The Gravity Doctors

Lachlan Kent
  • 5.0 (4)
  • MEDICINE
  • UPDATED SEMIWEEKLY

Dr Brennan Spiegel and Dr Lachlan Kent introduce you to the world of Biogravitational Medicine, how gravity shapes our bodies and minds for better or worse. Explore the principles of gravity management, how you can improve your gravity resilience, and what to do when gravity fails you and your body. Dr Spiegel is a trained M.D., professor of public health at Cedars-Sinai hospital in LA, and author of the book 'Pull - How gravity shapes your body, steadies the mind, and guides our health'. Dr Kent is a cognitive scientist with a PhD in the psychology of 'mental gravity'.

Episodes

  1. 4D AGO

    All loved "UP" on Valentines Day: Gravity and cuffing season

    Dr Brennan Spiegel (physician, gastroenterologist, and author of Pull) and Dr Lachlan Kent (cognitive scientist and founder of Mental Gravity) explore how seasons, sunlight, serotonin, and gravity shape mood, attraction, and human connection. Broadcasting from opposite hemispheres—Brennan in winter in Los Angeles and Lachlan in summer in Melbourne—they examine why people often feel more “down” in winter, why this is linked to reduced sunlight and serotonin, and how this helps explain the phenomenon known as “cuffing season”—the seasonal urge to pair up. They connect dating, love, posture, breath, yoga, serotonin, oxytocin, and even planetary orbits into a single biogravitational story: human connection is shaped by the same gravitational cycles that shape the seasons themselves. Seasons as Gravitational Cycles Seasons arise from Earth’s orbit around the sunNot just temperature cycles, but gravitational and light cycles Mood follows seasonal gravity: Summer = outward, expansive, light Winter = inward, heavy, contractingBreath mirrors this cycle: in/up, out/down Winter, Serotonin, and Mental Gravity Sunlight boosts serotoninLow winter sunlight → lower serotonin → heavier moodSeasonal Affective Disorder (SAD) as a gravity-related mood stateSerotonin as a “gravity management molecule” that supports: Muscle toneCirculationUpright postureMental elevationLove, Attraction, and Gravity “Falling in love” uses gravitational language Uprightness—physical, emotional, moral—is attractiveWinter dating favors depth over displaySpring favors peacocking; winter favors bondingLong-term connection as gravitational alignment of values Winter Practices for Gravity Resilience Movement & PostureYoga as a winter-friendly anti-gravity practiceInversions, posture, alignment, balanceLow-intensity movement over intense training Light &EnvironmentMaximize sunlight exposureUse light boxes in high-latitude wintersGet outside when possible Diet & ChemistryTryptophan-rich foods: turkey, avocado, chicken, chickpeas, kidney, beans, eggs, tofu, nutsSupport serotonin production through diet ConnectionCuddling, closeness, bondingOxytocin releaseOxytocin → vagus nerve → serotoninParasympathetic “rest and digest” state Neurochemistry of Winter Bonding Oxytocin primes vagus nerveVagus nerve regulates serotonin releaseCuddling + calm = anti-gravity physiologyParasympathetic tone matches seasonal slowing Biogravitational Medicine in Daily Life Human health reflects planetary physicsSun, moon, Earth, and orbit shape biologyMood, love, and seasons are not mystical—just naturalGravity as the hidden organizer of emotion, posture, and connection Timecodes 00:00 — Welcome & hemispheres01:15 — Seasons and gravity02:15 — What is cuffing season?03:15 — Mood, winter, and seasonal affect04:40 — Sunlight, serotonin, and heaviness06:05 — Planetary cycles and breath cycles07:15 — Love as anti-gravity08:15 — Depth vs display in dating09:20 — Uprightness and attraction10:45 — Winter activities and posture11:35 — Yoga and winter gravity13:15 — Balance, breath, and alignment15:40 — Light therapy and sunlight16:40 — Diet and serotonin foods16:55 — Cuddling, oxytocin, vagus nerve18:15 — Parasympathetic winter mode19:05 — Biogravitation and planetary life20:35 — Falling in love & falling physically21:00 — Closing reflections Resources The Gravity Doctors: https://thegravitydoctors.comDr Brennan Spiegel: https://brennanspiegelmd.comDr Lachlan Kent: https://lachlankent.auBook — Pull: How Gravity Shapes Your Body, Steadies the Mind, and Guides Our Health

