Your brain has its own immune system, and whether those immune cells protect your brain or attack it depends largely on your metabolic health, which you control with what you eat, how you move, how you sleep, and even the air you breathe.

Dr. David Perlmutter is a board-certified neurologist and six-time New York Times bestselling author of Grain Brain, Brain Maker, Drop Acid, and now Brain Defenders.

He explains how microglia, the brain's immune cells, shift from brain defenders to brain destroyers when your metabolism breaks down, and why that shift sits underneath Alzheimer's, Parkinson's, multiple sclerosis, and even depression. The conversation covers the diet pillars that keep blood sugar in check, why you need both cardio and strength training, how poor air quality and poor sleep feed inflammation, and the tests that show where you stand long before your memory slips.

He closes with his three strategies for wellness: have fun, stay socially connected, and take charge of your own health destiny.

Time Stamps:

05:47 How Brain Defenders ties together Grain Brain, Brain Maker, and Drop Acid

08:14 Immunometabolism: why metabolism affects every organ

10:08 The gut microbiome and the brain

11:12 How AI is connecting the dots across specialties

14:54 Microglia: the brain's own immune system

19:12 How metabolism flips microglia from defenders to destroyers

21:37 Type 2 diabetes, blood sugar, and choosing your diet

22:48 Fiber, polyphenols, protein, and dietary fat

25:56 The Mediterranean diet and the Ornish and Tanzi study

27:40 Cardio vs. strength training, myokines, and BDNF

30:50 Flexibility and balance training to avoid injury

32:21 Air quality, PM2.5, and air purifiers

34:23 Why sleep matters for your brain

40:34 Sleep latency and melatonin timing

42:11 Tests to track your metabolic and brain health

44:53 Vitamin D and K2

46:38 3 strategies to get and stay well

Links:

Dr. David Perlmutter: drperlmutter.com

Brain Defenders (book and ordering bonuses): braindefenders.com

40+ Fitness coaching (2 slots open, 16 weeks plus 2 freeze weeks): email coach@40plusfitness.com

The way to recover stronger from surgery is to build the foundation before you ever get to the operating room: go in with as much muscle as you can keep, feed the repair with protein, and get your sleep, stress, and inflammation under control, then layer on advanced tools only with a doctor's guidance.

Zora Benhamou is a gerontologist, healthy aging coach, and host of the Hack My Age podcast. After years of fighting osteoarthritis with injections, diet, and rehab, she had both hips replaced 12 weeks apart. She walks through how she kept her muscle with blood flow restriction bands, what she ate to rebuild bone around the implant, which peptides and other biohacks she tried, and why none of them matter without the basics.

She closes with her three strategies for aging well: nurture your network, learn to breathe through your nose, and understand your hormones.

Time Stamps:

05:05 From looking good to longevity: becoming a gerontologist

08:40 Osteoarthritis vs. osteoporosis and trying to avoid surgery

10:06 PRP, hyaluronic acid, and pentosan polysulfate

15:34 Two hip replacements, 12 weeks apart

18:00 Keeping muscle with KAATSU blood flow restriction bands

20:29 Protein, collagen, and bone-building nutrition for recovery

22:01 The anti-inflammatory diet

23:09 Sleep, stress, and hormones in recovery

26:25 Advanced recovery tools and the Wolverine stack peptides

31:57 Methylene blue

34:02 The biohacking pyramid: foundation first

36:31 Test one thing at a time

38:52 Wellness strategy 1: nurture your network

41:05 Wellness strategy 2: functional nose breathing

43:24 Wellness strategy 3: understand your hormones and protect your bones

Links:

Zora Benhamou: hackmyage.com (website, podcast, and all her social channels)

Hack My Age podcast: hackmyage.com

40+ Fitness coaching (3 slots open, 16 weeks plus 2 freeze weeks): email coach@40plusfitness.com

Better sleep after 40 comes from building the right daily rhythms, not from trying harder at bedtime. Mollie McGlocklin, creator of Sleep Is a Skill, makes the case that sleep is a learnable skill, and that forcing it or chasing a perfect score on your tracker usually makes it worse.

Mollie went through acute insomnia while traveling overseas and left doctor after doctor with sleeping pills and no real guidance. In this episode she explains what sleep latency and sleep efficiency tell you, why falling asleep the second your head hits the pillow can be a red flag, which tracker numbers you can trust (and why deep sleep and REM aren't among them), when a nap helps and when it hurts, what to do when good sleep habits aren't enough, and why sleep really begins in the morning.

