Strength training for osteopenia: what actually helps

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Most women hear the word for the first time in their fifties. Sometimes earlier. A DEXA scan comes back with a number — a T-score — and a label attached: osteopenia, or one step further, osteoporosis. The doctor explains it in a few sentences. There's a script for calcium and vitamin D, maybe a referral, maybe a suggestion to "stay active." You leave the appointment knowing your bones are thinner than they were the last time anyone measured, and not much else.

This post covers what the diagnosis actually means, why the standard advice — walk more, take calcium — is incomplete, and what the research now says about the kind of strength training that genuinely changes bone density. It also explains why we built our Bone Defence class around that research, and how it differs from the general advice you've probably already been given.

Bone is not the inert scaffolding most people imagine. It is living tissue, constantly being broken down and rebuilt by two cell types — osteoclasts that remove old bone and osteoblasts that lay down new bone. Through your twenties and thirties, the rebuilding mostly keeps up with the breakdown. From around age 40, and more sharply after menopause, the balance tips. More bone is removed than replaced. Density drops.

A DEXA scan measures that density at the hip and spine and compares it to the average density of a healthy young adult. The result is given as a T-score:

• Above −1.0 is considered normal.
• Between −1.0 and −2.5 is osteopenia — bones thinner than the young-adult average, but not yet at the threshold for the formal osteoporosis diagnosis.
• Below −2.5 is osteoporosis.

These are statistical categories, not biological cliffs. A T-score of −2.4 and a T-score of −2.6 are functionally the same skeleton. What matters is what the number is doing over time, what your fracture risk actually is, and — critically — what you do about it.

The standard advice given to women with osteopenia tends to centre on three things: weight-bearing exercise (usually meaning walking), calcium and vitamin D, and in some cases, medication. None of these are wrong. They are just not, on their own, sufficient.

Walking is weight-bearing in the loosest sense — your bones are loaded by your bodyweight as you move. But the loads involved in walking are low, and bone responds to mechanical load in a dose-dependent way. The signal that drives bone to lay down new tissue is unaccustomed strain. Walking, for most adults, is well within what the skeleton has already adapted to. It maintains. It does not generally build.

Calcium and vitamin D supply the raw materials for bone formation. Without adequate intake, the body cannot rebuild bone effectively. But supplying raw materials is not the same as triggering construction. You can have plenty of bricks and no instruction to build a wall.

The instruction — the signal that tells bone to actually adapt — comes from mechanical load. And the load needed to drive density adaptation in adults with low bone mass is substantially heavier than the loads most people encounter in daily life.

The most-cited piece of recent evidence is the LIFTMOR trial, published by researchers at Griffith University in 2018. The trial took postmenopausal women with low bone mass and randomised them into two groups: a high-intensity resistance and impact training group (heavy deadlifts, overhead presses, back squats, and chin-ups, plus jumping drills), and a low-intensity home-based exercise group. After eight months, the high-intensity group showed significant improvements in spine and femoral neck bone mineral density, while the control group lost density over the same period.

What was striking was the intensity used. The participants were postmenopausal women with diagnosed osteopenia or osteoporosis — the exact population previously assumed to be too fragile for heavy lifting. They lifted heavy. They didn't get hurt. And their bones responded.

The signal that drives bone density adaptation in adults with low bone mass is the same signal that drove it when you were twenty: heavy load, applied progressively, in compound movement patterns. Bones are not a special case. They need the right input.

None of this means a woman with a low T-score should start deadlifting tomorrow without coaching. The intensity that drives adaptation in a coached, screened, supervised setting is not the same intensity to take on alone. But the framing many women have been given — that they are now too fragile to load — is not consistent with the evidence.

Training that drives bone density adaptation has a few specific features.

Heavy compound lifts. Deadlifts, squats, and presses load the spine and hips axially, in the directions where bone density loss is most consequential. Heavy means heavy enough that the last repetition of a set of five is genuinely difficult — usually expressed as RPE 7 to 9, where 10 would be the absolute maximum effort you could give. Light weights for high reps do not deliver the same stimulus.

Impact, applied carefully. The vertical ground reaction force from landing — even a small jump — appears to act as a bone density signal in its own right. Impact work has to be calibrated to the individual; for someone with significant fracture risk, low-amplitude landings or even just heel drops are appropriate starting points.

Reactive bracing. This is the piece that is often missed. Most fractures in older adults don't happen during exercise. They happen during a fall. The protective reflex that stops a stumble from becoming a fall — the trunk and hip muscles bracing fast enough to recover balance — is trainable. Perturbation drills, where the load on the body is unpredictable, develop this reflex in a way that static balance training does not.

Coached intensity. This is the piece that determines whether the training is safe. Heavy lifting in a coached, observed setting with appropriate progressions is safer than light lifting done with poor positions and no oversight. The intensity is real but the load is calibrated to the person, not to the average of the room.

Consistency over time. Bone remodels slowly. Meaningful density changes take months, not weeks. Most clinical guidance points to at least two sessions a week to drive adaptation, with the adaptation continuing as long as the training does.

This is what Bone Defence is built around. It's a 45-minute strength class, capped at eight people, that runs three times a week. Each session works through three primary compound movements at sets of five at RPE 7 to 9, plus a short reactive block that uses perturbation and low-amplitude impact to train the bracing reflex. Loads are tracked session to session so progress is visible. Coaching is constant — every set is observed, every load is calibrated to the person lifting it.

The class sits alongside our Movement & Strength and Longevity programs, which build the foundational movement quality and joint health that loaded strength work draws on. Bone Defence adds the specific stimulus — heavy axial load, impact, reactive bracing — that drives bone density adaptation directly.

The class is suitable whether you're training preventatively in your forties, responding to a recent DEXA result in your sixties, or working back from a specific concern. It is not the right class for someone with a current significant fracture risk or a history of vertebral fracture without clinician clearance — in those cases, we'll refer you to the exercise physiologists at Transcend Health, who share our building and program at the level of specificity those situations need.

If you've recently been told you have osteopenia or osteoporosis, the most useful thing you can do is to begin loading your skeleton, progressively, in a setting where someone is watching your positions and choosing your loads with you. Walking is good. Calcium is necessary. Neither is sufficient on its own.

You can come and try a Bone Defence class if you'd like to see how the class actually runs. Book a trial, or get in touch if you'd like to talk through your situation first.

Infuse Health is a boutique movement and wellness studio at 4/10 William Street, Adamstown. You can start with a 4-week intro, a personal training session, or a single class — whatever fits what you're working with. Bookings through infusehealth.au.