    22 min

  2. FEB 6

    How the Brain Senses Gravity — with Elisa Ferrè

    Dr Lachlan Kent and Dr Brennan Spiegel are joined by Elisa R. Ferrè, professor of cognitive neuroscience at Birkbeck, University of London, and one of the world’s leading experts on graviception and the vestibular system. Together, they explore how the brain senses gravity without a single “gravity receptor,” why the vestibular system has no primary cortex, and how gravity is computed as a distributed, multisensory model integrating vestibular, visual, proprioceptive, and visceral signals. The conversation spans neuroscience, emotion, aesthetics, culture, spaceflight, and mental health—revealing gravity as the hidden scaffolding of perception, meaning, and wellbeing. 1. What Is Graviception? The brain’s ability to sense and model gravityNot driven by a single receptor or cortical areaConstructed through multisensory integrationFundamental to embodiment, orientation, and survival Why the Vestibular System Is Unique No unimodal “vestibular cortex”Projects broadly across the brainDoes not produce a clear conscious sensationBecomes noticeable mainly when something goes wrong (dizziness, vertigo, nausea) The vestibular system acts as the glue binding mind and body, anchoring us in a single embodied perspective. How the Brain Computes Gravity Gravity is not perceived directlyThe brain integrates: Vestibular otolith signals (head tilt, linearacceleration)Visual cues (verticality, alignment)Proprioception (joints, muscles, posture)Visceral signals (internal organs)Each signal is weighted by reliability to form an internal model of terrestrial gravity. Gravity, Meaning, and Culture Preferences for verticality (upright lines, tall buildings)Vertical = power, stability, positivityDownward tilt = unease, disorderGravity shapes art, architecture, language, and metaphor Up = good, free, elevatedDown = heavy, negative, constrained Emotion, Fear, and the Vestibular System Vestibular pathways connect directly to: AmygdalaInsulaHypothalamusThis explains why vestibular disturbances are emotionally chargedDizziness and vertigo trigger fear, nausea, and autonomic responsesGravity sensing is deeply tied to survival systems Weightlessness and Freedom Parabolic flight (“vomit comet”) as a unique graviceptive stateWeightlessness described as profound freedomAlso physiologically challengingPost-flight “down” feelings mirror return to gravity Freedom comes with a cost: sensory conflict and adaptation demands. Space Adaptation & Neuroplasticity Astronauts experience space motion sicknessSymptoms: nausea, disorientation, brain fogThe brain can adapt through neuroplasticityAdaptation takes time, energy, and training Implicationsfor long-term space travel and Mars exploration. Gravity, Mental Health, and Everyday Life Anxiety as mis-tuned gravity anticipationDepression as altered temporal and bodily groundingMental fitness as trainable gravity resilience Tools discussed: Yoga and postureBreath awarenessGrounding through the feetWeighted blanketsMusic, rest, and multisensory regulationPractical Graviceptive Tip Stand still and feel the pressure through the soles of your feetNotice the security of 1GUse grounding as a way to reduce anxiety and reset expectations Timecodes 00:00 — Introduction & guest welcome02:00 — What makes the vestibular system unique05:00 — Why gravity is mostly unconscious06:30 — How the brain computes gravity09:30 — Homunculus vs gravity computation11:30 — Gravity as a prior for perception14:00 — Semantics, aesthetics & verticality17:00 — Architecture, art & meaning20:00 — Vestibular system & emotion22:00 — Parabolic flight & weightlessness24:00 — Freedom, addiction & the cost of zero-G28:30 — Space adaptation syndrome31:00 — Can humans adapt to Mars?35:30 — Everyday graviception & grounding38:00 — Closing reflections Resources The Gravity Doctors: https://thegravitydoctors.comDr Brennan Spiegel: https://brennanspiegelmd.comDr Lachlan Kent: https://lachlankent.au

