk becomes a meaningful act of harm reduction rather than an insufficient attempt at an impossible standard.
Lower psychological barriers mean more people actually start moving—and keep moving.
Beyond Personal Responsibility: Systemic Solutions
Easter’s argument also indicts broader systems that engineered inactivity into modern life.
Individual willpower can’t overcome environments deliberately designed to eliminate movement. Real solutions require systemic changes:
- Urban planning that prioritizes walkability over car dependence
- Workplace policies encouraging standing, walking meetings, and activity breaks
- School design incorporating movement throughout the day, not just PE class
- Architecture making stairs accessible and appealing compared to elevators
- Technology that prompts movement rather than endless scrolling
These interventions treat inactivity like other environmental toxins—requiring regulation, infrastructure investment, and cultural shifts.
The Takeaway: Movement Is Your Birthright, Not Medicine
Michael Easter’s reframe offers something powerful: permission to reject the medicalized, commercialized exercise culture that makes movement feel abnormal.
Humans are supposed to move constantly throughout each day. We evolved for it. Our bodies expect it.
Modern environments stole that birthright and replaced it with poisonous stillness—then sold gym memberships as the cure.
The real solution isn’t optimizing workout splits or hitting step count goals. It’s recognizing that every hour spent motionless is an hour exposed to a slow-acting toxin—and responding accordingly.
Walk to the store. Stand at your desk. Take the stairs. Play with your kids. Garden. Cook. Clean.
Not because you’re trying to earn health—but because you’re actively avoiding poison.
