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

1. Gravity Fortitude

   • Muscles, bones, pumps, and tubes

   • Cardiovascular and postural strength

   • Back pain, leg swelling, stair climbing, grip strength

2. Gravity Sensing

   • Inner ear, proprioception, vestibular function

   • Balance tests (like one-leg standing)

   • Cold sensitivity, interoception, dizziness/vertigo

3. 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