    39 min

  3. JAN 27

    EMERGENCY EPISODE: Alex honnold’s incredible gravity-defying climb

    Dr Brennan Spiegel (physician, gastroenterologist, and author of Pull) and Dr Lachlan Kent (cognitive scientist and founder of Mental Gravity) drop an emergency episode to unpack one of the most extreme acts of gravity defiance ever witnessed: Alex Honnold climbing a 100-plus-storey skyscraper without ropes. Using Honnold as an “extreme phenotype,” they explore what his remarkable calm reveals about fear, anxiety, graviception, and mental gravity. Drawing on neuroscience, psychology, and lived experience, they examine how Honnold’s quiet amygdala, finely tuned salience network, and relentless present-momentfocus allow him to operate where most humans would be paralysed by fear. The episode bridges elite performance and everyday mental health, asking: what can the rest of us learn—safely—from someone who literally does not fear falling? 1. Why Alex Honnold Matters A real-world example of ultimate gravity resilienceFree-solo climbing as the most literal test of mental gravityAnxiety, fear of falling, and bodily panic stripped awayA window into the far edge of human psychological capacity Fear, Falling, and the Brain AmygdalaHonnold’s amygdala shows minimal activation to fear-inducing stimuliContrast with anxiety, chronic pain, IBS, and fibromyalgia, where the amygdala is hyper-vigilant Salience Network & Anterior InsulaDetects what matters in the body and environmentSimulates graviceptive cues without triggering panicAnchors awareness in the present moment Being in the Moment—Taken Seriously Honnold’s survival depends on microsecond-level presenceNo anticipatory anxiety, no future projectionFinger placement, balance, and movement solved in real timePresence as an adaptive skill—not a slogan Gravity Sensitivity as a Continuum Humans vary widely in tolerance for heights, G-forces, and riskToo much fear → paralysisToo little fear → dangerHealthy functioning lies in the middle of the curve Mental Gravity, Anxiety, and Depression Anxiety = anticipation of fallingDepression = being stuck or weighed down in the presentHonnold represents the opposite extreme: calm within gravityInsights help reframe everyday anxiety as mis-tuned gravity perception Training vs Talent Honnold combines rare inborn traits with years of intense trainingPhysical: extreme strength, precision, enduranceMental: emotional regulation, present-moment focusFear is not absent—it is managed and contained What Can We Learn (Safely)? Not to climb skyscrapers—but to train mental fitness: Cognitive Behavioural Therapy as mentaltrainingMeditation as present-moment conditioningBreathwork, yoga, and grounding practicesSocial connection and rest as recoveryBalancing effort and recovery (noovertraining)Mental fitness = something you work on, not something you either have or don’t have. One Percent Rule You don’t need to be Alex HonnoldChanneling 1% of his presence, calm, and training can meaningfully improve everyday resilience Timecodes 00:00 — Emergency episode & skyscraper climb01:10 — Free Solo and gravity defiance02:15 — Watching the footage & bodily reactions02:45 — Fear, falling & butterflies03:30 — Amygdala findings04:20 — Anxiety, pain & hyper-vigilance05:10 — Salience network & graviception06:20 — Courage vs fearlessness06:50 — Gravity sensitivity across populations07:50 — Mental gravity & anxiety08:50 — Training, not recklessness10:00 — Being truly in the moment11:10 — Depression, anxiety & time orientation12:05 — Learning from extreme phenotypes13:20 — Mental health in a steeper world14:20 — Training for modern life15:20 — Mental fitness beyond CBT16:10 — Meditation, breath & balance17:35 — One percent of Honnold18:30 — Closing reflections Resources The Gravity Doctors: https://thegravitydoctors.comDr Brennan Spiegel: https://brennanspiegelmd.comDr Lachlan Kent: https://lachlankent.auBook — Pull: How Gravity Shapes Your Body, Steadies the Mind, and Guides Our Health

