The Real Reason Your Body Isn’t Playing Fair (the midlife metabolism plot twist)

You know that situation where you’re doing all the right things… eating pretty much the same as someone else, moving your body, trying to be consistent… and yet your body just isn’t responding the same way?

It’s frustrating. And if we’re being honest, a little bit insulting.

Because it looks like it should work.

So naturally, your brain goes to:
I must be doing something wrong.
I need to try harder.
Maybe I’ve just lost my discipline somewhere along the way.

But here’s where it gets interesting—and honestly, a bit of a relief.

There’s a very real, very biological reason this happens, and it has nothing to do with you being lazy or inconsistent.

Your Metabolism Has a Personality (and it picked it without asking you)

Researchers have found that when it comes to how our bodies handle food (or the lack of it), we tend to fall into one of two camps.

Some bodies are what we’d call thrifty.
Others are spendthrift.

And before you roll your eyes, this isn’t just cute terminology—it actually explains a lot.

When food intake drops—whether that’s dieting, skipping meals, or even just eating less because you’re not that hungry—some bodies respond by tightening everything up. They slow down calorie burn, conserve energy, basically go into quiet little survival mode.

That’s your thrifty type.

Other bodies? They barely flinch. They just keep ticking along, burning energy at roughly the same rate regardless.

That’s your spendthrift.

Now here’s the kicker.

This difference isn’t small. Over time, it’s the difference between weight loss feeling relatively straightforward… or feeling like you’re dragging a sled uphill in thongs.

The Bit That Really Messes With Your Head

You’d assume the 'thrifty' body is just naturally slow, right?

Like, “oh great, I got the dud metabolism.”

Not even close.

When food is coming in normally, thrifty women actually burn more energy than the spendthrift ones.

I know....

But the moment you create a calorie deficit—whether intentionally (dieting) or unintentionally (hello, GLP-1s)—that same body goes, absolutely not, and pulls back hard.

So it’s not that your metabolism is broken.

It’s that it’s incredibly good at protecting you when it senses things might be getting a bit scarce.

Which, in 2026… is wildly unhelpful.

Then Midlife Turns Up and Adds Its Own Chaos

Because of course it does.

By the time you hit perimenopause and beyond, your body is already juggling a fair bit behind the scenes.

Oestrogen is shifting. Muscle mass becomes easier to lose (and harder to build if you’re not intentional about it). Energy can feel a bit hit-and-miss. Even your unconscious movement—things like fidgeting, pacing, general getting about—can quietly drop off.

So if you’ve got a naturally thrifty metabolism in that environment?

It’s not that your body is working against you.

It just becomes… extremely efficient.

And suddenly all those old rules—eat less, move more, job done—stop working the way they used to.

And If You’re On GLP-1s, This Still Applies

This is where a lot of women get caught off guard.

GLP-1 medications can be brilliant for reducing appetite. For many women, they’re the first time in years they’ve felt a bit of breathing room around food.

But they don’t change your underlying metabolic type.

So if you’re eating significantly less (which is often the case), and your body is naturally thrifty… it will adapt.

Not overnight, but enough that things can slow, energy can dip, and that little voice of “why has this stalled already?” starts creeping in.

It’s not that it’s not working.

It’s just that your body is doing exactly what it’s designed to do—keep you alive, not lean.

So What Actually Helps (without turning your life into a full-time job)

This isn’t about doing more for the sake of it. If anything, it’s about being a bit more strategic and a lot less extreme. Because the harder you push a thrifty metabolism, the harder it tends to push back.

What tends to work better is keeping things… steady.

Not tiny portions and white-knuckling your way through the day, but a moderate deficit your body doesn’t immediately panic over.

Keeping protein up becomes less of a 'nice to have' and more of a quiet non-negotiable—because that’s what helps you hold onto muscle, which is essentially your metabolic leverage.

And then there’s movement—but not just the sweaty, structured kind. The everyday stuff. Walking more, staying generally active, not letting your world shrink to chair → car → chair again. That low-level movement does more heavy lifting than it gets credit for.

Even pulling back occasionally—eating at maintenance for a bit—isn’t failure. It’s often the thing that stops you from going completely off the rails later.

The Part Most Women Need To Hear (and rarely do)

If you’ve spent years feeling like your body is just harder work than everyone else’s…

You’re probably not imagining it.

Some bodies are more resistant to weight loss. Some bodies do regain more easily. And some bodies are just wired to be incredibly good at conserving energy.

That’s not a character flaw.

It just means the approach that works for someone else—the one who can slash calories, drop weight quickly and move on with their life—was never designed for you in the first place.

Once you see that, something shifts.

You stop chasing extremes.
You stop blaming yourself.
And you start playing a slightly longer, smarter game.

Which, in midlife, is actually where the magic happens anyway.

XO Jane