This Stanford PhD Reveals Why Lifting Heavy Weights 3x a Week Rewires Your Brain During Menopause (It’s Not About Muscle)

Menopause doesn’t have to feel like something happening to you.

In a recent episode of the Mel Robbins podcast, Stanford University researcher Dr. Stacy Sims returned to share groundbreaking insights about menopause, hormones, and how women can take control during this transformative life stage.

What she revealed might completely change how you think about your body’s changes.

And the best part? You have more power than you realize.

Menopause Is Like Reverse Puberty—Here’s What That Means

Dr. Sims offered one of the most illuminating explanations of menopause ever heard on the podcast.

Think back to puberty—the awkwardness, the body changes, the shifting center of gravity, the mood swings. All driven by rising hormones flooding your system.

If we think about puberty and all the things that are happening from the perspective of a young girl’s body, if we’re taking it to the other side of things where we start to unpack everything and we’re not having estrogen and we’re not having progesterone, every system in the body takes a hit.

Menopause is essentially the opposite process. Your body is unwinding what it built during puberty.

Estrogen and progesterone aren’t just “female hormones”—they’re keys that unlock functions throughout your entire body. When those keys disappear, receptors are left searching.

What Actually IS Menopause?

Let’s get the terminology straight first.

Menopause is one day on the calendar—the day marking 12 consecutive months without a period. That’s it.

When we talk about the definition of menopause, I tell people it’s another birthday because what it marks is one day on the calendar of the preceding 12 months of no periods.

The years before that date? Perimenopause.

Everything after? Postmenopause.

Understanding this distinction matters because the strategies Dr. Sims recommends apply across all these phases.

Every System in Your Body Takes a Hit—From Head to Toe

Dr. Sims walked through exactly what happens when estrogen and progesterone levels drop.

Spoiler: It’s not just hot flashes.

Your Brain

Estrogen drives serotonin and dopamine production—the neurotransmitters responsible for mood regulation and that feeling of calm.

When estrogen drops, your brain’s chemical messengers go haywire. One minute you feel great, the next you don’t.

Estrogen also supports brain metabolism—how your brain fuels itself with glucose. Without it, brain function can slow, contributing to brain fog.

Your Belly (The “Menopot”)

That stubborn belly fat isn’t just annoying—it’s visceral fat, the dangerous kind packed around your organs.

Dropping estrogen increases inflammation, which changes how fat molecules circulate. Your liver reads them as something to store—right around your midsection.

We start to have more what’s called esterified fatty acids. It’s a change in our fat molecules that circulate in our blood and they’re read by the liver as something that needs to be taken up and stored as visceral fat.

Your Muscles

Estrogen is directly responsible for muscle strength, contraction power, and lean mass development.

Without it, muscles feel weaker and “squishy.” Even opening a jar becomes harder.

Estrogen also supports acetylcholine—a neurotransmitter that allows nerves to trigger muscle contractions. Less estrogen means slower, weaker contractions.

Your Gut

Your gut microbiome—the trillions of bacteria living in your digestive system—loses diversity during menopause.

This affects vitamin production, serotonin creation (95% is made in the gut), and even cravings.

You might crave carbs when your body actually needs protein—a disconnect Dr. Sims calls the “protein leverage effect.”

Your Tendons and Ligaments

Two of the most common injuries during perimenopause? Frozen shoulder and plantar fasciitis.

Estrogen receptors exist in tendons and ligaments. Losing estrogen weakens these connective tissues, making injuries more likely.

You Can Rewire Your Body to Thrive—Here’s How

Here’s where the conversation gets exciting.

Dr. Sims doesn’t just explain what’s happening—she provides a science-backed blueprint for taking control.

You’re literally rewiring your body to work with what you have in it.

The key? Strength training.

Why Strength Training Changes Everything

When you lift heavy weights, your body experiences stress. Your brain says, “We need estrogen to handle this load!”

But estrogen isn’t there anymore.

So your body adapts. It finds other pathways. It produces more acetylcholine. It builds new neural connections.

If you are creating a new pathway or a stronger pathway to be able to lift that load, it improves the neuroplasticity of the brain.

You’re not just building muscle—you’re rewiring your nervous system to function without estrogen.

And here’s the kicker: Women who start lifting in their 50s often become stronger and leaner than they were in their 30s.

Dr. Sims’ Ideal Strength Training Protocol

Forget spending hours in the gym. Dr. Sims’ approach is about quality over quantity.