    19 min

  4. JAN 15

    Defying Gravity: The Olympics and the Limits of Human Performance - Ep 9

    How do elite athletes use body, mind, joy, and meaning to push beyond physical limits? Dr Brennan Spiegel (physician, gastroenterologist, and author of Pull) and Dr Lachlan Kent (cognitive scientist and founder of Mental Gravity) explore theOlympics as humanity’s greatest laboratory for defying gravity. With the Winter Olympics approaching, they examine elite athletes as “physics-fighting engines”—bodies and minds trained to resist, redirect, and sometimes seemingly escape gravity. Through stories of Cathy Freeman, Quincy Hall, Alex Honnold, and modern superstars like Steph Curry and Luka Dončić, they show how peak performance is not just physical—it is mental gravity management. They introduce Olympic training as a real-world expression of biogravitational medicine, where strength, balance, imagery, joy, poise, team culture, and meaning all shape how far humans can push their relationship with gravity. 1. Why the Olympics Matter to Mental Gravity The Olympics showcase humanity at the edge of physical limits Elite sport = everyday gravity management taken to extremes Athletes model what it means to fight gravity physically and mentally Peak performance = synchronization of body, brain, and meaning Athletes as Anti-Gravity Prototypes Cathy Freeman (Sydney 2000) “Floating” to gold in the 400m Home crowd as acceleration, not pressure Up, light, fast = opposite of depression Quincy Hall (Paris 400m Final) Turning failure into flight Last-minute mental reversal → physical transcendence Basketball, Ski Jumping, SkatingLeaping, flying, spinning, managing G-forcesAngular momentum and rotational control as gravity mastery Mental Gravity in Elite Performance Performance depends on mental poise, not just muscle Stillness before action Pressure as fuel, not burden Crowds as acceleration, not oppression Joy as a performance amplifier Examples: Steph Curry — joy + precision Luka Dončić — playfulness under pressure Ash Barty — recovery from “the yips” through joy Imagery, Rehearsal, and Gravity Mental imagery as bodily rehearsal Kyrie Irving visualizing free throws Alex Honnold mentally climbing El Capitan before climbing it Mental gravity = using body as template for thought and emotion Up = energized Down = heavy Calm = balanced Fear, Falling, and Mastery Fear of falling = gravitational anxiety Elite athletes train to feel secure within gravity Butterflies in the belly = falling sensations Great athletes use fear to prime—not paralyze—the nervous system Timecodes 00:00 — Welcome & why the Olympics matter 01:00 — Peak athleticism as defying gravity 02:00 — Cathy Freeman & floating to gold 03:30 — Winter sports & G-forces 04:30 — Quincy Hall’s last-minute flight 06:00 — Mental vs physical performance 07:30 — Stillness, pressure & acceleration 09:00 — Joy as a performance tool 10:30 — The yips, anxiety & recovery 12:00 — Mental imagery in sport 13:30 — Kyrie Irving & visualization 14:45 — Alex Honnold & fear mastery 16:15 — Fear, falling & butterflies 17:45 — Biogravitational training stacks 19:00 — Team culture & social gravity 20:30 — VR, the Proteus Effect & training 22:00 — Dead hangs & gravity endurance 24:00 — Olympics as humanity’s gravity experiment 25:00 — Closing reflections Resources The Gravity Doctors: https://thegravitydoctors.com Dr Brennan Spiegel: https://brennanspiegelmd.com Dr Lachlan Kent: https://lachlankent.au Book — Pull: How Gravity Shapes Your Body, Steadies the Mind, and Guides Our Health

    21 min

  5. 12/20/2025

    Serotonin: The Body’s Anti-Gravity Molecule - Ep 8

    Dr Brennan Spiegel (physician, gastroenterologist, and author of Pull) and Dr Lachlan Kent (cognitive scientist and founder of Mental Gravity) explore serotonin as a gravity-management molecule, reframing it not simply as a “happiness chemical,” but as a fundamental biological system that allows life to stand up, move fluids, regulate balance, and remain psychologically buoyant in a gravitational field. Together, Brennan and Lachlan unpack new research on serotonin’s role across the gut, cardiovascular system, lymphatics, vestibular system, reproduction, and mood—showing how 95% of serotonin is produced in the gut, in symbiosis with the microbiome. They trace serotonin’s evolutionary origins from ocean life to land, altitude, and even space, and discuss practical implications for diet, exercise, sunlight, microbiome care, and mental health. 1. What Is Serotonin? A whole-body gravity resilience molecule, not just a brainneurotransmitter Exists in two largely separate compartments: brain and gutCentral to movement, circulation, balance, mood, and vitalityEvolutionarily conserved across plants, animals, and humans Serotonin as a Gravity-Management System Gut & DigestionMotility against gravity in any body orientation Pumps & TubesBlood pressure regulation, cardiac contractility, lymphatic return Balance& OrientationVestibular function; dizziness during SSRI withdrawal ReproductionRetrograde uterine contractions that move sperm upward against gravity Mood &EnergyMental elevation, vitality, resilience, and time perception The Microbiome–Serotonin Alliance Trillionsof microbes are required to trigger serotonin productionThe gut as a “dark, sulfurous, hydrothermal” evolutionary nicheA symbiotic bargain: microbes get mobility; humans get serotoninChanges in altitude, microgravity, and spaceflight rapidly alter serotoninbiology STACK TEN: The Anti-Gravity Diet (introduced) A practical framework from Pull for supporting serotonin production via tryptophan-rich foods. Core principles:Tryptophan as substrateMicrobiome diversityDietary balance rather than supplementation alone Therapeutic & Self-Care Implications Dietary modification (tryptophan-rich foods, microbiome-supportive diets)Exercise and movementSunlight and time outdoorsWorking with dietitians for GI and mood conditions (e.g., low-FODMAP when indicated)Understanding limits and side effects of SSRIsNaturally supporting serotonin across body and mind Metaphor & Meaning The gutmicrobiome as the “spice factory” of human biologySerotonin as the true “spice of life”—powerful, regulating, and double-edgedGravity as the organizing principle linking biology, psychology, and medicine Timecodes 00:00 —Welcome & why serotonin matters01:10 — Serotonin beyond the “happiness chemical”02:20 — Gut vs brain serotonin compartments03:20 — Pumps, tubes & whole-body effects04:25 — Lymphatics, reproduction & balance06:20 — Evolutionary origins & gravitation08:10 — Microbiome symbiosis metaphor10:15 — Altitude, spaceflight & serotonin disruption11:30 — STACK TEN diet introduced12:45 — Diet, microbiome & mood disorders13:50 — Dune, spice & serotonin metaphor15:45 — SSRIs: benefits, limits & side effects17:00 — Natural serotonin support & integration17:45 — Closing reflections & next steps Resources The Gravity Doctors website: https://thegravitydoctors.comDr Brennan Spiegel: https://brennanspiegelmd.comDr Lachlan Kent: https://lachlankent.auBook — Pull: How Gravity Shapes Your Body, Steadies the Mind, and Guides Our Health

