Huberman’s 10 Protocols for Peak Performance: What the DOAC Episode Actually Said
By Eathan Janney, PhD
On September 3, 2026, Stanford neuroscientist Andrew Huberman appeared on The Diary of a CEO with Steven Bartlett to discuss his long-awaited book, Protocols: An Operating Manual for the Human Body. The episode ran two hours and covered everything from cortisol curves to cold exposure to GLP-1 drugs and psychedelics.
What made this episode different from the typical Huberman content is the tight curation: he arrived with 10 protocols he personally uses daily — drawn from the book’s 50+ protocols across 7 domains — that he believes will “move the needle the most” for mental health, physical health, and performance. All 10 are zero-cost or existing-budget. He does 9 of them every single day without exception.
This article breaks down all 10, explains the mechanism behind each, and — where relevant — shows how they integrate with the NGD approach to performance optimization.
The Cortisol Architecture Framing Everything
Before getting to the protocols themselves, Huberman drew a curve on a whiteboard that provides the conceptual frame for the entire system.
The horizontal axis represents your day. The vertical axis represents cortisol levels. The healthy pattern looks like this: a sharp peak in the first 60 minutes of waking — the cortisol awakening response — followed by a sustained decline through the day, ending in low nighttime cortisol that enables deep, restorative sleep.
Most people have this inverted: flat or low morning cortisol, elevated afternoon and nighttime cortisol. The consequences are significant — reduced lifespan, impaired illness recovery, disrupted sleep, and prolonged stress responses that compound throughout the day.
Here’s the critical insight Huberman emphasized: the morning cortisol peak sets up the nighttime trough. If you get the peak right, the trough follows. Every protocol in his system is designed to optimize this curve — either spiking morning cortisol appropriately, or suppressing afternoon/evening cortisol. They interlock. They “ratchet together,” as he put it.
This is not abstract. Your Garmin’s stress score, HRV, and body battery data are measuring the downstream consequences of this curve in real time.
The 10 Protocols
Protocol 1: Hydrate
What Huberman said: Immediately upon waking, drink water — 16 to 32 ounces — ideally with a pinch of salt for electrolytes. Hydration has a direct measurable effect on mental sharpness and actively supports the morning cortisol peak. The act of emptying the bladder and rehydrating triggers a physiological cascade that increases alertness.
The mechanism: Dehydration — even mild dehydration of 1–2% of body weight — measurably impairs working memory, attention, and reaction time. The brain is 75% water. Rehydration after sleep restores the electrochemical gradients that neuronal signaling depends on.
NGD application: This is the simplest protocol with the lowest barrier to implementation. If a client is starting with zero morning routine, this is day one. It’s also directly visible in HRV data — well-hydrated clients show more consistent morning HRV readings.
Protocol 2: Morning Sunlight (Get Outside Within 30–60 Minutes of Waking)
What Huberman said: Get outside within the first 30 to 60 minutes of waking and expose your eyes — not staring directly at the sun, but looking in its direction — to natural light for 5 to 10 minutes (longer on cloudy days). This is non-negotiable for him. On overcast days, he extends the time to 15–20 minutes. The goal is photons hitting the retina to trigger the suprachiasmatic nucleus.
The mechanism: Morning light exposure — specifically the low solar angle light containing a high proportion of blue-spectrum photons — activates intrinsically photosensitive retinal ganglion cells (ipRGCs) that project directly to the suprachiasmatic nucleus (SCN), the brain’s master circadian clock. This triggers the cortisol awakening response, sets the 12–16 hour timer for melatonin onset, and calibrates the circadian system that governs alertness, sleep timing, metabolism, and hormonal rhythm.
The critical detail: This only works with real outdoor light. Light through a window is insufficient — glass filters the wavelengths that activate the ipRGC pathway. Artificial blue-light panels have some effect but are significantly less potent than real outdoor light.
