How to Manage Stress: The Science That Actually Works
The Huberman Lab with Andrew Huberman | March 27, 2026
How to Manage Stress and Anxiety: The Neuroscientist’s Toolkit for a Calmer Life
Here’s something most stress advice gets completely wrong: it treats stress like an enemy to be eliminated. Something ancient and broken, a leftover from when humans had to run from predators, now hopelessly misfiring in response to emails and deadlines.
That framing is not just inaccurate — it’s actively making you worse at handling stress.
According to Andrew Huberman, professor of neurobiology and ophthalmology at Stanford School of Medicine, stress is a generic, powerful, and in many cases valuable system built into your body. The problem isn’t that you have it. The problem is that most people have never been given the tools to work with it — to turn it on strategically, modulate it in the moment, and switch it off when the moment has passed.
Knowing how to manage stress and anxiety isn’t about becoming calmer by nature. It’s about understanding the machinery well enough to operate it deliberately. And when you learn to do that, something remarkable happens: your capacity for happiness stops being held hostage by a system you never learned to drive.
This is Part 2 of Podomline’s How to Be Happy series. In Part 1, we explored how the dopamine system becomes distorted by modern life and why that’s often the hidden root of feeling unmotivated and flat. In this post, we go one layer deeper — into the stress system that sits underneath every emotion you experience, and the specific, biology-based tools that give you real control over it.
Let’s get into the science.
Table of Contents
What Stress Actually Is (The Definition Most People Get Wrong)
Most people think of stress as a psychological event — something that happens in the mind when too much is demanded of it. But that’s only half the picture, and arguably the less useful half.
Huberman’s definition is more precise: stress is a generic mobilization system. It was not specifically designed for tiger attacks, financial pressure, or relationship conflict. It’s a system built to activate your brain and body in response to any demand — physical, psychological, bacterial, social. It does not distinguish between them. And that’s actually what makes it so powerful — and so controllable.
The stress response does two things simultaneously. It activates certain systems (heart, muscles, immune response, focused cognition) and deliberately shuts down others (digestion, reproduction, salivation). It primes you to do something. That’s its entire purpose. Not to punish you. Not to malfunction. To make you move.
Understanding this reframes everything. Stress isn’t a character flaw or a broken evolutionary artifact. It’s a system with levers — and this post is about where those levers are.
How the Stress Response Works in Your Body
When something stresses you out — whether you’re giving a presentation, receiving bad news, or just running late — a chain of neurons running from your neck to your navel (the sympathetic chain ganglia) activates almost instantly. These neurons release a neurochemical called acetylcholine, which in turn triggers the release of epinephrine — what most people call adrenaline.
From there, adrenaline does two distinct jobs at once:
- It dilates blood vessels in muscles, the heart, and areas needed for action — rushing blood where movement happens
- It constricts blood vessels in systems you don’t need right now — digestion, reproduction, salivation
Your throat goes dry. Your heart rate climbs. You feel the urge to move or talk. That’s not anxiety — that’s adrenaline doing exactly what it was designed to do.
The opposing system — the one designed for calm — is called the parasympathetic nervous system. It runs through a different set of pathways: up through the brainstem and into the face, eyes, tongue, and jaw, and also into the pelvic region. Critically, it has entry points you can activate deliberately — through breathing, gaze, and other tools. This is where the real leverage lives.
The stress system knows how to turn itself on. What most of us were never taught is how to turn it off. — Paraphrased from Andrew Huberman, Stanford School of Medicine
The Three Timescales of Stress: Short, Medium, and Long
One of Huberman’s most clarifying contributions is the distinction between stress operating on different timescales — because the science, and the tools, are completely different for each.
Timescale | Duration | Effect on Body | What It’s Good For |
|---|---|---|---|
Acute (short-term) | Minutes to hours | Adrenaline spike, immune activation, sharpened focus | Fighting infection, meeting deadlines, peak performance |
Medium-term | Days to weeks | Stress threshold tested, capacity either grows or depletes | Resilience-building when managed correctly |
Chronic (long-term) | Weeks to months | Elevated cortisol, shrinking hippocampus, heart disease risk, disrupted sleep | Nothing good — requires active intervention |
The popular narrative that “all stress is bad” ignores the first row of that table entirely. Short-term stress is actually good for your immune system. When adrenaline spikes, it signals your spleen and lymphatic system to deploy immune cells. A study published in the Proceedings of the National Academy of Sciences showed that participants who performed a deliberate rapid-breathing protocol before being injected with a bacteria-mimicking substance experienced dramatically fewer symptoms than the control group — because the adrenaline response had primed their immune system to fight back.
