6-WEEK STRENGTH-BASED YOGA · WOMEN 40+
Build real muscle.
Keep it this time.
Most programs give you a workout. This one gives you a body that actually changes.
Without punishing yourself to do it.
2x sessions a week. 12x flows. 3x phases. A progressive yoga program built specifically around how your body builds *STRENGTH* in your 40s, not how it did at 32, and not how it works in someone else's body. Yours. NOW.
12 PROGRESSIVE YOGA FLOWS
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THE CORE METHOD THAT GIVES YOU RESULTS
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BUILT FOR MIDLIFE BODIES
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2 SESSIONS A WEEK
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12 PROGRESSIVE YOGA FLOWS / THE CORE METHOD THAT GIVES YOU RESULTS / BUILT FOR MIDLIFE BODIES / 2 SESSIONS A WEEK /
01
THERE'S AN ELEPHANT IN THE ROOM
Your yoga practice might be the reason you're not getting stronger.
Not because you're doing it wrong. Not because you're not trying hard enough. But because the practice you've been loyal to for years was never designed to do what you're asking it to do right now.
It was built for flexibility, for calm, for moving beautifully. All of that is real and worth something.
**But feeling worked and getting stronger are two completely different things, and in your 40s, with a body that is genuinely, hormonally different from the one you had at 32, the gap between those two things is where all your effort has been quietly disappearing.
It's the 6am alarm you still set. The class you still show up to. The effort that is genuinely there, and the results that aren't. And the slow, creeping suspicion that other women aren't having this problem. That you're the one missing something. That your body has decided, specifically, to be difficult.
It hasn't. You're not missing anything. You just haven't been given the right information yet.
02
THE MECHANISM - WHAT’S ACTUALLY HAPPENING
Estrogen is a muscle hormone. And yours is changing.
We talk about estrogen in terms of cycles, of hot flushes, of mood. What we almost never talk about, and what I think every woman in her 40s deserves to actually understand, is *WHAT* estrogen does in your muscles.
It drives the process by which your body builds new muscle tissue after training. It maintains the collagen density in your connective tissue. It manages inflammation in your joints after effort. It signals your muscles to repair themselves.
When it starts declining, which it does, gradually, from your late 30s, and then more noticeably in perimenopause - ALL OF THAT SHIFTS AT ONCE.
03
THIS IS THE PART THAT CHANGES EVERYTHING
Your body is still willing. It just needs a different signal.
The training that worked at 32 was designed for a body with stable estrogen. High recovery capacity. High collagen. Muscle that responded relatively quickly to effort and held on relatively easily between sessions.
That's not the body you're in now. And no amount of trying harder in the same programme is going to change that.
⚡You need more recovery between sessions, not less. ⚡You need progressive load that builds gradually, not intensity that spikes and crashes.
⚡You need repetition; the same patterns, practiced consistently, because that's how the nervous system in a midlife body actually learns to recruit muscle.
Women naturally lose 3 to 5% of muscle mass per decade from their 30s onward
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the rate accelerates during perimenopause.
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Strength isn't something that just fades with age
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It fades when the training doesn't adapt to the hormonal environment.
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Women naturally lose 3 to 5% of muscle mass per decade from their 30s onward / the rate accelerates during perimenopause. / Strength isn't something that just fades with age / It fades when the training doesn't adapt to the hormonal environment. /
SO WHAT'S THE ALTERNATIVE?
The same effort. A completely different result.
The problem has never been your commitment.
KEEP TRAINING THE WAY YOU HAVE BEEN. OR TRAIN THE WAY YOUR BODY ACTUALLY RESPONDS.
The choice isn't yoga or no yoga.
It's which kind of yoga, and whether it's designed around what your body needs now, or what it needed ten years ago.
What hasn't been delivering
🤫 Sessions designed around flexibility, not load
🤫 No progression. Same effort, same result, week after week.
🤫 Volume your 40s body can't recover from properly
🤫 Programs built for stable estrogen. Yours isn't.
🤫 Starting over repeatedly because nothing sticks
What Fortify40 2.0 does instead
🛠️ 3x progressive phases - each week builds on the last
🛠️ Bodyweight loading that creates actual strength stimulus
🛠️ 2x sessions a week. Enough to spark change. Enough to recover.
