Falls, impact and bone strength.
After a fracture, finding low bone density can leave you wondering whether the accident or your bones were responsible. Both can contribute. This guide explains what the circumstances and scan results can tell you, and which questions help you make sense of them.
Yes: the force reaching that bone exceeded what it could withstand at that moment. When you put out a hand to stop a fall, force passes through the wrist. A hard landing can break a healthy wrist; reduced bone strength can make a fracture happen with less force. The break alone does not tell us which contributed most.
Low bone density is a relevant risk factor and may have contributed. But DXA measures bone density; it does not measure the force of your landing or reconstruct the accident. It cannot tell us whether that exact fall would also have broken a bone with higher density.
“Low bone density may have contributed” is different from “the scan proves that low bone density was the only reason it broke.”
A fragility fracture follows relatively low-energy trauma, commonly a fall from standing height or less. It can also occur during everyday activity without an obvious fall. “Low-energy” does not mean the fall felt gentle or the injury was minor. A painful, severe fracture can still meet this definition.
The word “traumatic” means an injury was involved, and a fragility fracture can follow an injury too. The clearer comparison is between low-energy and high-energy injuries.
An unexpected event explains why you lost balance or control. It does not, on its own, tell us how much force reached the bone or whether reduced bone strength contributed. These examples explain why the details matter; they cannot settle how an individual fracture should be classified.
A raised paving stone can trip someone who is otherwise fit and steady. The hazard is a real cause of the fall. If the person was walking and fell from standing height, a resulting wrist or hip fracture can still meet the usual fragility-fracture definition. An unexpected trip does not automatically make the event high-energy.
Record the obstruction, any change in level, how you fell and where you landed. The pavement hazard and possible bone fragility can both matter.
Ice can cause a sudden loss of footing and a hard landing. It explains why the fall happened, but does not rule out bone fragility. Sending body weight through an outstretched hand does not automatically turn a standing-height fall into high-energy trauma.
For a step, the height, movement and landing need to be considered. “One step” alone is not enough to settle the classification. Tell the clinician what actually happened rather than relying on a short label.
This can involve forward speed, a sudden stop and being thrown from the bicycle. It may involve substantially more energy than a simple standing-height fall. The fact that the rider started near standing height does not capture the whole event.
Being thrown over the handlebars at speed is a potentially high-energy injury. A slow topple from a nearly stationary bicycle can be quite different. The speed, height and landing need to inform the classification. A bicycle fall can break an otherwise healthy wrist.
Useful details include approximate speed, whether the wheel stopped suddenly, whether there was a collision or drop, and whether you landed on your hand, shoulder, hip or another surface.
Unexpected describes the surprise. Low-energy or high-energy describes the injury mechanism. These are different questions.
Not necessarily. Fragility fractures often occur even when the T-score is above the osteoporosis threshold; in fact, most happen in people whose T-score is in the low-bone-density or normal range. The fracture still provides useful information about future risk and warrants appropriate assessment.
Some guidelines go further: after a low-energy fracture of the hip or spine, they allow osteoporosis to be diagnosed on clinical grounds, whatever the T-score. Your clinician can explain which approach applies to you.
Equally, a major accident does not rule out low bone density. Research in older adults links both high- and low-trauma fractures with low density and increased risk of later fractures.
It helps identify relevant risk factors and options to reduce the chance of another fracture. DXA results are used alongside a fracture-risk assessment. The circumstances, age, previous fractures, falls, medicines and health history should all inform the discussion.
A favourable REMS Fragility Score can contribute reassuring information. It cannot retrospectively prove that a previous fracture was unrelated to fragility. Neither scan can assign an exact share of responsibility to the accident and the bone.
Uncertainty about the exact cause does not prevent useful decisions about nutrition, strength, balance, hazards and any other support your clinician recommends.
Your account of the fall matters. Your bone-health findings matter too. Understanding both helps guide a useful prevention plan.
Produced for educational purposes by the Education Directorate of IIMHE. This guide supports discussion and does not replace individual clinical advice. IIMHE · The Clear Picture · Practical Guides · Revised October 2026.
2nd February 2026 @ 20:00 GMT
Nutrition and musculoskeletal health
Given by: Dr Kimberley Zambito, Orthopaedic Consultant
Hosted by: Dr Nick Birch
Throughout 2026 and beyond, IIMHE (the International Institute of Musculoskeletal Health Education), in partnership with OsteoscanUK, will host a series of engaging educational webinars, open to anyone interested in bone and musculoskeletal health.