Time Stamps:

03:42 Why you can't force sleep

05:07 Mollie's insomnia story

06:17 Sleeping pills and the case for CBT-I

09:07 Sleep as a skill, not a sleeper type

11:36 Sleep latency: when falling asleep fast is a red flag

13:18 Sleep efficiency and nighttime wakeups

14:51 Binaural beats, white noise, and sleep sounds

17:28 Sleep stages and why tracker data misleads

18:37 Blood oxygen averages and missed sleep apnea

20:12 Track trends in one device: HRV and heart rate

23:35 How wearables spotted COVID early

25:14 Why sleep apnea testing should be repeated

27:18 Naps and the insomnia exception

28:49 The caffeine nap

31:50 Shift workers and longer naps

33:37 When sleep hygiene isn't enough

35:15 CBT-I, ACT, and circadian entrainment

38:52 The health of your word

39:09 Sleep begins in the morning

40:48 Loneliness, relationships, and sleep

41:29 What hunter-gatherers teach us about sleep

Links:

Sleep Is a Skill (newsletter, podcast, and coaching): https://sleepisaskill.com

The Wellness Roadmap: https://amzn.to/3U1xEdn

Pain is built by the brain, and because the brain can change, pain can change. That is the core of what pain psychologist Dr. Rachel Zoffness lays out in this episode. Pain is never all in your head, but it is never only in the body part that hurts either. It is biopsychosocial: biology, psychology, and your social world all turn the volume up or down.

Dr. Zoffness is faculty at the UCSF School of Medicine, lectures on pain science at Stanford, and is the author of Tell Me Where It Hurts: The New Science of Pain and How to Heal. She walks through her three core truths about pain, why 96% of medical schools teach no dedicated pain science, the pain dial (how stress, mood, and attention change what you feel), and the pain recipe: writing down what makes a bad pain day so you can build the opposite. She closes with the three things that matter most for a healthy life with pain: movement, social health, and balance.

Time Stamps:

03:48 Why pain is coming for all of us

07:56 Core truths 1 and 2: pain is the brain's opinion, and the brain can change

10:40 Core truth 3: pain is always biopsychosocial

16:05 A hammer and a bigger hammer: why medicine reaches for pills and surgery

19:41 The sociological domain: loneliness, trauma, and the 80% overlap

23:06 Acute vs. chronic pain, and the opioid lie

26:40 The pain dial: how stress and anxiety turn the volume up

27:46 Mood and attention change pain volume

32:03 Your high pain recipe, your low pain recipe, and painsomnia

36:11 Movement first, pain reduction later

37:35 Loneliness, cortisol, and social health

41:12 You have more power over your pain than you've been told

Links:

Dr. Rachel Zoffness (free resources page): https://www.zoffness.com

Tell Me Where It Hurts: The New Science of Pain and How to Heal

Instagram: @therealdoczoff

Fit for Task Muscle and Strength Workshop: https://40plusfitness.com/muscle

You can still build muscle after 40, and the research says you can build it at close to the same rate as a 25-year-old. What has to change is not how hard you train, it is how strategically you train, eat, and recover.

Alain Gonzalez is a fitness coach, author, and the creator of the largest YouTube channel dedicated to men's fitness over 40. He has spent more than 17 years helping men build muscle and get their health back, and his book is Muscle After 40. In this conversation we walk through his four pillars of muscle growth: mindset, training, nutrition, and recovery. We cover why volume is the thing that has to change with age, why movement quality sits above everything else in the gym, how to order your nutrition so protein comes first, and why recovery is the pillar most people over 40 quietly skip.

Time Stamps:

05:21 Why muscle matters as you age

07:08 The four pillars of muscle growth

08:30 Pillar one, mindset

09:39 Pillar two, training and volume

11:14 Movement quality comes first

15:24 Can you still build muscle in your 50s and 60s

18:06 The staircase model

19:18 Effort and training close to failure

20:37 How progressive overload really works

22:23 The nutrition staircase, protein first

24:10 Protein frequency after 40

24:47 Recomposition versus bulking and cutting

26:14 The recovery staircase

26:59 Sleep and chronic stress

28:49 Three strategies to get and stay well

Links:

Alain Gonzalez on YouTube: Muscle Monsters

Alain's book, Muscle After 40: How to Build the Strongest, Most Jacked Body of Your Life: https://amzn.to/4cVbmAD

Fit for Task Muscle and Strength Workshop, free and live Tuesday September 8th at 8:00 PM Eastern: https://40plusfitness.com/muscle

Allan's book, The Wellness Roadmap: https://amzn.to/3U1xEdn

Living longer is not the goal. Living better is, because the extra years most people are gaining are sick years, not good ones.