For Beginners: Start Here

• 10 minutes, 3 times per week
• Use body weight or light dumbbells
• Focus on functional movements: squats, push-ups, overhead press

That’s it. Just start moving against resistance.

The Ideal Program

Three days per week, total-body heavy lifting:

• Monday: Squat-focused (3 sets of 5 reps at 80%, then 2 sets of 3 at 85%)
• Wednesday: Push-pull (bench press, overhead press)
• Thursday: Deadlifts and hip thrusts (glutes and posterior chain)

Each exercise follows the same pattern: lift heavy, rest fully (3 minutes between sets), repeat.

Total time? About 15-20 minutes per session.

It’s not about volume, it’s about the quality of the work that you are doing.

What About Cardio?

Dr. Sims had strong words about popular fitness classes marketed to women over 40.

Classes like Orange Theory and F45? Not appropriate for perimenopausal and postmenopausal women.

Why? They keep you in moderate intensity—too easy to create change, too hard to allow recovery.

The result? You feel smashed, can’t sleep, stay stressed, and don’t lose belly fat.

What You Should Do Instead

Sprint Interval Training (SIT):

• Go as hard as you possibly can for 30 seconds (or less)
• Recover fully for 90 seconds to 2 minutes
• Repeat 2-3 times

Use an assault bike, battle ropes, kettlebell swings, or sprinting. Make it a “finisher” after strength training.

The key is intensity and recovery—not endless moderate effort.

Nutrition: The Biggest Mistakes Women Make

Dr. Sims sees the same pattern repeatedly: women cut calories and increase training when they start gaining weight.

This is exactly backward.

We need to drop the training and increase the food.

Protein Is Non-Negotiable

Aim for one gram of protein per pound of current body weight.

Yes, that sounds like a lot. But it’s doable when you diversify sources:

• Mixed greens with green peas, nuts, seeds, black beans, feta, and chicken = 30-40g
• Protein coffee (protein powder + milk + espresso) = 30g

Spread protein across meals, and you’ll hit your target.

Don’t Fear Carbs

Women in menopause actually need more carbohydrates—but the right kind.

Focus on fruits, vegetables, and whole grains. They support insulin sensitivity and feed gut bacteria.

Sleep, Stress, and Supplements That Actually Work

Dropping estrogen and progesterone wreaks havoc on your autonomic nervous system—the system controlling heart rate, breathing, and stress response.

Result? You’re “tired but wired.”

Mindfulness Beats Medication

Recent research shows cognitive behavioral therapy is more powerful than menopause hormone therapy for improving sleep.

Mindfulness is one key component. Even 5-10 minutes daily makes a difference.

Supplements Dr. Sims Recommends

• L-theanine: Activates parasympathetic (calming) response
• Apigenin: Found in chamomile, promotes relaxation
• Creatine monohydrate (3-5g daily): Supports brain metabolism, helps women exit depressive episodes faster than SSRIs alone

If it saturates the brain, we see that there is research to show women who are using 3 to 5 grams of creatine can get out of a depressive and anxious episode a lot faster.

Menopause Hormone Therapy: A Tool, Not a Magic Bullet

Dr. Sims is clear: Menopause hormone therapy (MHT) is valuable—but it’s not the complete answer.

MHT slows the rate of change but doesn’t stop it.

You’ll still experience fat gain, muscle loss, and bone density decline—just at a slower pace.

You still have to do the work. Strength training, proper nutrition, stress management—these aren’t optional.

The Four Buckets of Menopausal Health

Dr. Sims recommends focusing on one area at a time over 2-3 weeks:

1. Mindfulness and sleep
2. Physical activity
3. Nutrition
4. Community/social connection

Pick one. Make progress. Then move to the next.

Small, consistent changes compound into transformation.

The Empowering Truth About Menopause

Dr. Sims’ final message was powerful:

I want women to go away not being afraid because it’s such an amazing powerful tool to have to have that education and to be able to invoke change to improve how you’re feeling in the moment and also how you’re feeling 5, 10, 15 years down the line.

Menopause isn’t a disease. It’s not a deficiency syndrome.

It’s a natural transition—and with the right knowledge and tools, you can thrive.

Strength training rewires your body. Proper nutrition fuels adaptation. Mindfulness calms your nervous system.

You’re not a victim of menopause. You can face it. Control it. Master it.

The keys may be out of the locks—but you’re learning to open doors in entirely new ways.