Dr. Stacy Sims

speaker

1,960 appearances 8 recordings 5 series first heard Jul 2024 last heard 9 Jul

Dr. Stacy Sims’s voice in public audio — every appearance, attributed to the second.

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recordings per month · last 12 months

Recordings per month over the last 12 months — 4 in all, peaking in Oct 2025 with 2.

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Feel Better, Live More with Dr Rangan Chatterjee · BITESIZE | What You Need To Know About Strength, Menopause & Healthy Ageing | Dr Stacy Sims #673 · 9 Jul 2026 podcast

But that doesn't fit into HIIT and strength training, but it fits into what I call soul food because it's good for my brain.

I like being outside, seeing my friends.

Exactly.

So when we start looking at something like resistance training, why is it so critical?

And we hear conversations out there where I'm talking about we wanna lift heavy loads, other people like just regular strength training.

When we start looking what's happening in perimenopause, the very first thing that happens before we see a loss in lean mass

is there's a disconnect the way our muscles contract because we have a change in some of the expression of our contractile protein.

So if we think about muscle contraction as a ladder that's coming together, we have myosin and actin and they bond together to pull fibers together to create a contraction.

When we start losing estrogen, we start losing the ability for myosin to hold on to actin strongly.

So we become weaker.

We don't have as much power.

When women are talking about this, they're like, I have a really difficult time opening a jar of pickles because my grip strength isn't there.

I might be a runner, but now all of a sudden my running pace is really slow and I don't know why.

Their body composition hasn't started to change yet, but their overall strength and power has.

Then about a year or so later, we'll start to see a significant loss of lean mass and an increase in body fat.

There are two things that are going on here.

One, we have that disconnect of estrogen and the way that it's affecting our muscle contractile strength, but we're also having a change in our gut microbiome.

Because when we start losing our sex hormones, we start losing some of the gut bugs that are responsible for some of the...

ways that these sex hormones are able to be pushed back out into circulation.

So we have a decrease in the diversity of our gut microbiome.

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