In this solo episode, Coach Allan digs into the Global Burden of Disease study published in The Lancet Public Health, which found the gap between lifespan and healthspan grew from 8.8 years in 1990 to 10.7 years by 2023. That is nearly eleven years, about 15% of a life, spent sick and incapable at the end. He opens with a story from Puerto Vallarta, where an earthquake left a man in his early seventies stuck on the third floor because he did not have the leg strength to walk down the stairs, and had to tell his wife to go on without him. The earthquake did not cause that. It revealed it. Allan then walks through his own earthquake moment, a stage 3 kidney cancer diagnosis and the immunotherapy he is still going through, the five levers that actually close the gap, and why the retirement-account model of health is the wrong one.

Time Stamps:

00:00 Lifespan versus healthspan, and the gap between them

05:58 Why the United States has the widest gap

10:02 Strength and stamina as non-negotiables

13:17 Purpose and relationships as the foundational why

17:23 Health deposits are not a retirement account

20:02 The Long Life Readiness Quiz

Links:

Long Life Readiness Quiz (free, takes a couple of minutes): https://40plusfitness.com/gap

The Wellness Roadmap by Allan Misner: https://amzn.to/3U1xEdn

Relying only on low-impact exercise can leave you more fragile as you age, because your bones and connective tissue need impact to stay strong. Graham Tuttle, a coach, the author of Born to Sprint, and the self-styled Barefoot Sprinter, argues that sprinting, jumping, and throwing are the real markers of a healthy body at any age, and that stripping impact out of your training in the name of safety quietly erodes the very capacity it is meant to protect.

In this conversation, Graham and Coach Allan get into why impact signals your bones and your brain that they are still needed, how training barefoot restores feedback and movement most of us have lost, the story of Graham coaching his own father to run again 15 years into a Parkinson's diagnosis, and his 10% rule for reintroducing impact safely when you are starting from badly out of shape.

Time Stamps:

06:00 Trusting the body's natural design

07:44 Poor eyesight, lifting for looks, and losing body connection

12:27 Rethinking the reductionist physical-therapy model

13:42 Fascia, movement patterns, and the whole body

17:57 Why impact keeps the body and brain online

20:51 How the muscle system manages force

24:04 Physical limitation and how you perceive the world

30:23 Impact, hormones, bones, and the brain

32:56 His father's Parkinson's and rethinking fitness

35:55 Finding purpose and meaning in older age

39:44 Jeffy: starting from ground zero

41:12 The philosophy of sprinting

46:44 Using impact to shake things loose

48:25 Rebuilding movement patterns from the ground up

54:03 Sprinter swinging and plyometrics

55:01 Restoring the ability to sprint

Links:

Graham Tuttle's book, Born to Sprint: Unlock Your Natural Strength, Speed, and Athleticism: https://amzn.to/4xzlCqa

Graham's website: https://thebarefootsprinter.com/

Graham on YouTube, Facebook, LinkedIn, TikTok, and Instagram: The Barefoot Sprinter

Coach Allan's book, The Wellness Roadmap: https://amzn.to/3U1xEdn

Mobility, your ability to move a joint through its range using your own strength, matters more for men over 40 than passive flexibility, and rebuilding it is what lets you keep squatting, lifting, and moving through daily life without pain. In this episode I talk with Dean Pohlman, founder of Man Flow Yoga and author of Yoga Fitness for Men, about why sitting all day leaves most of us with mobility deficits that gym work alone won't fix. We get into the real difference between flexibility and mobility, why knee pain usually starts at the hips, core, and ankles, and the simple daily habits that keep you moving well as you age.

Time Stamps:

03:59 Why yoga feels time-intensive

07:42 Why men feel out of place in yoga classes

09:51 Flexibility vs. mobility explained

12:15 The everyday movements that need mobility

13:33 Why mobility work is essential, not a bonus

14:41 Benefits beyond mobility: breathing, balance, pain relief

17:39 What makes Man Flow Yoga different

21:02 Why you shouldn't quit squats at 40

23:38 Knee pain starts at the hips, core, and ankles

25:30 Allan's ankle injuries and the mobility fix

27:16 Building yoga and strength into a weekly routine

29:33 Dean's 3 wellness strategies: mobility, mindfulness, connection

Links:

Dean Pohlman on YouTube (Man Flow Yoga): https://www.youtube.com/user/ManFlowYoga

Man Flow Yoga app and membership: https://manflowyoga.com/join

Better Man Podcast on Instagram: @bettermanpodcast

Dean's book, Yoga Fitness for Men: https://amzn.to/4hJuZz5

Coach Allan's daily wellness tips newsletter: https://40plusfitness.com/tips

The Wellness Roadmap (Coach Allan's book): https://amzn.to/3U1xEdn