How Often Should You Get a DEXA Scan?

Body Composition: What Most Clients Do

Many of our clients scan every month. Fat and lean mass move slowly enough that any single scan is a snapshot — it is the series that tells you whether a training block or a nutrition change is actually doing what you think it is. That is why we offer monthly and quarterly options alongside one-time body composition scans.

Others scan at the start and end of a specific phase — a cut, a bulk, a return from injury — and compare the two. Both approaches work. What matters is that you are comparing scans taken on the same machine under the same protocol, so the difference you see is a real difference and not equipment drift.

What we would not tell you is that there is one correct number of weeks. Your goals, your training and your budget decide that. If you are not sure, start with a baseline and decide after you have seen what the report contains.

Bone Density: Follow Your Physician

Bone changes far more slowly than body composition, and follow-up timing is a clinical decision rather than a preference. Your physician sets it based on your initial T-score, your risk factors, and whether you have started treatment.

Our part is to give them something to decide from: an axial scan of the hips and spine with a T-score, a Z-score and an interpretation from an independent board-certified radiologist. You do not need a referral to get that first scan, and the report is written to hand straight to your doctor.

Why a Baseline Scan Matters

You can't measure change without a starting point. A baseline scan — your first DEXA scan — establishes your personal numbers. Every scan after that is compared against it.

Without a baseline, you're flying blind. You might feel like you're making progress, but you have no data to confirm it. You might have bone loss happening right now and not know it.

Get your baseline. Then you have something to measure against.

Consistency Makes Your Data Reliable

DEXA is highly accurate, but small variables can affect results. To get the most reliable comparisons between scans, keep these things consistent:

• Same machine. Different DEXA machines can produce slightly different readings. Stick with the same scanner for all your scans.
• Same time of day. No fasting is required and you can eat and drink normally, but booking a similar time each visit removes one more variable from the comparison.
• Normal hydration. Drink as you usually would. Don't chug water right before the scan or deliberately dehydrate — DEXA is far more resistant to this than bioimpedance, but consistency still helps.
• Same clothing. Wear light, metal-free workout clothes each time.

What to Expect Between Scans

Body composition moves at a pace worth knowing before you read your second report. Fat loss of a pound or two a month is a sustainable rate for most people, and muscle accrues more slowly still — measured in fractions of a pound a month once you are past the beginner window.

That pace is the whole argument for measuring rather than guessing. Changes this size are invisible on a bathroom scale and invisible in the mirror, but they are well inside what DEXA resolves.

Bone moves slower again. Holding steady rather than losing ground is a real result, particularly if you have osteopenia — and it is the kind of result only a comparison scan can show you.

The point isn't to chase dramatic numbers. It's to have real data so you can make real decisions about your training, nutrition, or treatment plan.

This article is for general information and is not medical advice. DEXA results should be interpreted alongside your own clinical history. Talk to your physician about decisions relating to your health.

Back to Blog