Huberman notes a familiar pattern: work, work, work — and then, the moment you finally relax on vacation, you get sick. That’s not coincidence. It’s what happens when the adrenaline response crashes and your immune activity crashes with it.
The goal is not to eliminate stress. It’s to make it work for you in the short term, build your capacity for it in the medium term, and prevent it from becoming chronic in the long term. Each of those requires a specific tool.
Tool #1: The Physiological Sigh — The Fastest Way to Calm Down
What it is
The physiological sigh is a double inhale followed by a long exhale — and according to Huberman, it’s the fastest, most thoroughly validated real-time stress reduction technique available to any human being without equipment, medication, or training.
Here’s the biology behind why it works.
When you inhale, your diaphragm moves down, your lungs expand, your heart has slightly more physical space — and the blood moving through it slows down slightly. Neurons in the heart called the sinoatrial node detect that slower blood flow and send a signal to the brain, which responds by speeding the heart up. Result: inhaling increases heart rate.
The reverse is also true. When you exhale, the diaphragm moves up, the heart compresses slightly, blood moves faster, the sinoatrial node detects it, and the brain slows the heart down. Exhaling decreases heart rate.
This means: longer exhales = slower heart rate = activation of the parasympathetic (calming) system. That relationship is hardwired into your body. It exists regardless of how stressed you are, what the stressor is, or how practiced you are at relaxation.
Why the double inhale matters
When we’re stressed, the tiny air sacs in our lungs (alveoli) begin to collapse, and carbon dioxide accumulates in the bloodstream. That CO₂ buildup contributes to the jittery, agitated feeling of stress. A single deep inhale can’t fully reinflate those collapsed sacs.
The double inhale — a full breath in, then a short “sneak” of extra air — reinflates them. And then the long exhale that follows is far more effective at clearing carbon dioxide from the system, producing a rapid calming effect that a standard breath simply can’t match.
How to do it
- Take a full inhale through the nose
- At the top of that inhale, take a short second sniff to top up the lungs
- Exhale slowly and fully through the mouth
- Repeat one to three times
One to three repetitions is enough to measurably reduce the stress response. If you repeat for 10 to 15 cycles, some people find it relaxing enough to fall asleep.
One important note: your heart rate won’t drop immediately. It takes 20 to 30 seconds to come down after the breath. Don’t interpret the delay as the tool not working. Wait for it.
Tool #2: Raising Your Stress Threshold for Medium-Term Resilience
Real-time tools solve in-the-moment spikes. But what about those weeks where you’re running near your limit — where every small thing lands harder than it should because you’re already close to threshold?
That calls for a different approach: deliberately exposing yourself to controlled doses of stress and practicing staying mentally calm while your body is activated.
The mechanism works like this. Your ability to handle pressure isn’t just psychological — it’s physiological. When your heart is pounding, your muscles are burning, and your system is flooded with adrenaline, your prefrontal cortex (the rational, executive part of the brain) tends to go offline. The emotional brain takes over. You react instead of respond.
Training your stress threshold means practicing the deliberate act of keeping your mind calm while your body is in full activation — and doing it regularly enough that the threshold shifts. What once felt overwhelming starts to feel manageable.
Practical methods
- High-intensity exercise: Push to 80–90% of your maximum output, then actively practice calming the mind while the body continues to work hard. Don’t fight the discomfort — learn to inhabit it calmly.
- Cold exposure: A cold shower or brief cold immersion spikes adrenaline deliberately. The practice is not to white-knuckle through it — it’s to consciously slow the breath and calm the mind while the adrenaline is still high.
- Deliberate breathwork (cyclic hyperventilation): 25–30 rapid deep inhales and exhales, then a long exhale hold. Repeated two to four rounds. This deliberately liberates adrenaline — which then provides an opportunity to practice calming down from an activated state.
