Can you still build bone mass after fifty?

Building bone mass after fifty is harder than at a younger age, but slowing bone loss is very much achievable, and that matters just as much. Strength training is the most powerful tool you have at your own disposal for this purpose. Nearly two dozen studies show a positive relationship between resistance training and bone density in older adults. The more intense the training, the greater the effect, although it works in a location-specific way: you train the bone in the muscles you load. A randomised study in obese older women (average age 80) showed that strength training twice a week for six months completely prevented bone loss, while the control group did lose bone mass.

Age-related muscle loss plays a major role. Between the ages of thirty and eighty, you lose on average roughly 15% of your lean muscle mass, and less muscle also means less protection for your bones. Strength training therefore addresses two problems at once.

Calcium is useful but limited. Eating more calcium or taking it as a supplement produces a small increase in bone density in people over 50 (roughly 0.6 to 1.8%), but that gain stalls after the first year and is probably not large enough to meaningfully prevent fractures. Calcium alone is therefore not a solution.

When bone density has already declined significantly, medications are considerably more effective. Alendronate, a widely used bone medication, halved the risk of vertebral, hip, and wrist fractures in postmenopausal women in a large study. Denosumab is an injectable alternative that inhibits bone breakdown and is approved for women with an elevated fracture risk. Guidelines recommend a bone density measurement via a DEXA scan for everyone over 50, so you know where you stand and whether medication makes sense. If this runs in your family or you suspect you are at risk, discuss it with your general practitioner or specialist.

One final point about weight: gaining weight rapidly and substantially in adulthood is associated with more than twice the risk of osteoporosis of the spine. This is an association, not a proven cause, but it does indicate that a stable, healthy weight is part of a bone-healthy lifestyle.