🛠️ Built around perimenopause physiology, not despite it
🛠️ Short enough to actually repeat. Structured enough to actually work.
YOUR BODY DOESN'T NEED MORE VOLUME. IT NEEDS THE *RIGHT KIND OF CHALLENGE*, APPLIED CONSISTENTLY, WITH ENOUGH RECOVERY TO ACTUALLY RESPOND. THAT'S WHAT THIS PROGRAM DELIVERS.👇💛
THE BIGGER PICTURE
This isn't about how you look.
It's about what you can do for the next thirty years.
Muscle isn't just about aesthetics, though yes, that's a nice bonus. It's structural. It's your bones. Your metabolism. Your joints. Your ability to carry things, move without bracing, and feel capable as you age. And in midlife, all of those systems are under pressure at the same time.
And here's what nobody usually says clearly: yoga CAN build this.
Not all yoga. But strength-based yoga, sequenced with intention and loaded progressively, has real research behind it for improving muscle mass, bone density, and balance in perimenopausal women.
That's the science. Fortify40 2.0 is the application.
3–5% MUSCLE LOSS PER DECADE IN WOMEN FROM THEIR 30S ONWARD
4×MORE LIKELY TO DEVELOP FROZEN SHOULDER BETWEEN THE AGES OF 40 AND 60
71% OF WOMEN EXPERIENCE MENOPAUSE-RELATED MUSCLE AND JOINT SYMPTOMS
INTRODUCING....
FORTIFY 40 2.0
Six weeks. Two sessions a week. Twelve flows that build on each other across three phases. Built for women in their 40s who want to build strength, feel it in their body, and keep it.
✨ Thank you for creating a space for woman like me. I don’t get it 100% perfect but, finally I understand it’s more important to acknowledge and respect where your body and mind is on that particular day.
best offer
best offer
Not yoga for performance. Not yoga for how it looks.
Yoga that teaches your body to produce force, stabilise joints, and move with genuine control. The kind of practice that makes daily life feel different, because it's actually making you stronger, not just tired.
The CORE Method. Your hormonal reality, finally accounted for. A structure you can follow. A result you can feel.
THE FRAMEWORK BEHIND EVERY SESSION
The CORE Method
Every session in this program runs on 4x principles. Together, they're the reason two sessions a week builds more than five sessions of random effort ever did.
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C = Consistency >> Two sessions a week, 30 to 45 minutes. Designed around your actual life, not the version of it where you have unlimited time and energy. The rhythm you can hold even on the hard weeks.
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O = Order >> Every movement has a reason. Every session builds on the one before it. You always know what you're doing and why — no improvising, no starting from scratch, no guesswork.
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R = Repetition >> Repetition isn't boring. It's how the nervous system actually learns. How muscle fibres recruit. How strength builds, and stays, in a body that responds to consistent signal, not constant novelty.
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E = Engagement >> Not passive. Not zoning out. You're learning to feel what your body is doing, breathe when it gets hard, and move with actual intention. That reconnection is part of what changes things.
INSIDE THE PROGRAM
Fortify40 2.0 is split into 3x progressive phases. Each one builds on the last. Each one has a specific job to do in your body.
3x phases. 6 weeks. one through-line.
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Shoulders - Weeks 1 & 2
We start with your shoulders because they support almost every upper body movement. Planks, Downward Dog, transitions, pushing, carrying. If your shoulder girdle isn't stable, everything above and below it compensates.
These 2x weeks build real shoulder strength, improve stability in weight-bearing positions, and reduce the excess neck and upper trap tension that comes from years of a body holding on too hard in all the wrong places.
By the end of Phase 1, you'll feel more controlled, more aligned, and more confident just putting your hands on the ground.
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Core - Weeks 3 & 4
Not the surface abs. The deep stabilizers. The muscles that support your spine in every movement you make on the mat and in daily life. When these go offline, everything compensates: the lower back, the hip flexors, the neck. The problems you feel elsewhere often start here.
These 2x weeks activate your deep core, build stability through your hips, shoulders, and spine, and improve balance and control in a way that carries directly into how you move through your actual days.
