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Osteoporosis, explained simply

Why it’s called the ‘silent thief’ — and why that’s actually hopeful.

4 min read · Medically reviewed by Dr. Emily Warren, DPT · Updated July 2026

Doctor of Physical Therapy (DPT) · BoneFit®-certified (Osteoporosis Canada) · LIFTMOR protocol–trained · Credentialed McKenzie (MDT) therapist · Mindful Movement Physical Therapies

Osteoporosis makes bones thin and porous, so they break more easily. It’s often called the ‘silent thief’ because bone loss happens with no symptoms at all — many people only find out after a fall or a fracture.

Bone is alive

Your skeleton isn’t inert scaffolding. It’s living tissue, constantly torn down and rebuilt by two crews of cells: osteoclasts that remove old bone and osteoblasts that lay down new bone. With age, the removal crew starts to outpace the rebuilding crew.

About 90% of your peak bone mass is built by age 20, and the rest by about 30. From the mid-30s we slowly lose bone — and for women, that loss speeds up sharply at menopause, to as much as 2–5% per year.

Here’s the hopeful part: because bone is alive and responds to load, the right exercise can slow loss and even rebuild density. You are not powerless.

Why fractures matter so much

A broken bone in later life isn’t a minor setback. Around 1 in 2 women and up to 1 in 4 men over 50 will break a bone due to osteoporosis. Hip fractures are especially serious — they can cost independence, and the statistics around them are sobering. Preventing that first fracture is the whole game.

Frequently asked questions

Can osteoporosis be reversed with exercise?

Bone is living tissue, so density can improve. In the LIFTMOR trial, postmenopausal women with low bone mass who did supervised high-intensity resistance and impact training gained bone density at the spine over eight months. Exercise won’t ‘cure’ osteoporosis, but the right loading can slow loss and rebuild some density — best combined with adequate calcium, vitamin D, and any medication your provider recommends.

What are the symptoms of osteoporosis?

Osteoporosis usually has no symptoms until a bone breaks — which is why it’s called the ‘silent thief.’ Some people notice height loss or a stooped upper back over time, which can signal spinal fractures. The only reliable way to detect it early is a DXA bone-density scan.

What is a normal bone density T-score?

A T-score of −1.0 or above is normal. Between −1.0 and −2.5 is osteopenia (low bone mass). −2.5 or lower is osteoporosis. The T-score compares your bone density to a healthy young adult’s.

Sources

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