AMA #14: Evening Routines, Light Therapy, Health Metrics & More
Summary
In this live AMA session, Andrew Huberman answers Premium channel member questions covering a range of health topics including evening light routines, red light therapy, sleep protocols, resistance training strategies, and personal fitness metrics. He also shares details about the research philanthropy funded through the Premium channel in 2023.
Key Takeaways
- Evening sunlight exposure (5–10 minutes before sunset) can offset melatonin suppression from artificial light by approximately 50%
- Switching to red light bulbs in the evening eliminates stimulating blue wavelengths and can reduce the cortisol spike associated with nighttime light exposure
- Your phone can be set to a red-only color filter using the Accessibility → Color Filters function, activated via a triple-click shortcut — at zero cost
- Red light therapy (650–800nm wavelengths, ~18 inches away) viewed in the morning may offset age-related mitochondrial decline in vision for people over 40
- For waking in the middle of the night, avoid looking at the clock, use long exhale breathing, NSDR (Non-Sleep Deep Rest), or the Reveri hypnosis app
- Resistance training for strength without hypertrophy should focus on 1–3 rep ranges with heavy loads and longer rest periods
- Blood work every 6 months and tracking resting pulse rate are the core medical metrics Huberman recommends
- Cardiovascular fitness should be structured across three weekly session types: long slow endurance, moderate sustained effort (~35 min), and short high-intensity intervals (~12 min)
- Anterior mid-cingulate cortex grows when you regularly engage in tasks you find difficult but choose to do anyway — a key structure for willpower and cognitive longevity
Detailed Notes
2023 Research Philanthropy
Premium channel funds (with dollar-for-dollar matching from the Tiny Foundation) were directed to:
- Dr. Alia Crum (Stanford) — mindset effects on mental and physical health in children and adults
- Dr. Satchin Panda (Salk Institute) — intermittent fasting as a tool for improving mental health
- Dr. Carla Shatz (Stanford) — maternal infections, fetal brain development, and stem cell research
- Dr. Joanna Steinglass (Columbia) — novel neuroscience-based treatments for eating disorders, including anorexia nervosa
- Dr. Nolan Williams (Stanford) — transcranial magnetic stimulation (TMS) combined with psychedelics (ibogaine, psilocybin) for depression and PTSD
- A chronobiology conference, enabling graduate students and postdocs to attend who otherwise couldn’t
In 2024, three donors (including Tiny Foundation) will each provide a dollar-for-dollar match, effectively creating a 3:1 funding multiplier.
Anterior Mid-Cingulate Cortex & Willpower
- This brain region grows when you engage in challenges you’d prefer to avoid but push through anyway
- It atrophies in people who consistently avoid hard tasks
- It is associated with “superagers” — individuals who maintain strong cognitive function late in life
- Effective stimuli include: difficult physical exercise, hard conversations, language learning, or any uncomfortable-but-safe challenge
- Even 5 minutes per day of leaning into something difficult may be sufficient to stimulate this region
Evening Light Routine
Why it matters:
- Bright light (15+ seconds) between 10 PM and 4 AM can dramatically suppress melatonin
- Viewing sunlight in the late afternoon/evening reduces the retina’s sensitivity to nighttime artificial light
Practical Protocol:
- Remove sunglasses for 5–10 minutes in the late afternoon to get natural light exposure
- Dim overhead lights in the evening; position light sources low rather than overhead
- Switch to red light bulbs (e.g., Bon Charge brand — dimmable, correct wavelength) in bedroom or living spaces during the final hour before sleep
- Triple-click phone shortcut: Go to Accessibility → Color Filters → drag down blues, then assign triple-click to toggle on/off
- Blue light filter glasses are an additional option for evening screen use
Morning Light & Light Therapy
Morning sunlight:
- Get outside as soon as possible after waking
- If waking before sunrise: turn on bright artificial overhead lights
- 10,000 Lux light panels can substitute (use for 5–10 minutes; overuse may cause headaches)
- Overcast conditions: still go outside — relevant wavelengths penetrate cloud cover
Red light therapy (morning use):
- Wavelengths: 650–800 nanometers (red and near-infrared)
- Recommended device: Joovv (medical-grade, correct wavelengths)
- Distance: ~12–18 inches; blinking is fine, never force your eyes open
- For people over 40: morning red light exposure may offset mitochondrial decline in vision (based on research from Glen Jeffery’s lab at UCL)
- Does not replicate the cortisol/adrenaline/dopamine wake-up signal of sunlight
Waking in the Middle of the Night
Behavioral tools:
- Long exhale breathing (extends exhale longer than inhale)
- Progressive body relaxation; relax the face and jaw deliberately
- Do not look at the clock — it typically makes falling back asleep harder
- Do not start scrolling social media
Apps & protocols:
- Reveri app — self-directed hypnosis for falling back asleep; practice during the day first; ~8 minutes; no verbal interaction version available
- NSDR / Yoga Nidra — free on YouTube (search “NSDR Huberman”); builds the skill of self-directed relaxation
- Reveri costs ~$7–8/month; NSDR is free
Supplement considerations:
- Theanine (part of the sleep stack with magnesium L-threonate and apigenin) can cause vivid dreams in some people, leading to waking — reduce or eliminate dose if this occurs
- Melatonin: often taken in too-high doses and too frequently; best reserved for jet lag and acute situations; long-term nightly use not recommended
- Inositol (900 mg): an alternative or addition for those who wake mid-sleep
Health & Fitness Metrics
Weekly training structure:
| Session | Frequency | Details |
|---|---|---|
| Long slow cardio | 1x/week | 60–90 min jog, hike, or weighted vest walk |
| Moderate sustained cardio | 1x/week | ~35 min at a conversational-limit pace |
| High-intensity intervals | 1x/week | ~12 min total; 20s on/10s off or 1 min on/1 min off |
| Legs (resistance) | 1x/week | Quads, hamstrings, calves |
| Torso (resistance) | 1x/week | Push, pull, neck |
| Small muscle groups | 1x/week | Biceps, triceps, rear delts, abs |
Readiness-based goal: Ability to sprint for a plane, go on a 5–10 mile hike, carry heavy furniture, and move with agility — not aesthetics or competition.
Medical monitoring:
- Blood work every 6 months
- Resting pulse rate monitored each morning — elevated rate signals need to reduce intensity
- Eye exam annually, including glaucoma test (air puff) — glaucoma is the second leading cause of blindness worldwide
- Charting workout intensity (1–10 scale) on a calendar to track trends
- Subjective well-being (sleep quality, energy, recovery) treated as valid metrics
Full body MRI scans:
- Informative but not medically necessary; can reveal benign findings that create anxiety
- Cost: ~$2,000+
- Consideration: be psychologically prepared for unexpected findings that may or may not require intervention
Strength Training Without Hypertrophy
- Key principle: Hypertrophy is primarily stimulated in