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DEXA Scan β Full Body Composition
Structural Layer Β· 4 components scored
Medical facility or radiology clinic
What you're testing
DEXA (Dual Energy X-ray Absorptiometry) reveals what your body is made of β beyond what any performance test can show. It measures body fat %, visceral fat, lean mass, and bone density simultaneously. Combined with performance and blood testing, this creates the most complete longevity picture available.
How to book and prepare
- Search "DEXA scan [your city]" β available at radiology clinics, sports medicine facilities, and some gyms.
- Cost: typically $50β$150 AUD / $40β$100 USD. Not usually covered by standard health insurance.
- Fasting: Not required, but avoid a large meal 2 hours before.
- Hydration: Be normally hydrated β not over or under.
- The scan takes 10β20 minutes. You lie still on a table while a low-radiation arm passes over your body.
- Request a full-body report showing: body fat %, visceral fat (kg or category), lean mass (kg), and T-score.
Component 1 β Body Fat % (40% of DEXA score)
Primary structural metric. We use strict performance-optimised targets β not population averages. The difference between "normal" and optimal is significant.
| Score | Males β Body Fat % | Females β Body Fat % |
| 4 Β· Perform | 8β12% | 18β24% |
| 3 Β· Build | 12β16% | 24β30% |
| 2 Β· Base | 16β22% | 30β36% |
| 1 Β· Rebuild | > 22% | > 36% |
Component 2 β Visceral Fat (30% of DEXA score)
Peter Attia's #1 body composition priority. Visceral fat (fat surrounding organs) is metabolically dangerous β far more so than subcutaneous fat. This is the most important single measurement in body composition.
| Score | If numeric (kg) | If category shown |
| 4 Β· Elite | < 1.0 kg | Very Low |
| 3 Β· Good | 1.0β1.99 kg | Low |
| 2 Β· Caution | 2.0β2.99 kg | Moderate |
| 1 Β· High Risk | β₯ 3.0 kg | High |
β οΈ
Override rule: If visceral fat = HIGH (score 1/4), your total Life Athlete Score is capped at β€70 regardless of all other results. This is intentional β visceral fat is a systemic health emergency that overrides performance.
Component 3 β Lean Mass Index / LMI (20% of DEXA score)
Muscle mass relative to height β the most honest measure of muscularity. LMI = lean mass (kg) Γ· heightΒ² (mΒ²). Muscle is your metabolic engine, insulin sink, and ageing insurance.
| Score | Males β LMI | Females β LMI |
| 4 Β· Perform | β₯ 22 | β₯ 18 |
| 3 Β· Build | 20β21.9 | 16β17.9 |
| 2 Β· Base | 18β19.9 | 14β15.9 |
| 1 Β· Rebuild | < 18 | < 14 |
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Skinny Fat detection: If body fat % is acceptable but LMI is low (scores 1β2), the system flags a "hidden risk profile." This is a high-risk body composition pattern for long-term metabolic and functional decline.
Component 4 β Bone Mineral Density / T-Score (10% of DEXA score)
T-score compares your bone density to a young healthy adult reference. Bone density is rarely measured by trainers β yet it's one of the most important longevity indicators. We are building a skeleton that lasts 90+ years.
| Score | T-Score | Clinical Classification |
| 4 Β· Perform | > 0 | Above average density |
| 3 Β· Build | 0 to -1.0 | Normal range |
| 2 Β· Base | -1.0 to -2.0 | Osteopenia |
| 1 Β· Rebuild | < -2.0 | Osteoporosis |
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DEXA score formula: Each component scored 1β4 β weighted (BF% 40%, VF 30%, LMI 20%, BMD 10%) β normalised β scaled to /25.