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Hips and legs - Weeks 5 & 6
Your lower body is your base. Weak hips and unstable legs mean everything above them is working harder than it should. This phase builds the strength that grounds everything else: glutes, quads, the hip stabilizers that govern your balance and joint health for decades.
By the end of Phase 3, everything from the first four weeks integrates. You'll feel it in standing work, in transitions, in the way you walk up stairs and carry things and move through a day without bracing and hoping for the best.
WHAT'S INSIDE FORTIFY40 2.0 *
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WHAT'S INSIDE FORTIFY40 2.0 * /
EVERYTHING INSIDE
Here is what you are getting
12 progressive strength-based yoga flows across three phases, each building deliberately on the last. 30 to 45 minutes per session.
A structured weekly rhythm - two sessions a week, released on a schedule so you always know what to do and when. No guessing, no program-building yourself.
Step-by-step alignment cues and modifications in every recording so you can practice safely and effectively wherever you are in your strength journey
Weekly personal check-ins from me {Hi, 👋}- direct support to answer questions, troubleshoot what's coming up, and make sure you're not navigating this alone
Private community of women in their 40s working the same program. Real conversations, not a highlight reel.
🎁 Chaturanga Dandasana: Foundation Stage {$47 Value} - a full anatomy breakdown of the pose most women have been forcing for years. Understand how it's actually supposed to work in your body.
🎁 Habits That Stick Workbook {$47 Value} - the practical system for turning a 6-week program into a practice that doesn't disappear when the six weeks end
Lifetime access to all sessions, all materials, all future updates. Come back to it whenever your body needs it.
Includes Course Lifetime Access. Price in USD.
AFTER SIX WEEKS
What you will walk away with
Not just how you'll feel. What you'll actually have, in your body, in your practice, and in how you move through your days.
Hold a plank with steady arms instead of shaking through it and collapsing at twenty seconds
Move through a chaturanga with control, not just surviving it, actually understanding it
Feel your deep core activate in balance poses, transitions, and standing work
Carry things, sit tall, move through a full day without bracing or compensating
Repeat the practice independently, because the CORE Method builds a system, not a dependency
** And beyond the physical: a real understanding of what your midlife body needs and how to keep giving it that. Not just for these six weeks. For the decade ahead.
The quiet confidence of a body you've actually been building. Not managing. Building.
REAL WOMEN, REAL RESULTS
What they said
Hi, I'm your yoga teacherNatalia Rennie
18 years of practice
3,400+ teaching hours
47 years old
I'm 47. I built this program from the inside of the exact experience you're having, not from the outside looking in at it.
I've been practicing yoga for 18 years and teaching for nearly a decade. In that time, I've watched how the conversation around women and strength training has shifted - and how much of it still misses what actually happens in a midlife body. The hormonal picture. The recovery needs. The way effort that worked at 32 stops working at 44 and nobody tells you why.
That's what this program is built on. Not theory. Not someone else's template with a midlife sticker on the front. A decade of teaching women in their 40s, 3,400+ hours of real experience, and the kind of understanding that only comes from living this transition yourself.
My commitment to you is the same as it's always been: to help you build consistent habits that strengthen your body and steady your mind. So you can move through midlife feeling capable and at home in your own skin.
I became a certified yoga teacher in 2016. At first, clients didn’t come easily. I focused on showing up, gaining hours, and sharpening my skills.
Somewhere in that journey, I discovered my true passion: helping women feel stronger and more at home in their bodies.
Six weeks from now, you could feel genuinely stronger.
Or you could still be putting in effort that doesn't quite add up. The program is here. The decision is yours.
Is this for you?
This was built for you if...
You're a woman in your 40s navigating the real physical shifts of perimenopause
You've been practicing yoga and want to know it's actually building something
You're not brand new to yoga -you know the basics, and you're ready to go further
You want structure. A program that tells you exactly what to do and when, without requiring five days a week to do it.
You're tired of effort that feels like it disappears. You want it to compound.
You're ready to commit to yourself, and you just need the right container to do it in
This is probably not the right fit if...
You want quick results. Six weeks of two sessions a week builds real, lasting strength - it's not a five-day transformation.
You're only here for flexibility or relaxation. These flows will challenge you. That's the point.