NGD application: Morning light is one of the most powerful single interventions available at zero cost. For executives who feel perpetually jetlagged despite not traveling, disrupted circadian rhythm from irregular indoor-only mornings is frequently the primary driver. We track the downstream signal via sleep onset time and sleep score — clients who implement morning light consistently see measurable sleep score improvement within 7–14 days.
Protocol 3: Delay Caffeine 90–120 Minutes After Waking
What Huberman said: Wait 90 to 120 minutes after waking before consuming caffeine. The reason: adenosine — the sleepiness molecule that builds up during waking hours — is still elevated in the first 90 minutes post-wake, even if you feel alert. Caffeine works by blocking adenosine receptors, not by eliminating adenosine. If you consume caffeine immediately, you block adenosine but it continues to accumulate; when the caffeine wears off, the adenosine crashes in, producing the notorious afternoon energy slump. Delaying caffeine allows adenosine to clear naturally first, producing more sustained alertness.
The mechanism: Adenosine is a byproduct of ATP metabolism — every unit of cellular energy consumed produces adenosine. During sleep, adenosine is cleared by the glymphatic system. Upon waking, residual adenosine lingers. Caffeine’s mechanism is competitive antagonism at adenosine A1 and A2A receptors. Delaying this antagonism preserves the natural cortisol awakening response from being blunted and prevents the rebound crash.
The one exception: Huberman notes that if you’re exercising first thing in the morning, caffeine before exercise is fine — the exercise itself handles adenosine clearance.
NGD application: This is one of the most commonly violated protocols among high-performing executives. The “I can’t function without coffee immediately” pattern is largely a dependency artifact — the body has learned to expect caffeine to handle early adenosine rather than clearing it naturally. A 2-week protocol shift usually resolves this, with clients reporting more stable energy and notably reduced afternoon crashes.
Protocol 4: Deliberate Cold Exposure and Stress Tolerance
What Huberman said: Cold showers or cold immersion — 1 to 3 minutes of uncomfortably cold (not dangerously cold) water — produce a significant spike in adrenaline (epinephrine) and noradrenaline (norepinephrine), as well as dopamine. The dopamine elevation from cold exposure is particularly notable: it rises significantly and, unlike drug-induced dopamine spikes, the elevation is sustained for 2–4 hours rather than spiking and crashing. But Huberman emphasizes the behavioral value equally: the act of voluntarily tolerating discomfort — choosing to stay in the cold when the mind is screaming to exit — is training a neural circuit for stress tolerance that generalizes to non-physical stressors.
The mechanism: Cold exposure activates the locus coeruleus — the brain’s primary noradrenaline hub — producing a system-wide alerting response. Simultaneously, it triggers a sustained dopamine release via a pathway distinct from drug-induced reward. The deliberate element matters neurologically: choosing to remain in a stressor your mind wants to escape strengthens the prefrontal cortex circuits responsible for impulse control and stress regulation — the same circuits that determine how you respond to a difficult board meeting or a losing trade.
NGD application: Cold exposure is in the NGD protocol for its dual function: neurochemical priming AND behavioral stress tolerance training. We track the HRV impact — cold exposure produces measurable acute HRV elevation in responsive clients, which is visible in same-morning data.
Protocol 5: Exercise (Specifically: Resistance Training + Zone 2 Cardio)
What Huberman said: Exercise is essential, but the composition matters. His protocol includes resistance training (weights) and Zone 2 cardiovascular work. He emphasized Zone 2 specifically — sustained aerobic exercise at a pace where you can hold a conversation — as the highest-leverage single exercise mode for long-term cardiovascular health, cognitive function, and stress resilience. He trains resistance 3–4x per week and does Zone 2 cardio 2–3x per week.
The mechanism: Resistance training produces anabolic hormonal responses (testosterone, IGF-1), maintains muscle mass critical for longevity and metabolic health, and produces acute BDNF elevation supporting neuroplasticity. Zone 2 cardio increases mitochondrial density, improves VO2max, elevates vagal tone (HRV), and produces the most robust BDNF response of any exercise mode. The combination addresses both the structural (muscle) and functional (cardiovascular/neurological) components of performance longevity.
