DEXA Scan Results Explained — What Your T-Score Actually Means

Quick Answer: Your DEXA scan results are reported as T-scores. A T-score above -1.0 is normal, between -1.0 and -2.5 indicates osteopenia (low bone density), and -2.5 or below indicates osteoporosis. But the number alone doesn’t tell the whole story — your fracture risk depends on T-score, age, fall risk, and other factors. Physical therapy can improve bone density through targeted loading programs.

If your DEXA report says osteopenia or osteoporosis, the important question is not just what your T-score means. It is what you should do next. This guide explains how to read the numbers, how fracture risk is different from bone density, and how Dr. Emily Warren translates DEXA results into safe strength, balance, and bone-loading plans.

What Is a DEXA Scan?

DEXA stands for Dual-Energy X-ray Absorptiometry. It’s the gold standard test for measuring bone mineral density (BMD). The scan uses two low-energy X-ray beams to measure the density of your bones, typically at the lumbar spine, femoral neck (hip), and sometimes the forearm.

The test takes about 10-15 minutes, involves minimal radiation (less than a chest X-ray), and is painless. If you’re a postmenopausal woman or a man over 70, or if you have risk factors for osteoporosis, your doctor has likely recommended one.

Understanding Your T-Score

Your DEXA results are reported primarily as two numbers: the T-score and the Z-score. The T-score is the one that matters most for diagnosis.

What the T-Score Measures

Your T-score compares your bone density to the average peak bone density of a healthy 30-year-old of your sex. It’s measured in standard deviations:

What About the Z-Score?

Your Z-score compares your bone density to others of your same age, sex, and ethnicity. It’s most useful for premenopausal women and men under 50. A Z-score below -2.0 suggests bone density is lower than expected for your age and warrants investigation for secondary causes (thyroid issues, vitamin D deficiency, medication effects, etc.).

Reading Your DEXA Report: A Real-World Example

A typical DEXA report might show:

• Lumbar Spine (L1-L4): T-score -1.8
• Left Femoral Neck: T-score -2.2
• Left Total Hip: T-score -1.5

Your diagnosis is based on the lowest T-score at any measured site. In this example, the femoral neck score of -2.2 means the diagnosis is osteopenia — approaching osteoporosis but not quite there.

Why Different Sites Show Different Numbers

It’s completely normal to have different T-scores at different sites. Your spine and hip experience different mechanical loads throughout your life, and bone density varies accordingly. This is actually useful information for treatment planning — it tells me which areas need the most attention.

For instance, if your spine T-score is significantly worse than your hip, targeted spinal loading exercises become especially important. If your hip is the primary concern, we focus on impact loading and hip-specific strengthening.

What Your T-Score Doesn’t Tell You

Here’s something many patients don’t realize: your T-score is not your fracture risk. It’s one factor in your fracture risk.

The FRAX Score

Your doctor may also calculate your FRAX score (Fracture Risk Assessment Tool), developed by the University of Sheffield. FRAX estimates your 10-year probability of a major osteoporotic fracture based on:

• Age
• Sex
• BMI
• Prior fractures
• Family history of hip fracture
• Current smoking
• Glucocorticoid use
• Rheumatoid arthritis
• Secondary osteoporosis
• Alcohol use (3+ units daily)
• Femoral neck BMD

Two people with identical T-scores can have very different fracture risks. A 55-year-old woman with a T-score of -2.0 and no other risk factors has a much lower fracture risk than a 75-year-old woman with the same T-score who has already had a wrist fracture and takes prednisone.

Fall Risk Matters More Than Most People Realize

Here’s what often gets overlooked: most fractures happen because of falls. Your bone density determines whether a fall results in a fracture, but your fall risk determines whether you fall in the first place.

This is where physical therapy makes an enormous difference. I can’t change your T-score overnight, but I may reduce your fall risk within weeks through balance training and fall prevention programs.

A study by Sherrington et al. (British Journal of Sports Medicine, 2017) found that exercise programs that include balance training reduce fall rates by approximately 23%. When you combine that with the fracture-prevention benefits of stronger bones from progressive loading, the risk reduction is substantial.

How Physical Therapy Improves Your DEXA Results

This is what I spend most of my time talking to patients about: you can actually improve your bone density through the right exercise program.

The Evidence for Exercise and Bone Density

The LIFTMOR trial (Watson et al., Journal of Bone and Mineral Research, 2018) demonstrated that high-intensity resistance and impact training improved bone density at the lumbar spine and femoral neck in postmenopausal women with low bone mass. The program included:

• Heavy deadlifts
• Squats
• Overhead press
• Impact loading (jumping chin-ups with drop landings)

Participants trained twice per week for 8 months, and the results were significant — not just halting bone loss, but actually building new bone.

I incorporate these principles into my bone health programs, adapting intensity to each patient’s starting level. You can read more about this on my best exercises for bone density page and my osteoporosis physical therapy page.

What “Weight-Bearing Exercise” Actually Means

When your doctor says “do weight-bearing exercise,” they’re being vague because the specifics matter:

• Walking is weight-bearing but provides minimal bone-building stimulus (not enough load)
• Swimming is great exercise but not weight-bearing at all
• Light resistance bands are weight-bearing but too low-intensity for bone adaptation
• Heavy deadlifts, squats, and impact exercises provide the stimulus your bones actually need

The minimum effective dose for bone adaptation requires significant mechanical overload — your bones need to experience forces greater than what they encounter in daily life. This is why gentle exercise programs, while beneficial for other reasons, rarely improve DEXA scores.

