If you’ve had a DEXA scan and walked away from the appointment holding a piece of paper full of numbers (T-scores, Z-scores, percentages, comparisons to “young adults”) you are not alone. I have sat down with patients almost every week who tell me the same thing: “My doctor said I have osteopenia (or osteoporosis), but I honestly don’t know what to do about that.”
So let’s break it down in plain language.
What a DEXA Scan Measures
DEXA stands for Dual-Energy X-ray Absorptiometry. It’s a low-dose imaging scan that measures your bone mineral density (BMD). Basically, it tells you how tightly packed and strong your bones are, usually at the hip and spine, since those are the areas most likely to fracture and most predictive of overall bone health.
Your T-score compares your bone density to that of a healthy 20-30-year-old adult of the same sex. This is the number your diagnosis is actually based on. Here’s how to read it:
- +1 to -1: Normal bone density
- -1 to -2.5: Osteopenia (lower than normal bone density, a “yellow flag” stage)
- -2.5 or lower: Osteoporosis
Your Z-score compares your bone density to other people your own age and sex, rather than to a 30-year-old. This number is really useful for younger patients or for flagging bone loss that seems unusual for someone’s age. It can point toward another underlying cause (like a hormonal condition, medication side effect, or nutritional deficiency) that’s worth looking into with your doctor. For most postmenopausal women and older adults, the T-score is the one guiding the diagnosis and treatment conversation.
Why the Hip and Spine?
You’ll usually see two (sometimes three) numbers on your report, because DEXA typically scans the lumbar spine and the hip (often both the femoral neck and total hip). These sites are prioritized because
- They’re common fracture locations
- A hip fracture in particular carries the highest risk for loss of independence and death
- Bone density can vary from site to site, so looking at more than one area gives a better picture
Sometimes your spine and hip numbers won’t match. One might be in the osteopenia range while the other is normal or lower. Bone density can differ by location, which is part of why your provider looks at the whole picture, not just one score.
Osteopenia Doesn’t Mean You Are Doomed to Osteoporosis
A diagnosis of osteopenia is a call to action, not a countdown clock. Bone is living tissue, and it responds to how you load it. Weight-bearing exercise, resistance training, adequate calcium and vitamin D, and, when appropriate, medication can meaningfully slow or even improve bone density trends.
This is where physical therapy plays a real role. A skilled PT can guide you through progressive, bone-loading exercise that’s appropriately dosed for your fracture risk, because for someone with lower bone density, the type and intensity of loading matters. Too little won’t stimulate bone growth; the wrong movement pattern (especially certain spinal flexion exercises) can carry unnecessary risk. This is not a “just start lifting weights” situation without some guidance, it’s a “let’s build the right program for your bones” situation.
If you’ve recently gotten a DEXA report, here’s what I’d encourage:
- Locate your T-score first, that’s your diagnostic category.
- Bring your results to a PT evaluation. We can translate those numbers into a concrete, individualized exercise plan that builds bone strength safely.
Your DEXA report is a snapshot, not a life sentence. Understanding it is the first step toward doing something meaningful with it.
Dr. Rachel Atufunwa PT, DPT