NGD application: This maps directly to our keystone habit framework — exercise is the primary keystone candidate for the majority of NGD clients. The HRV impact of consistent Zone 2 cardio is among the most measurable cascade effects we track: 6–10 weeks of 2x weekly Zone 2 typically produces 8–15% HRV improvement from baseline.
Protocol 6: Optimize Your Work Blocks (90-Minute Focus Cycles)
What Huberman said: Structure deep work into 90-minute blocks, aligned with the brain’s ultradian rhythm. The first 5–15 minutes of any focused work session will feel difficult — this is neurologically normal, not a sign that you can’t focus. Resist the urge to task-switch in this window. Once the prefrontal circuits are engaged and attention has locked in, the session becomes significantly easier. He also emphasized eliminating visual distractions: peripheral movement detection is evolutionarily hardwired to pull attention, which means an open-plan office or visible phone is neurologically incompatible with deep work.
The mechanism: The brain operates on roughly 90-minute ultradian cycles across sleep and waking states. During the active phase of each cycle, noradrenaline and acetylcholine are elevated, supporting focused attention. The first 5–15 minutes of a focus block is the “activation energy” phase — the PFC is ramping up, and it requires deliberate suppression of the default mode network (DMN). Once this transition is complete, the focus state is stable and self-sustaining. Interruptions force a restart of this cycle.
NGD application: We use this framework to structure client work schedules in the 90-Day program — identifying the 1–2 peak ultradian windows daily and protecting them for the highest-value cognitive work.
Protocol 7: Non-Sleep Deep Rest (NSDR) — The Afternoon Reset
What Huberman said: NSDR — a 10 to 20-minute deliberately induced state of deep relaxation (yoga nidra is one protocol; his own guided audio is another) — is one of the most underutilized performance tools available. Done in the early-to-mid afternoon, it shifts the autonomic nervous system from sympathetic to parasympathetic, restores dopamine levels in the striatum, and accelerates the restoration of cognitive function comparable to a 90-minute nap — without the sleep inertia. He does this daily. It’s the protocol he considers most underrated.
The mechanism: NSDR activates the parasympathetic nervous system via controlled breath-rate slowing and muscle relaxation, producing a reduction in cortisol and a restoration of neurotransmitter tone — particularly dopamine in the basal ganglia, which depletes during sustained effort. A 2019 study from the Weizmann Institute found that a NSDR-like rest protocol immediately after learning produced learning consolidation rates comparable to a full sleep period.
NGD application: NSDR is one of the most immediately actionable protocols for executive clients who cannot nap. A 10-minute NSDR between sessions or after a demanding morning block produces measurable HRV recovery visible in afternoon wearable data.
Protocol 8: Physiological Sigh for Real-Time Stress Management
What Huberman said: The physiological sigh — a double inhale through the nose followed by a long exhale through the mouth — is the fastest known way to shift the autonomic nervous system from sympathetic (stressed/activated) to parasympathetic (calm/recovered). A single repetition produces a measurable shift within 30 seconds. It works because the extended exhale activates the vagus nerve, which directly suppresses sympathetic activation. He uses this throughout the day whenever he notices stress escalating.
The mechanism: Exhalation activates the vagus nerve, which innervates the heart and increases the gap between heartbeats — a direct HRV elevation. The double inhale fully reinflates the alveoli (the tiny air sacs in the lungs that partially collapse during normal breathing), maximizing the surface area for gas exchange and maximizing the impact of the subsequent slow exhale on vagal activation.
NGD application: We teach this in session and track its impact via HRV. For clients with significant stress loads, the physiological sigh is the most immediate tool available between meetings. The measurable HRV spike from a single sigh series is visible in Garmin real-time stress data.