    18 min

  6. 12/08/2025

    Brennan's antigravity diet - Boost your serotonin with STACK TEN Ep 7

    Dr Brennan Spiegel (physician, gastroenterologist, and author of Pull) and Dr Lachlan Kent (cognitive scientist and founder of Mental Gravity) explore how diet, microbiome diversity, and serotonin production shape your capacity to stand up to gravity—physically and mentally. They introduce the Anti-Gravity Diet and Brennan’s STACK TEN framework, a simple, evidence-informed way to support the gut’s serotonin “factories” and improve whole-body gravity resilience. Along the way, they unpack how food, fibre, omega-3s, polyphenols, vagus-nerve activation, and mindful rest all participate in the body–mind system that keeps us upright and energised. Together, Brennan and Lachlan discuss babies as “gravity novices,” leaky gut, the gut–brain axis, evolutionary embodiment, time dilation in depression, and why serotonin—serum tone—is essential for managing the constant downward pull of Earth’s gravity. A holistic framework for supporting natural serotonin production—the body’s anti-gravity molecule.Grounded in gastrointestinal physiology, microbiome science, and biogravitational medicine. Not a restrictive diet — a practical, everyday toolkit for gravity resilience.A memory device for foods that supply the raw material (tryptophan) for serotonin production: SalmonTurkeyAvocadoChickpeasKidney beansTofu/TempehEggsNuts Paired with: Fibre → feeds microbes that create short-chain fatty acids Omega-3s → shift the microbiome toward serotonin-supporting species Polyphenols → found in berries, cocoa, turmeric, and green tea 00:00 — Welcome & overview of the Anti-Gravity Diet01:20 — Serotonin as the body’s anti-gravity molecule04:20 — Microbiome diversity & the gut barrier06:30 — Babies, serotonin & early gravity resilience09:40 — Tryptophan, fibre & short-chain fatty acids11:00 — Leaky gut, inflammation & decoherence13:00 — Food–mood science & depression16:40 — What to eat: introducing STACK TEN17:00 — The ten tryptophan-rich foods18:50 — Polyphenols, omega-3s & microbiome tuning19:50 — Beyond diet: exercise, nature, sunlight21:20 — Balancing sympathetic vs parasympathetic tone23:00 — Vagus-nerve stimulation & rest-and-digest24:30 — Gravity as the integrator across biological levels26:00 — Life as a system for managing gravity27:20 — Closing reflections & future topics The Gravity Doctors website: ⁠https://thegravitydoctors.com⁠Gravitype Quiz: virtualmedicine.org/pullDr Brennan Spiegel: brennanspiegelmd.comDr Lachlan Kent: lachlankent.auBook — Pull: How Gravity Shapes Your Body, Steadies the Mind, and Guides Our Health