You're not willing to show up twice a week consistently. The CORE Method works because of consistency. Without it, it's just content.
You prefer live, in-person classes. This program is self-paced and fully online.
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Natalia has the most soothing voice and is incredible at describing the next movement.
As somebody who has never practised yoga before this was important. But I always feel confident during the practice.
Rebecca v.d. V., 40
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Natalia’s classes are a superb combination of safe space and gentle encouragement.
The fact that 20+ years later, I am still learning new things about my yoga practice, my body and its abilities and the relaxation yoga affords.
Amy J., 45
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Natalia creates a beautiful energy in the room for her students.
I love the introspective beginning and end to the lessons.
Doris G., 49
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Your passion enthuses me.
I like the more private setting, and I think your classes are very well structured.
Leah G., 63
READY WHEN YOU ARE
Join Fortify40 2.0
$237
Lifetime access. Start any time.
12 progressive strength-based yoga flows
3-phase structured program - 6 weeks, 2 sessions/week
Weekly personal check-ins from Natalia
Private community of women 40+
Chaturanga Foundation Stage bonus
Habits That Stick Workbook bonus
Lifetime access and all future updates
Includes Course Lifetime Access. Price in USD.
Cinzia C., 45“I’m not sure you realize that your program is more than just another exercise program. You are providing a space for women who are at a transitional stage of their lives to learn to be accepting and kind to themselves, as well as build a healthy, strong body and mind.”
Your satisfaction is my priority!
If you’re not happy with the program, NO stress. Just send me an email within 7 days of purchase, and I’ll issue a full refund within 24 business hours. No questions asked.
QUESTIONS
The things you're probably wondering
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This program is designed for women who know the basics of yoga - you don't need to be experienced, but complete beginners may find the pace challenging.
If you can hold a plank {even for a few seconds}, move through a Sun Salutation, and find a Downward Dog, you have what you need to start.
Every session includes modifications and step-by-step cues so you can work at your level throughout.
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YouTube gives you individual sessions. This gives you a system. The difference is progression.
Each session in Fortify40 2.0 is designed to build on the last - so your body isn't just repeating effort, it's compounding it.
Random classes feel good in the moment. They don't add up to strength the way structured progressive training does. Especially in your 40s, where the stimulus needs to be intentional for the body to respond.
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Every session includes modifications and options so you can adapt to what your body needs that day. That said, if you're managing an active injury or a recent diagnosis, please check with your healthcare provider before starting.
These sessions are designed for educational purposes and are not a substitute for medical advice.
Listen to your body - and if something doesn't feel right, adjust or skip it.
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The program is designed around 2x sessions a week because that rhythm creates enough stimulus for strength to build and enough recovery for your body to respond. One session a week will maintain mobility and body awareness but is unlikely to produce the strength gains the program is built for.
You have lifetime access - if a week gets away from you, just pick up where you left off.
The only failure mode here is stopping entirely.
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A yoga mat. Optionally a pair of blocks and a strap. That's it.
No gym, no weights, no special setup. Your bodyweight, intelligently applied, is the load.
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You get instant access to a private membership site where all content is organized in one place.
2x new classes are released each Tuesday, giving you a steady rhythm.
Everything is mobile-friendly and accessible anywhere. You also get a free app for easy on-the-go use.
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I want you to feel confident stepping into this program, which is why I offer a 7-day money-back guarantee starting from the first day of the program on September 30th.
If you find out within that first week that it’s not the right fit, you can request a refund and receive your full investment back. {You’ll also be removed from the membership portal if you decide to step away.}
After the initial 7-day period, no refunds will be available, so my encouragement is to give yourself those first classes to truly feel into the program before deciding.
Because when you commit and see it through, that’s when the shifts, strength, tone, mobility, focus, REALLY begin to show.
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Send me an email at natalia@natalirennie.com. I’m happy to help. 💛
Still have questions »
disclaimer
If you're new to yoga, returning after a long break, or recovering from an injury or illness, please check in with your doctor or physical therapist before purchasing or practising these classes online. By joining, you acknowledge that you're practising at your own risk. These sessions are designed for educational purposes only and are not intended to diagnose, treat, or cure any injury, illness, or condition. Please use your own judgement, listen to your body, and practise safely.