Important safety note from Huberman: Never perform breath holds near water. Never do rapid breathing cycles while driving. If you have eye pressure issues, glaucoma, or pulmonary concerns, consult your physician before attempting any breath hold protocol.
This kind of training is not about suffering for its own sake. It’s about raising your baseline capacity. People who do this consistently report that their stress threshold noticeably increases — meaning more of life fits inside what’s manageable before they feel overwhelmed. This same principle is at the heart of rewiring the brain’s response to pressure.
Tool #3: Panoramic Vision — The Real-Time Mind-Body Disconnect
Here’s a tool that’s almost unknown outside of neuroscience and sports performance circles.
When the stress response activates, your pupils dilate and your vision narrows. You develop tunnel vision — literally. You stop seeing the peripheral environment and focus tightly on the perceived threat. That visual narrowing feeds back into the neural circuits of alertness, reinforcing the stress state.
The reverse is also true. Deliberately broadening your gaze — softening your focus and taking in a wider field of vision — activates a circuit in the brainstem that reduces the alertness signal. Huberman calls this panoramic vision, and it has a measurable calming effect on the nervous system without requiring you to stop doing what you’re doing.
How to use it
You don’t need to move your head. Simply relax your focus — rather than fixing on a specific point in front of you, allow your awareness to expand outward so you can perceive more of your environment at once. Think of it as the opposite of staring.
Done during high-intensity exercise, it allows the mind to remain calm while the body is in full output. Done during a difficult conversation or high-stakes meeting, it creates a small but real reduction in the stress-driven activation that makes it hard to listen rather than react.
Like the physiological sigh, this requires no equipment, no practice, and no pause in what you’re doing. It’s a real-time lever with a real biological mechanism behind it.
Tool #4: Social Connection and the Tachykinin Warning
For chronic stress — stress that persists over weeks and months — short-term tools are not enough. The research points clearly in one direction: the quality of your social connections is the most powerful long-term buffer against chronic stress.
Huberman explains the mechanism through two neurochemicals most people have never heard of working together.
Serotonin is released in the brain when we see someone we recognize and trust. It creates feelings of contentment, safety, and sufficiency — a sense that what’s immediately around you is enough. It reinforces neural connections and has measurable positive effects on immune function. You don’t need romantic connection, deep friendship, or even human contact for this — attachment to an animal, a regular gathering, or something that reliably brings delight also triggers the serotonin response.
Tachykinin works in the opposite direction. When social isolation extends too long, tachykinin accumulates in the system. In studies across organisms from flies to mice to humans, elevated tachykinin is associated with increased fear, paranoia, and suppressed immune function. It’s the body’s internal punishment signal for isolation — a biological alarm that says: you are not spending enough time with people or things that matter to you.
Huberman keeps a post-it note above his desk that just says “tachykinin” — a reminder that no matter how goal-directed his work becomes, chronic isolation always has a physiological cost.
The practical implication is important: digital interaction does not fully substitute for real social connection. It’s not that social media or texting is useless, but the serotonin and tachykinin systems evolved in response to actual proximity and shared physical experience. This is one of the reasons isolation keeps people locked in stress cycles even when they feel “connected” online.
Tool #5: Supplements That the Research Actually Supports
Huberman is careful to position supplements as secondary tools — useful when behavioral strategies aren’t sufficient, not as replacements for them. He references three that have meaningful research behind them.
L-Theanine
An amino acid found naturally in green tea. At 100–200mg taken 30 to 60 minutes before sleep, it increases GABA (an inhibitory neurotransmitter) and can help quiet the ruminating mind that prevents sleep onset. Huberman cites multiple studies showing it reduces anxiety, lowers task-completion stress, and has a notable calming effect during periods of chronic stress. Some people use a lower dose in the late afternoon during particularly stressful periods.
Ashwagandha
An adaptogenic herb with a robust body of research. Huberman cites six clinical studies collectively showing a 14.5–27.9% reduction in cortisol in otherwise healthy but stressed adults. He uses it during high-stress periods, not year-round. It has also shown mild antidepressant effects in research, likely connected to its cortisol-lowering mechanism. Note: it can lower total cholesterol by up to 10%, which may or may not be desirable depending on your situation.