    28 min

  7. 12/01/2025

    What's your Gravitype? Take the quiz to find out Ep 6

    In this episode, Dr Brennan Spiegel (physician, gastroenterologist, and author of Pull) and Dr Lachlan Kent (cognitive scientist and founder of Mental Gravity) dive deep into gravity resilience and introduce listeners to the new Gravitype Quiz—a wellness tool that blends biomechanics, neuroscience, and psychology to help people understand their personal relationship with gravity. Together, Brennan and Lachlan take the quiz live on the show and compare results, unpacking the three pillars of biogravitational health: gravity fortitude, gravity sensing, and mental gravity. Along the way, they explore back pain, dizziness, cold exposure, resilience, interoception, emotional balance, and how experiences like roller coasters or elevators reveal something about your gravitational tendencies. You can try the full interactive quiz here: brennanspiegelmd.com virtualmedicine.org/pull thegravitydoctors.com 1. What Is a Gravitype? A personalised profile of gravity resilience Based on the framework in Pull and grounded in emerging concepts in biogravitational medicine Not a diagnostic tool — currently evidence-informed and intended for education/wellness Gravity Fortitude Muscles, bones, pumps, and tubes Cardiovascular and postural strength Back pain, leg swelling, stair climbing, grip strength Gravity Sensing Inner ear, proprioception, vestibular function Balance tests (like one-leg standing) Cold sensitivity, interoception, dizziness/vertigo Mental Gravity Weighted-down vs uplifted Stress tolerance, emotional recovery, “flow” states Dual-continuum model of mental health Grip strength as a predictor of longevity BMI and physical load on the spine Orthostatic light-headedness and blood pressure regulation Inner-ear disorders (e.g., BPPV) and sensory hypersensitivity The anterior insula as the “gravity conductor” of the body–mind symphony They answer questions on: Opening a jar Climbing stairs Back pain Light-headedness Balance Cold tolerance Emotional reactivity and resilience Roller coaster sensitivity Positive emotional absorption (flow) Each reflects personally on past injuries, thyroid health, yoga, meditation, diet, travel, and evolving gravitational resilience across their lives. Durable fortitude Normosensitive sensing Lifted mental gravity Notes how training (cold exposure, yoga, flying) reshaped Lachlan's sensitivity over time. Reflections on vertigo, cold intolerance, and emotional uplift as part of Brennan's profile. Both discuss how gravitypes can change with training, awareness, and targeted practices. Examples include: Down-regulating sensory overload (slow nasal breathing, longer exhales, box breathing) Strengthening the gravity fortitude system (movement, posture, reducing sitting time) Noticing “watch-outs” such as back pain, dizziness, or emotional rumination Links included in the show notes. 00:00 — Welcome, origins of the gravitype 01:30 — Gravity resilience basics 03:00 — Gravity fortitude (muscles, tubes, pumps) 06:45 — Mental gravity explained 08:00 — Starting the quiz 09:00 — Grip strength & longevity 11:00 — Stair climbing & cardiovascular load 12:00 — Back pain & evolution 15:00 — Orthostatic dizziness & fainting 18:00 — BMI, weight, and gravitational load 20:00 — Leg swelling, pumps & tubes 23:30 — Gravity sensing & vertigo 25:00 — Balance tests (one-leg stance) 26:30 — Cold sensitivity & nervous-system tuning 29:30 — Interoception & the anterior insula 33:00 — Stress, heaviness & mental gravity 36:00 — Roller coasters, turbulence & fear responses 38:00 — Emotional resilience and bouncing back 41:00 — Flow states and uplift 43:00 — Revealing their gravitypes 46:30 — What their results mean 48:00 — Final reflections & where to take the quiz The Gravity Doctors website: https://thegravitydoctors.com Gravitype Quiz: available on BrennanSpeigelMD.com & virtualmedicine.org Dr Brennan Spiegel: brennanspiegelmd.com Dr Lachlan Kent: lachlankent.au Book — Pull: How Gravity Shapes Your Body, Steadies the Mind, and Guides Our Health

