LIVE EVENT Q&A: Dr. Andrew Huberman Question & Answer in Toronto, ON

Huberman describes this as one of the most exciting recent studies he encountered. The University of Texas Houston team found the soleus effect uniquely powerful because this muscle is architecturally designed for sustained low-intensity continuous use — unlike quadriceps or gastrocnemius, which are built for burst. The finding that the metabolic improvement persists 'around the clock' (not just during the exercise session) is the key clinical implication: a few hours of soleus activation appears to shift baseline metabolic state, not just momentary glucose use. Huberman personally uses a small under-desk fidget device to maintain the movement.

Huberman credits Peter Attia for consolidating the evidence on this specific prescription. He emphasizes that 'we don't fall and break our hips' is as important a longevity goal as cardiovascular health — the mobility component of the protocol targets the bone density and balance needed to prevent the falls that frequently mark the beginning of accelerated healthspan decline. He notes Toronto residents' natural walking culture with approval as an incidental source of zone 2 load.

Huberman explains the mechanism in detail: the pineal gland secretes melatonin in the dark; sunlight via the retina and cervical ganglia suppresses it. The duration of melatonin secretion is what the brain interprets as the season signal. Because the brain tracks day-over-day delta, not absolute duration, a slow continuous extension of morning light — even just a few extra minutes — can maintain the internal signal that days are stable or growing, preventing the cascade that produces depression symptoms. He uses the example: an 8-hour fall day triggers the melatonin-extending circuit, while an 8-hour spring day does not, because the spring day follows one that was even shorter.

Huberman describes himself as someone who 'goes into the trench and doesn't leave easily' — a hyper-focused, poor task-switcher by default. Space Time Bridging was developed as a tool to train the opposite skill. The practice draws on his VR laboratory research showing that stressful visual stimuli increase temporal frame rate (fine-slicing), and that relaxed far-field gaze decreases it. Moving deliberately from interoception to far-field gaze and back is essentially a voluntary frame-rate regulation exercise. He also notes that this phenomenon explains why Hitchcock's films manipulate perceived duration by layering near and far visual content within the same scene.

Huberman frames this in the context of unconscious processing: the best ideas do not come from deliberate searching but from the unconscious 'geysering up' when the linguistic narrative is turned off. He distinguishes awe (pure witnessing, passive, no personal relevance) from delight (witnessing something that links to your own history or wiring, creating an action impulse). Inspiration, he argues, is always delight — it requires the raw material of personal experience, which means the input must have been collected first. The earphone-free practice is the processing phase, not the input phase.

Huberman shares personal history: he was a 'wild teenager' who underwent involuntary therapy, which he initially hid. He frames the shift from reactive to responsive as a decades-long process, not a quick protocol. He connects the Paul Conti series directly to this: Conti's framework for self-care is not about massages and exercise but about managing the nervous system state that underlies emotional baseline. Huberman also notes the compounding problem of stress and sleep: stress disrupts sleep, and poor sleep makes the stress threshold even lower — a downward spiral that only consistent morning practices reliably interrupt.

Huberman notes that both MDMA and psilocybin increase neuroplasticity primarily through serotonin, but via different receptors, producing different plasticity types. He corrects the common MDMA misconception: 'MDMA is methylenedioxymethamphetamine. It's meth. But it's meth with a lot of serotonin thrown in there, too.' He is candid about having personal experience with psilocybin in legal clinical circumstances. He argues that the laws around psychedelics need careful attention to guide qualification standards — the compound is not the full treatment; the guide relationship is half the intervention.

Huberman explains that the brain holds a running memory of the prior day's melatonin duration, making it a slow-integrating clock rather than a light meter. In fall at 8 hours of daylight, the system compares against yesterday's slightly-longer signal and registers 'getting darker.' In spring at the same 8 hours, it compares against yesterday's shorter signal and registers 'getting lighter.' The subjective experience — mood, energy, drive — tracks this delta, not the absolute. This is why northern-latitude people often feel depression beginning in late September even though days are still relatively long. The intervention Huberman uses: a 900-lux drawing tablet placed at the coffee station, used for 5 minutes in the morning. As days shrink, he gradually holds it slightly closer, increasing effective lux without increasing session time.

Huberman notes that researchers at the University of Texas in Houston are beginning to incorporate the soleus push-up into protocols for people with limited mobility who cannot walk. The movement — pushing the toe down while raising the heel — mimics aspects of the gait cycle. It is not a replacement for zone 2 cardio or resistance training, but it meaningfully offsets the metabolic cost of prolonged sitting. The finding that no other limb movement produces this effect is what makes the soleus exceptional: the mechanism appears specific to that muscle's fiber type and the metabolic pathways it preferentially uses.

Huberman frames this in the context of his discussion of neuroplasticity: all paths to plasticity involve deploying neuromodulators. Playing an instrument with others triggers simultaneous dopamine (social reward), acetylcholine (focused learning), and serotonin (sustained effort reward). The cross-modal training — motor cortex, auditory cortex, social circuitry — is what produces the unusually wide resting-network connectivity. He is careful to note this does not mean children should have psychedelics; the argument runs in the reverse direction: the accessibility and safety of music education make it the preferred intervention for exactly the brain effects adults seek from psychedelics.

The Conti series was conceived as a mental-fitness counterpart to the Andy Galpin physical-fitness series. Huberman emphasizes that all worksheets and practices are zero-cost and can be done without a therapist. Conti's three-drive framework for relationships — aggressive drive, pleasure drive, and generative drive — is described as a better predictor of relationship compatibility than personality traits, shared interests, or Myers-Briggs-style indicators. The liminal-state access (waking/sleep boundary) is the most immediately actionable: lying still while alert, allowing symbolic content to surface, then immediately journaling without interpretation.

When you close your eyes, interoception dominates and breathing/heart rate become the metronome — time is fine-sliced. When you open your eyes on near objects, exteroceptive time is faster still. Gaze toward the horizon slows perceived time. Imagining yourself on a rotating globe extends it further. Huberman notes this is personally most useful for improving task switching — he describes himself as someone who 'goes into the trench and doesn't leave' — and the exercise trains the nervous system to shift registers deliberately. He also references Hitchcock's use of layered time domains within a single 75-minute film as artistic evidence of this perceptual system.