Your Muscles Are Medicine for Your Immune System | Menopause Hub
- infomenopausehub
- Mar 17
- 5 min read
Updated: Mar 24
The Extraordinary Secret Life of Your Muscles"The Four Superpowers of Muscle in Menopause"Part 3 — Immunity & Inflammation
Your Muscles Are Medicine for Your Immune System
How contracting muscles fight chronic inflammation — and why oestradiol decline makes this one of the most overlooked stories in menopause
By Anna Pattison | Registered Nurse, Clinical Myotherapist & Menopause Mentor | Menopause Hub
⚡ The Short Version
Most people know exercise is good for them.
Very few know why it goes so much deeper than fitness.
Every time your muscles contract, they release chemical signals that actively suppress chronic inflammation and support your immune system.
In menopause, oestradiol — one of the body's most important anti-inflammatory hormones — begins to decline. At the same time, muscle mass falls and activity often drops.
The result is a compounding loss of the body's two most powerful natural defences against chronic inflammation.
The Surprise
Your Muscles Are Your Immune System's Partner
Here is something most women have never been told.
Every time your muscles contract during exercise, they release anti-inflammatory signals into the bloodstream.
As we explored in Parts 1 and 2, these signals are myokines — chemical messengers released by contracting muscle.Over 650 have now been identified.And a specific group of them — including interleukin-6 and interleukin-10 — actively suppress chronic inflammation throughout the body.
Active muscle is one of your body's most powerful natural anti-inflammatory systems.
This is not a side effect of exercise.It is a primary biological function of skeletal muscle.
Which means exercise is not just good for fitness.Exercise is medicine for your immune system.
The Hormone Connection
Oestradiol — Your Body's Built-in Anti-Inflammatory
Oestradiol — the most biologically active form of oestrogen — has direct and significant anti-inflammatory properties.
Oestrogen receptors are found throughout the immune system.Oestradiol suppresses the production of pro-inflammatory cytokines, including TNF-α and IL-1β.It helps regulate immune responses and keeps chronic inflammation in check.
In perimenopause, as oestradiol levels begin to fluctuate and fall, that built-in anti-inflammatory protection weakens.
The body becomes more vulnerable to chronic low-grade inflammation — sometimes called inflammageing.
Over time, this contributes to cardiovascular disease, insulin resistance, cognitive decline and accelerated biological ageing.
And when both oestradiol and muscle mass decline together, the loss of anti-inflammatory protection compounds.
The Compounding Effect
When Two Protective Systems Change
Oestradiol declines — removing its direct anti-inflammatory and immune-regulating role
Muscle mass decreases — reducing the body's capacity to produce anti-inflammatory myokines
Activity often drops in response to fatigue and symptoms — removing the movement that triggers those myokines in the first place
Less muscle means less natural protection against chronic inflammation.
Pause for a moment.
If you remember one thing from this section, let it be this:
Your body has two powerful built-in defences against chronic inflammation.
Oestradiol — which suppresses inflammatory signals throughout the body.
And active muscle — which releases anti-inflammatory myokines every time it contracts.
When oestradiol's anti-inflammatory role diminishes, your muscles may be your most important remaining defence.
What this looks like in real life
You feel more run down than you used to.
Recovering from illness takes longer than it once did.
You seem to pick up every bug going around.
Brain fog, fatigue and low mood that doesn't fully lift.
A body that feels more inflamed — more reactive, more tired.
These experiences are not random.
They are signs of a body navigating a significant shift in its natural anti-inflammatory systems — and they have an explanation.
What You Can Do
What Actually Moves the Needle
The most powerful thing you can do for your immune resilience in menopause is also the most powerful thing you can do for your brain and your metabolism.
Build and protect your muscle.
Resistance and aerobic exercise — your anti-inflammatory prescription
Every resistance training session and every aerobic workout triggers myokine release.That means every session is actively working to suppress chronic inflammation.
In Parts 1 and 2 we covered the exercise prescription in detail — compound resistance movements, 2–3 times per week, aerobic activity most days.The immune benefits are one more reason that prescription matters.
Consistency is what builds the anti-inflammatory effect over time.
Protein — the foundation
Adequate protein supports muscle maintenance and repair — which maintains the capacity to produce anti-inflammatory signals.
As covered in Part 2, aim for 1.2–1.6g per kilogram of body weight daily, distributed across meals.
MHT — restoring the hormonal defence
Restoring oestradiol through MHT does not just address hot flushes.
It restores one of the body's primary anti-inflammatory systems.
Oestradiol directly suppresses pro-inflammatory cytokines, supports immune cell function and helps regulate the immune responses that — when chronically activated — accelerate biological ageing.
The immune and anti-inflammatory case for MHT is compelling — and it is rarely discussed in the same conversation as hot flushes and sleep.
This is a conversation worth having with a clinician who understands the full picture.
Key Takeaways
Contracting muscles release anti-inflammatory myokines — active muscle is one of the body's most powerful natural defences against chronic inflammation
Oestradiol has direct anti-inflammatory properties, suppressing pro-inflammatory cytokines and regulating immune cell activity — its decline in menopause removes a key layer of protection
Muscle loss and reduced activity compound the effects of oestradiol decline — the body loses both its hormonal and muscular anti-inflammatory systems simultaneously
Chronic low-grade inflammation — inflammageing — is linked to cardiovascular disease, insulin resistance, cognitive decline and accelerated ageing
Resistance training, aerobic exercise and MHT are the primary evidence-based strategies for restoring these protections
Exercise is not just good for fitness. It is medicine for your immune system.
Your muscles are not just moving your body.
They are your immune system's most active partner —fighting inflammation every time they contract.
The connection between muscle, inflammation and immune function during menopause is one of the least talked about — and most important — pieces of this puzzle.
If you want a clear summary of the key changes happening in your body right now, the free Menopause Quick Reference Guide is a good place to start.
References
Australasian Menopause Society (2023). Menopause hormone therapy position statement. menopause.org.au
Blumming AZ & Tavris C (2018). Estrogen Matters. Little, Brown Spark.
British Menopause Society (2022). BMS consensus statement on HRT. thebms.org.uk
Cannon JG (2000). Inflammatory cytokines in nonpathological states. News in Physiological Sciences, 15, 298–303.
Menopause Society of Canada (2022). 2022 Menopause Society of Canada position statement. menopausecanada.ca
North American Menopause Society (2022). The 2022 hormone therapy position statement. Menopause, 29(7), 767–794.
Pedersen BK & Febbraio MA (2012). Muscles, exercise and obesity: skeletal muscle as a secretory organ. Nature Reviews Endocrinology, 8(8), 457–465.
Straub RH (2007). The complex role of estrogens in inflammation. Endocrine Reviews, 28(5), 521–574.
👉 Next: Part 4 — Bones & the Musculoskeletal Syndrome of Menopause
The Extraordinary Secret Life of Your Muscles
Approximately 70% of women experience the Musculoskeletal Syndrome of Menopause — a cluster of changes affecting muscle, bone, joints and tendons that most women are never told has a name.
In Part 4 we explore why osteoporosis is not just a calcium story. How your muscles signal directly to your bones during exercise. And what the Musculoskeletal Syndrome of Menopause means for the 70% of women who experience it.
© 2026 Menopause Hub | menopausehub.com.au
For educational purposes only. This is not medical advice. Please consult your healthcare provider.
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