A Patient Story: Improving T-Scores Without Medication

I worked with a 62-year-old woman from Murray whose DEXA showed a lumbar T-score of -2.6 and femoral neck T-score of -2.1. Her doctor recommended bisphosphonate medication, but she wanted to try exercise first (with her doctor’s agreement to reassess in one year).

We started with a thorough evaluation of her movement patterns, strength, and balance. Over 8 visits across 4 months, I taught her a progressive loading program based on LIFTMOR principles. She continued the program independently, checking in with me monthly.

At her repeat DEXA 14 months later:

• Lumbar spine: -2.6 → -2.3 (improvement)
• Femoral neck: -2.1 → -1.9 (improvement)

Her doctor was impressed enough to continue the exercise approach rather than starting medication. That was two years ago, and her most recent DEXA shows continued stability.

This isn’t everyone’s experience — some patients need medication alongside exercise, and that’s appropriate. But for many people with moderate osteoporosis, a well-designed exercise program can meaningfully improve bone density. Read more about osteoporosis treatment without medication.

When to Repeat Your DEXA Scan

DEXA scans are typically repeated every 1-2 years to track changes. The International Society for Clinical Densitometry recommends:

• Every 2 years for most people being monitored
• Every 1 year if you’ve started new treatment (medication or significant exercise program) and want to assess response
• Consistency matters — try to use the same DEXA machine each time, as there can be variability between machines

Understanding Changes Between Scans

Bone density changes slowly. A meaningful change on DEXA is generally considered to be a 3-5% difference (depending on the site and machine precision). Small fluctuations between scans may be within the measurement error rather than true changes.

This is why I tell patients: don’t obsess over tiny T-score changes. Focus on the trend over time and on the modifiable factors you can control — exercise intensity, nutrition, fall risk, and overall health.

What to Do After Getting Your Results

Here’s my recommended action plan based on your DEXA results:

T-Score -1.0 to -1.5 (Mild Osteopenia)

• Start a progressive weight-bearing exercise program
• Ensure adequate calcium (1,200 mg/day) and vitamin D (1,000-2,000 IU/day)
• Address fall risk factors
• Repeat DEXA in 2 years

T-Score -1.5 to -2.5 (Moderate Osteopenia to Osteoporosis Threshold)

• Work with a physical therapist on a structured bone-loading program
• Discuss medication options with your doctor (may or may not be needed)
• Prioritize balance training
• Know which exercises to avoid and which to prioritize
• Repeat DEXA in 1-2 years

T-Score -2.5 or Below (Osteoporosis)

• See a physical therapist for supervised progressive loading
• Discuss medication with your doctor — exercise and medication work synergistically
• Begin a comprehensive fall prevention program
• Modify high-risk activities (learn what to avoid)
• Repeat DEXA in 1 year to assess treatment response

Frequently Asked Questions

What is a normal T-score for my age?

The T-score compares you to a healthy 30-year-old, so it’s normal for T-scores to decline with age. However, the diagnostic thresholds (-1.0 for osteopenia, -2.5 for osteoporosis) apply regardless of age. Your Z-score tells you how you compare to others your age.

Can I improve my T-score with exercise alone?

Yes, though results vary. The LIFTMOR trial showed significant improvements with high-intensity resistance and impact training. Some patients see measurable improvement, and many are trying to slow bone loss or improve strength and fall risk. The key is appropriate exercise intensity — gentle exercise alone usually does not provide enough bone-building stimulus.

How accurate are DEXA scans?

DEXA is the gold standard for bone density measurement, but it has a precision error of about 1-2%. This means small changes between scans may be measurement variability. Using the same machine for repeat scans improves reliability.

Does my T-score mean I’ll definitely break a bone?

No. T-score is one factor in fracture risk. Many people with osteoporosis never fracture, especially if they maintain good balance, muscle strength, and fall prevention strategies. Conversely, people with normal bone density can fracture in significant trauma.

Should I take calcium and vitamin D supplements?

Most guidelines recommend 1,200 mg of calcium daily (from food + supplements) and 1,000-2,000 IU of vitamin D for postmenopausal women. Your doctor should check your vitamin D level. But supplements alone don’t build bone — they provide the raw materials. You need mechanical loading (exercise) to stimulate bone formation.

My T-score is -1.2. Should I be worried?

Mild osteopenia (-1.0 to -1.5) is very common and not cause for alarm. It is, however, a signal to start proactive bone-building exercise now, before bone loss progresses. Think of it as an early warning that gives you time to act.

Take Control of Your Bone Health

Your DEXA scan results are a starting point, not a verdict. Whether you’re dealing with osteopenia or osteoporosis, the right exercise program can make a real, measurable difference in your bone density and fracture risk.

I help patients in the Salt Lake City area understand their results, build safe and effective bone-loading programs, and track their progress over time.

Reviewed by Emily Warren, DPT, BoneFit certified clinician and owner of Mindful Movement PT in Holladay, UT.

Related Reading

• The LIFTMOR Protocol — High-Intensity Training That Builds Bone
• BoneFit Certified Physical Therapy in Utah
• Can You Reverse Osteoporosis with Exercise?