    50 min

  8. 11/03/2025

    Mental Gravity: The hidden force shaping your mind and emotions - Ep 5

    Dr. Brennan Spiegel (Cedars-Sinai) and Dr. Lachlan Kent explore how gravity shapes not only our bodies but our minds. Through the lens of Cathy Freeman’s gold-medal run, they discuss mental gravity — the feeling of emotional “weight” and lightness that defines human experience. From Einstein’s relativity to embodied cognition and Cedars-Sinai’s virtual-reality therapy, they connect physics, psychology, and physiology to show how alignment with gravity may be the key to wellbeing. Topics include depression as a “mental gravity well,” glucose and perception, VR and levity, and how mindfulness, diet, and physical balance can help us stay buoyant in heavy times. Key themes: Mental Gravity: The experience of emotional and cognitive “weight,” shaped by our alignment with the physical world’s gravitational pull. Embodied Cognition: How bodily states and forces (like gravity, glucose, or posture) shape perception and thought.Gravity Intolerance: A unifying framework for disorders where physical and mental balance are disrupted. Mind over Matter: Using imagery, mindfulness, and movement to generate upward momentum and emotional lightness.Timecodes: 00:00 – 01:30 | Welcome to The Gravity DoctorsIntroducing Brennan and Lachlan; overview of physical and mental gravity. 01:30 – 03:50 | The Cathy Freeman StoryHow Cathy transcended the “weight of expectation” to run with joy and lightness — an example of mental gravity at its best. 03:50 – 06:00 | The Weight of EmotionExploring why positive emotions feel light and negative emotions feel heavy — from embodied metaphors to physical postures of depression. 06:00 – 08:10 | Embodied Cognition and Glucose StudiesBrennan cites research showing blood-glucose levels alter perception of hill steepness — a literal bridge between physiology and perception. 08:10 – 11:00 | The Birth of the Theory of Mental GravityLachlan recalls his “aha” moment linking Einstein’s general relativity lecture on black holes to psychological depression — both described using the same language of heaviness, collapse, and isolation. 11:00 – 12:40 | Gravity Wells, Black Holes, and RecoveryComparing mental “gravity wells” to depression — but unlike black holes, people can pull themselves out. 12:40 – 16:20 | Champagne, Joy, and the Physics of EmotionWhy celebration rituals mirror gravitational metaphors — bubbles rising, buoyancy, and the inevitable “come-down.” 16:20 – 19:30 | Virtual Reality as a Gravity-Hacking ToolCedars-Sinai research: VR experiences that simulate floating or flying reduce pain, anxiety, and inflammation — measurable physiological effects of simulated levity. 19:30 – 22:00 | Mindfulness and Mental ImageryUsing mental imagery and meditation to reshape the brain-body landscape and foster feelings of lightness and alignment. 22:00 – 25:50 | The Continuum of Mind and BodyWhy mind and body aren’t separate but part of one continuous system — like a cross-country landscape shifting seamlessly from desert to sea. 25:50 – 28:30 | Gravity Intolerance and Health ResilienceReframing conditions like IBS, POTS, and anxiety as variations of gravity intolerance; maintaining physical and mental balance as the essence of wellbeing. 28:30 – 30:00 | Everyday Applications & Closing ReflectionsFrom mindfulness to serotonin-rich diets and time in nature — practical tools to stay buoyant. Final reflections on finding balance between empowerment and medical treatment. Want to discover your 'Gravitype'? Visit The Gravity Doctors website:https://thegravitydoctors.com/ Order Brennan's book "Pull" to learn more about how gravity shapes your health in both body and mind via his personal ⁠⁠personal website⁠⁠: https://www.brennanspiegelmd.com/pull Visit ⁠⁠Lachlan's website ⁠⁠to learn more about his work in mental gravity: https://lachlankent.au/ Music by ⁠ALLIRA⁠ and Visceral Sound - https://www.youtube.com/@ALLIRAmusic Recording at ⁠JTB Studio⁠ by David Iskandaryan.

    31 min

  9. 10/13/2025

    Harnessing gravity to overcome chronic illness w/ Harmon Clarke - Ep 4

    In this uplifting and deeply human episode of The Gravity Doctors, Dr. Brennan Spiegel (Cedars-Sinai gastroenterologist and author of PULL) and Dr. Lachlan Kent (cognitive scientist and theorist of Mental Gravity) sit down with Harmon Clarke, a patient-turned-researcher whose remarkable recovery story illuminates the future of biogravitational medicine. From septic shock and 200 days in hospital to yoga teacher, breathwork practitioner, and health researcher, Harmon’s journey embodies resilience, creativity, and the healing power of re-engaging with gravity. Together, they explore how movement, inversions, virtual reality, and breathwork can transform pain and depression into buoyancy and balance — culminating in a spontaneous “Gravity Rap” that captures the spirit of the show. Core Themes Gravity as a unifying metaphor for physical and mental health Movement and inversion therapy for resilience and recovery Virtual reality and embodied cognition Tensegrity, balance, and the biomechanics of wellbeing Patient empowerment and the hero’s journey in healing Biogravitational medicine as a synthesis of East–West paradigms 00:00 – Welcome and Introductions 01:00 – Facing the Grave 03:00 – Virtual Reality and the Mind–Body Connection 06:00 – Yoga, Breathwork, and Natural Recovery 08:00 – The Science of Inversion and Tensegrity 14:00 – Hospitals and Gravity Intolerance 18:00 – Depression as a Gravitational Condition 24:00 – Cathy Freeman and Gravitational Flow 25:45 – East Meets West 30:00 – Rebalancing Medicine 33:00 – The Simple Tools of Healing 35:00 – Designing the Future of Biogravitational Medicine 38:00 – Generational Health and Modern Comfort 41:00 – The Gravity Rap Finale Order Brennan's book "Pull" to learn more about how gravity shapes your health in both body and mind via his personal ⁠⁠personal website⁠⁠. Visit ⁠⁠Lachlan's website ⁠⁠to learn more about his work in mental gravity. Music by ⁠ALLIRA⁠ and Visceral Sound Recording at JTB Studio by David Iskandaryan. Editing by Dr Karisma Suchak.