Melatonin (with caveats)
Huberman explicitly does not recommend melatonin as a stress supplement. He includes it to address a common misconception. Standard commercial doses (1–3mg) are far higher than what the body naturally produces, which can suppress cortisol and epinephrine production from the adrenal glands over time — creating what he describes as a pseudo-adrenal insufficiency in some cases. If you choose to use melatonin, lower doses and limited duration are important.
For all supplements: Huberman directs listeners to examine.com — a free, rigorously maintained database that links supplement research directly to PubMed studies and includes details on study populations and effect sizes. Not a sponsor — just a resource he trusts.
The Link Between Stress and Happiness
Here’s the thread that connects this post to the whole series.
Huberman offers a deceptively simple framework for understanding emotions: an emotion is your brain’s interpretation of whether your internal state matches the demands in front of you. If you’re activated and have work to do — that’s engagement. If you’re activated and need to fall asleep — that’s anxiety. If you’re calm and someone asks you to perform at peak — that’s sluggishness or procrastination.
The same internal state produces different emotional labels depending on context. Which means that managing your internal state is the foundation of managing your emotional life — including your capacity for happiness.
This is why we placed this post second in the series. You cannot reliably access gratitude, joy, or meaning from a nervous system in chronic overdrive. You cannot apply the happiness formula from Part 3 when your stress system is perpetually flooding your body with cortisol. The tools in this post are the operating system — without them running properly, the higher-level applications struggle to load.
Get the daily habits that build resilience from the ground up working first. Then the rest of this series clicks into place.
Your Action Plan: How to Manage Stress and Anxiety This Week
This Week: Foundation (Quick Wins)
- Learn the physiological sigh today. Practice it once right now — double inhale, long exhale — so it becomes automatic before you need it. The value of this tool is zero if you try to remember it in a moment of peak stress. Rehearse it in calm so it’s available in chaos.
- Identify your chronic stressor. Write down the single thing that’s been keeping your baseline elevated for more than two weeks. Not today’s stressor — the underlying one. Sleep disruption, a relationship, financial pressure, workload. Naming it is step one toward the long-term tools.
- Add one real social connection this week. Not a text. A phone call, a walk with someone, a shared meal. Your tachykinin system doesn’t care how many followers you have.
Daily Practice (The Core Habit)
The activation–calming cycle. Once per day, deliberately activate your stress system through exercise or cold exposure, then practice calming the mind while the body remains activated. This doesn’t need to be extreme — a brisk run where you practice panoramic vision and steady breathing is enough. You are training the decoupling of mental reactivity from physical activation. Over weeks, this meaningfully raises your stress threshold.
Long-Term: Sustainability
Huberman’s benchmark for whether stress has crossed from useful to harmful is simple: can you still achieve good sleep? The night you lie awake unable to turn your mind off is the night your acute stress has become medium-term. Multiple nights in a row is the signal to reach for the longer-horizon tools — social investment, ashwagandha if appropriate, and a hard look at what’s generating the sustained load.
Do not wait for burnout to decide the chronic stress needs to be addressed. By the time you feel depleted, the neurochemistry has already been working against you for weeks.
What’s Coming Next in the How to Be Happy Series
You’ve now built the foundation:
- Part 1 showed you why modern life distorts the dopamine system and how to reset it
- Part 2 (this post) gave you the neuroscience of stress and specific tools to operate it deliberately
Now we move from fixing the broken systems to actively building happiness:
- Part 3 — The Happiness Formula: What a Google X Engineer Learned After Losing Everything Mo Gawdat — former Chief Business Officer of Google X — lost his son and responded not with grief alone, but with a mathematical model of happiness he’d been building for years. It’s precise, testable, and genuinely life-changing in a way that’s rare in this space.
- Part 4 — What Harvard’s 86-Year Study Says About a Good Life The longest-running happiness study ever conducted followed participants from their teens to their 90s. The findings are counterintuitive, well-documented, and worth building your life around.