Protocol 9: Limit Light Exposure After 10pm
What Huberman said: After 10pm, dim all lights in your environment. Overhead lights and screens at full brightness after 10pm suppress melatonin release via the same ipRGC pathway that morning light activates. Even brief bright-light exposure between 11pm and 4am activates the habenula — a brain structure involved in mood regulation — in ways that suppress dopamine circuits and increase depression risk. He automates this: smart bulbs on schedules, phone brightness reduced, blue-light filter on.
The mechanism: The habenula finding is particularly striking — a 2022 study in Nature Neuroscience found that even low-level light exposure during the biological night activates habenular circuits that suppress dopamine tone and increase anxiety and depression scores. This is distinct from the sleep-disruption effect. The implication: artificial light after 10pm isn’t just disrupting your sleep — it’s affecting your mood and motivation the following day.
NGD application: Evening light environment is a primary intervention in our sleep architecture protocol. We track the downstream signal via sleep onset latency and deep sleep minutes. Clients who automate light reduction (versus relying on willpower at 11pm) consistently show better compliance and measurably better sleep architecture scores.
Protocol 10: Prioritize Sleep Architecture (Not Just Duration)
What Huberman said: Duration matters, but architecture matters more. He aims for 6.5 to 8 hours with consistent bed and wake times (±30 minutes). The mechanisms he emphasized: temperature is the primary sleep onset driver — the body needs to drop 1–3°F to initiate sleep, which is why a cool room (65–68°F) dramatically accelerates sleep onset. Alcohol is a sleep architecture disruptor even at small doses — it suppresses REM sleep and produces rebound wakefulness in the second half of the night. He does not consume alcohol.
The mechanism: Sleep architecture — the ratio and sequencing of NREM stages and REM — determines whether sleep is actually restorative. Slow-wave sleep (NREM stage 3) is when growth hormone is secreted, cortisol is cleared, and procedural memories (including habit encoding) are consolidated. REM sleep is when emotional regulation and contextual memory integration occur. Both are disrupted by alcohol, late light exposure, irregular sleep timing, and elevated nighttime cortisol — all of which feed back into the protocols that precede this one.
NGD application: Sleep quality is the most directly measurable variable in our entire program. The Garmin sleep score and HRV morning average together provide a daily readout of sleep architecture quality. We treat chronically low sleep scores (<65) as an emergency flag that supersedes other optimization work — nothing else is worth pursuing until sleep is repaired.
The System View: Why This Isn’t a List
Huberman was explicit about this: these aren’t 10 independent tips. They’re gears in a system. The morning cortisol peak (sunlight, hydration, cold exposure) enables sustained focus capacity (Protocol 6). The afternoon NSDR (Protocol 7) restores the dopamine and autonomic resources needed for a productive evening wind-down. The evening light reduction (Protocol 9) sets up the sleep architecture (Protocol 10) that determines whether the cortisol awakening response is robust the next morning.
Violate one gear, and the whole system degrades. Fix one gear, and adjacent ones often improve on their own — which is exactly the logic behind the keystone habit model.
The difference between someone who “knows all this stuff” and someone who actually performs at the level this system enables is not information. It’s implementation infrastructure.
That’s the gap NGD exists to close.
Where to Go From Here
If you want to start applying these protocols and actually make them stick — not as a 30-day experiment but as a permanent operating system — the 90-Day Crash Course is built around exactly that. We identify which of these protocols will produce the highest downstream leverage for your specific biology and schedule, build the implementation infrastructure to ensure they encode, and use your biometric data (HRV, sleep score, body battery, stress levels) to track whether the system is actually working.
The protocols are the what. The implementation is the how. That’s where most people get stuck — and where we come in.
Eathan Janney, PhD is the founder of NeuroGenerative Dynamics. Source: Andrew Huberman on The Diary of a CEO with Steven Bartlett, September 3, 2026. Book: Protocols: An Operating Manual for the Human Body by Andrew Huberman (Simon & Schuster, 2026).