    46 min

  10. 09/30/2025

    Top 10 Gravity Tips - Ep 3

    Biogravitational Medicine is a holistic approach to maintaining health in both body and mind. It's like a toolkit where you can find what works for you and your particular situation. Here are our top ten that work for most people most of the time. (As always, consult a doctor for personalised medical advice before attempting anything that might pose a risk to your physical or mental health, or for treatment of acute or chronic conditions. The information here is for educational and information purposes only.) Order Brennan's book "Pull" to learn more about how gravity shapes your health in both body and mind via his personal ⁠personal website⁠. Visit ⁠Lachlan's website ⁠to learn more about his work in mental gravity. Music by ALLIRA and Visceral Sound This episode was recorded at ⁠Myst Music⁠. Audio engineering by Jeremy Roberts. Audio and video editing by Dr Karisma Suchak.

    35 min

  11. 09/11/2025

    'Pull' book preview - Ep 2

    Dr Spiegel has written a book about gravitational health called 'Pull' on the wide ranging themes underpinning this podcast - gut health, mental gravity, serotonin, the inner ear, the body's pumps and tubes, the gravitostat, and many more. The hosts take a tour through the world of biogravitational medicine by telling the story of what inspired the book, where the science is heading, and how people can apply the principles in their daily lives. Order Brennan's book "Pull" to learn more about how gravity shapes your health in both body and mind via his personal personal website. Visit Lachlan's website to learn more about his work in mental gravity. Music by ALLIRA and Visceral Sound. This episode was recorded at Myst Music. Thanks to Jeremy Roberts for audio engineering and Dr Karisma Suchak for editing.

    25 min

  12. 09/09/2025

    Gut Feelings: The gravitational roots of the mind-body connection - Ep 1

    You know the feeling you get in your belly when falling on a rollercoaster? Ever wondered why we get similar gut feelings when we're "falling" in love?  In this episode, Brennan (a gastroenterologist) and Lachlan (a cognitive scientist) talk about how gravity shapes gastrointestinal function and what relation gut feelings have to physical and mental health. They discuss Brennan's viral scientific paper, "Gravity and the Gut: A Hypothesis of Irritable Bowel Syndrome" and Lachlan's breakthrough theory of the mind called "Mental Gravity", and the connections between their shared ideas. Conditions like IBS often lead to anxiety and depression, which are the mental equivalent of "falling" and having "fallen", and so they draw a connection between gut health, gut feelings, and mental health. Strap yourself in for a rollercoaster ride through the topsy-turvy world of gut feelings in both body and mind. Order Brennan's book "Pull" to learn more about how gravity shapes your health in both body and mind via his personal personal website. Visit Lachlan's website to learn more about his work in mental gravity. Music by ALLIRA and Visceral Sound. This episode was recorded at ⁠Myst Music⁠. Thanks to Jeremy Roberts for audio engineering.

    28 min
  • 12 Episodes

Ratings & Reviews

5
out of 5
4 Ratings

About

Dr Brennan Spiegel and Dr Lachlan Kent introduce you to the world of Biogravitational Medicine, how gravity shapes our bodies and minds for better or worse. Explore the principles of gravity management, how you can improve your gravity resilience, and what to do when gravity fails you and your body. Dr Spiegel is a trained M.D., professor of public health at Cedars-Sinai hospital in LA, and author of the book 'Pull - How gravity shapes your body, steadies the mind, and guides our health'. Dr Kent is a cognitive scientist with a PhD in the psychology of 'mental gravity'.

Information

  • Creator
    Lachlan Kent
  • Years Active
    2025 - 2026
  • Episodes
    12
  • Rating
    Clean
  • Copyright
    © Lachlan Kent
  • Show Website
    The Gravity Doctors