Sources & Further Reading
• Original Podcast Episode: Huberman Lab — “Tools for Managing Stress & Anxiety” with Andrew Huberman
• Researcher referenced: Lisa Feldman Barrett — How Emotions Are Made (Norton, 2017); Seven and a Half Lessons About the Brain (Mariner, 2021)
• Study referenced: Kox et al. (2014), “Voluntary activation of the sympathetic nervous system and attenuation of the innate immune response in humans” — Proceedings of the National Academy of Sciences
• Physiological sigh research: Jack Feldman Lab, UCLA; David Spiegel Lab, Stanford
• Supplement research resource: examine.com — free, PubMed-linked supplement database
• Ashwagandha research: Multiple studies cited by Huberman showing 14.5–27.9% cortisol reduction
• Books mentioned: Breath: The New Science of a Lost Art by James Nestor; Jaws by Sandra Kahn & Paul Ehrlich
Frequently Asked Questions About Stress and Anxiety
What is the fastest way to reduce stress in the moment?
According to Andrew Huberman of Stanford, the fastest hardwired method to reduce the stress response is the physiological sigh — a double inhale followed by a long exhale. The double inhale reinflates collapsed air sacs in the lungs and clears accumulated carbon dioxide; the extended exhale compresses the heart slightly, which triggers the parasympathetic nervous system to slow the heart rate. One to three repetitions are enough to measurably reduce the stress response, though heart rate takes 20–30 seconds to come down after the breath.
What does chronic stress actually do to your body?
Chronic stress keeps cortisol and adrenaline elevated over weeks and months. Research shows this is associated with reduced hippocampal volume (affecting memory), increased risk of heart disease through sustained vascular constriction, suppression of immune function, disrupted sleep, and worsening of pre-existing mental health conditions including depression, anxiety disorders, and PTSD. Huberman’s key benchmark for chronic stress crossing into dangerous territory is persistent sleep disruption — if stress is preventing quality sleep night after night, the system needs active intervention.
Is stress ever good for you?
Yes — substantially so in the short term. Andrew Huberman explains that acute stress activates the immune system by triggering the release of adrenaline, which deploys immune cells from the spleen and lymphatic system. It also sharpens cognition, narrows focus productively, and can act as the most effective natural nootropic available (the pressure of an impending deadline concentrates mental resources more powerfully than most supplements). The problem is not stress itself, but the inability to turn it off when the stressor has passed.
How does breathing actually control heart rate?
When you inhale, the diaphragm moves down, the heart expands slightly into the extra space, and blood flows more slowly through the enlarged chamber. Neurons in the heart (the sinoatrial node) detect this slowing and signal the brain to speed the heart up. When you exhale, the reverse happens — the heart compresses, blood flows faster, the brain receives the signal and slows the heart down. This means that exhale-emphasized breathing (where exhales are longer or more forceful than inhales) directly activates the parasympathetic nervous system and slows the heart rate. It’s a physiological lever, not a psychological one.
What supplements actually help with stress and anxiety?
Based on research Huberman cites, L-theanine (100–200mg) has demonstrated effects on relaxation, sleep quality, and stress reduction across multiple clinical studies. Ashwagandha has shown 14.5–27.9% reductions in cortisol across six studies in stressed but otherwise healthy adults. Both are best used during periods of elevated stress rather than continuously. Huberman recommends examine.com to review the PubMed-linked research on any supplement before use. He explicitly cautions against melatonin for stress management due to its potential to suppress adrenal output at standard commercial doses.
What is the physiological sigh and does it actually work?
The physiological sigh is a double inhale (a full breath in, followed immediately by a short extra sniff) followed by a long, full exhale. It’s something humans and animals do spontaneously when preparing to sleep, when recovering from crying, and when in oxygen-depleted environments. Research from Jack Feldman’s lab at UCLA and an ongoing collaboration between Huberman’s lab and David Spiegel’s lab at Stanford is studying its effects on stress and emotional state. The mechanism is well-established: the double inhale reinflates collapsed alveoli, the long exhale clears CO₂, and the cardiovascular response through the sinoatrial node triggers the parasympathetic calming system. Huberman describes it as the fastest and most thoroughly grounded real-time stress reduction tool available.
AUTHOR BIO
Written by the Podomline Editorial Team
The Podomline team specializes in translating insights from the world’s top podcasts into practical, evidence-based guides. With a focus on mind performance, body optimization, and financial growth to bring you content that goes beyond surface-level advice. We do not offer advice; all content is attributed to named expert sources and is intended for educational purposes only.
This is Part 2 of the Podomline “How to Be Happy” series. ← Part 1: How to Fix Your Dopamine | Continue reading: Part 3 → The Happiness Formula | Part 4 → What Harvard Found After 86 Years
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