Bone loss nobody sees on site: what World Osteoporosis Day means for manual labour teams

Think about the last time someone on your site slipped from a ladder rung, or stepped off a platform badly. Most of the time, the worker gets up, swears, and gets on with the job. That is bone doing what it should.

Bone health is the part of occupational health that nobody sees on a site. There is no gauge for it, and nothing on a toolbox talk sheet. World Osteoporosis Day, on 20/10/2026, is a reasonable moment to ask the question out loud.^[4]

What osteoporosis is, in plain terms

Osteoporosis is a disease in which the skeleton weakens and bones break more easily. It is called a silent disease because it progresses without symptoms until a fracture happens.^[2] The International Osteoporosis Foundation (IOF) puts the global figure at around 1 in 3 women and 1 in 5 men over 50 who will have an osteoporosis related fracture.^[3]

The National Osteoporosis Foundation of South Africa (NOFSA) adds a point about osteoporosis in men that matters here. Men have larger skeletons, and their bone loss starts later and runs more slowly, so risk climbs mainly from about 70.^[2] NOFSA's guide for men says to speak to a doctor about testing from age 70, or from 50 to 69 when risk factors are present, such as a fracture from a fall at standing height, steroid treatment or low testosterone.^[6]

The same guide has a line for employers: spinal fractures can affect working men aged 50 to 65 and result in lost work days.^[6]

Be straight with your team about that. Most of your crew are not in the age group where fractures from thin bone are common. The reason to talk about it now is that the habits that protect bone are built over decades, and some workers already carry risk factors. NOFSA's guide also suggests a simple check: measure your height and compare it with the height on your passport, because losing more than 4 cm may point to spinal compression fractures.^[6]

Build, protect, strengthen

The 2026 World Osteoporosis Day theme is "Build, Protect and Strengthen Your Bones for Life". The IOF's message is that every stage of life matters, from building bone in youth to protecting against fractures later.^[1] It names physical activity as a key way to maintain good bone health.^[10]

NOFSA's guide lists these among the risk factors worth knowing:^[6]

• Smoking, and excessive alcohol use.
• Low calcium in the diet, and vitamin D deficiency.
• Lack of physical exercise, and a low body mass index.
• A family history of osteoporosis, or a broken bone at 50 or older.
• Long term use (more than three months) of glucocorticoid medicines such as prednisolone, and low testosterone.

Having one risk factor does not mean a person has osteoporosis. The IOF says the more risk factors someone has, and the higher the level of each, the greater the risk.^[7]

NOFSA also says the best exercise for bone is weight bearing exercise that works against gravity, with resistance exercise as a bonus.^[5] Whether a physical job counts as that kind of exercise is a question for a doctor. We will not promise that it does.

Why this belongs in a construction health plan

Work at height is where a fall costs the most. Regulation 10 of the Construction Regulations, 2014 requires a fall protection plan, and that plan must include the processes for evaluating employees' medical fitness to work at a fall risk position, with records.^[8] A medical fitness evaluation looks at the whole person for the job. It is not a bone scan, and we do not present it as one.

What a medical can do is open the conversation. Every Care Net medical includes a review by an occupational health nursing practitioner (OHNP).^[9] If a worker mentions a previous fracture, long term steroid use or heavy smoking, that practitioner can advise the worker to raise it with their own doctor. The decision about testing and treatment sits with that doctor.

The cost of silence

The IOF reports that overall mortality is about 20 per cent in the first 12 months after a hip fracture, and higher in men than in women.^[3] Those figures describe older people, not a 28 year old crew member. The lesson for an employer is about timing. By the time bone loss is visible, the chance to build and protect has mostly passed.

There is a human cost long before that. A fracture on site means a worker in pain, off the job and worried about income. It also means an incident report, a possible stoppage and a conversation with the family. A habit that helps keep bone strong costs very little by comparison.

Three things you can do this week

1. Put one line in a toolbox talk. Say that smoking, heavy drinking, little sun and long term steroid use are all linked to weaker bone, and that workers with a past fracture should tell their doctor.
2. Share the NOFSA guide for men. It includes a short self check that a worker can take to their doctor. NOFSA also runs a helpline on 0861 102 265.^[2][6]

1. Check your fitness for work process. Does your Annexure 3 process for work at height actually reach every person who will climb? If not, close that gap first.

If you would like a quote for your team's medicals, on your site or at one of our clinics, tell us the headcount and we reply with a fixed price.

What this article does not do

It does not diagnose, and it does not say that heavy site work protects or harms bone. It gives you the risk factors named by the International Osteoporosis Foundation and NOFSA, and sends the clinical questions to the people qualified to answer them.

Questions people ask

This article is general information for employers and is not legal or medical advice. Read the regulations for the full requirements and speak to a qualified practitioner about individual health concerns.