What to Do After Your DEXA Scan: A Practical Guide to Understanding Your Results and Taking Action

A friend of mine got her first DEXA scan at 47. The radiologist handed her a printout with two numbers — a T-score and a Z-score — and told her to follow up with her doctor. Her doctor looked at the results, said her bone density was "a little low" and recommended calcium supplements and walking. She walked out of that appointment with no idea what her T-score actually meant, no understanding of how quickly she was losing bone density, and no training protocol built around her specific results.

This is not an unusual experience. DEXA scans generate more data than most people know what to do with, and the clinical follow-up is rarely as actionable as it should be. This article is a guide to what the numbers actually mean, what they tell you that they do not tell you, and how to build an action plan that goes beyond a calcium supplement and a recommendation to walk more.

Understanding your T-score and Z-score

Your DEXA report contains two primary scores. The T-score compares your bone mineral density to the average peak bone density of a healthy young adult of the same sex. A T-score of 0 is average for a 30-year-old. A score between -1.0 and -2.5 indicates osteopenia — below average bone density. A score below -2.5 meets the clinical definition of osteoporosis. The Z-score compares your bone density to others of your same age, sex, and body size. It tells you how you compare to your peers, rather than to an absolute peak.

The sites most commonly measured are the lumbar spine (L1 to L4) and the proximal femur, including the femoral neck. These are the sites most predictive of fracture risk and where the clinical consequences of bone loss are most serious. A hip fracture in adults over 65 carries a one-year mortality rate of approximately 20 percent, which is why femoral neck density is treated as the most clinically significant of the two measurements.

What your DEXA scan does not tell you

This is the part most people leave the clinic without understanding. A DEXA scan measures the quantity of bone mineral and the quantity of lean tissue. It does not tell you the functional quality of that tissue — what it can do, how much force it can produce, how well it maintains stability under load, or how quickly it is declining relative to your individual rate of bone resorption.

Two people with identical T-scores can have dramatically different fracture risk and functional trajectories depending on their muscle strength, balance, and movement quality. Bone responds to mechanical loading — the stress placed on it by muscular contractions and ground reaction forces. A person with a T-score of -1.5 who trains with progressive resistance loading is in a fundamentally different clinical position than a person with the same T-score who walks 30 minutes a day. The scan cannot make that distinction. Your training protocol can.

Similarly, DEXA lean mass tells you how much muscle tissue you have, but not whether that tissue is functional. Intramuscular fat infiltration — fat deposited within muscle fibers as they age — can preserve lean mass measurements while significantly reducing the force and power those muscles can generate. The clinical literature refers to this as myosteatosis, and it is one of the reasons lean mass alone is an incomplete predictor of functional outcomes.

The gap between your results and a real action plan

The standard follow-up for an osteopenic DEXA result is calcium supplementation, vitamin D, and low-impact exercise — typically walking or swimming. This is not wrong, but it is incomplete. The research is unambiguous that progressive resistance training producing high mechanical loads at the hip and spine is the most effective intervention for preserving and improving bone mineral density in perimenopausal and postmenopausal women.

The LIFTMOR trial demonstrated this directly: women with diagnosed osteopenia and osteoporosis performing twice-weekly supervised high-intensity resistance training at 80 to 85 percent of one-rep maximum achieved significant, safe gains in lumbar spine and femoral neck bone mineral density over 8 months. Their compliance was above 87 percent and there were no fractures. The intervention worked because the loading was sufficient to generate the mechanical stimulus bone requires to remodel and strengthen.

Walking does not generate loading forces sufficient to produce this adaptation. Standard physiotherapy does not either. The follow-up action plan after a DEXA scan should be built around what the evidence actually supports for bone health, not what is most familiar or most conservative.

What to actually do after your DEXA scan results

The steps are sequential, not simultaneous.

First, understand your individual trajectory. A single DEXA scan is a snapshot. It tells you where you are, not how quickly you are moving. If this is your first scan, schedule a repeat in 12 to 24 months after implementing a resistance training protocol. The comparison between the two scans tells you whether your bone density is stable, improving, or continuing to decline — and at what rate. That rate of change is the most clinically actionable number you can have.

Second, build a training protocol around your results. Not a generic bone health program. A protocol that addresses your specific T-scores at the specific skeletal sites your scan measured, with progressive loading at those sites over time. Lumbar spine density is primarily protected by loading the spine through hip hinge and squat patterns. Femoral neck density is protected by loading the hip through single-leg and hip abduction movements. A protocol that does not target the specific sites where your deficit lies is not optimized for your results.

Third, assess the functional dimensions your scan cannot measure. Your bone density tells you about structural risk. Your muscle strength, power, balance, and mobility tell you about functional risk — the risk of falling, of being unable to generate enough force to protect yourself under load, of moving in ways that compound rather than reduce skeletal stress. A complete post-DEXA action plan addresses both.

Fourth, repeat the scan and compare. Bone density changes slowly. A meaningful comparison requires at least 12 months between scans, and 18 to 24 months gives a more reliable signal. Track the absolute T-score change at each site, not just whether you remain in the osteopenia or osteoporosis range. The trend matters more than the category.

A note on medication

For T-scores below -2.5 or below -1.5 with additional fracture risk factors, your physician may recommend bisphosphonate therapy. This is a legitimate and evidence-based intervention that slows bone resorption. It is not a substitute for training. The research consistently shows that exercise and medication together produce better outcomes than either alone. If your doctor recommends medication, do not treat that as a reason to reduce the urgency of your training protocol.

Want to understand what a DEXA scan can and cannot tell you about your overall muscle health? Read What a DEXA Scan Actually Tells You About Muscle Health — And What It Misses.