DEXA measures bone density, lean mass distribution, and visceral fat - the stuff that changes how you age.
DEXA is low radiation test compared to CT/MRI, takes 7 minutes, and is cheap enough to repeat regularly. That repeatability is the point.
Some numbers from my tests over years 32 → 37:
Muscle mass: 1.7% 👍🏼 (people lose 3-8% per decade after 30)
Bone density: 2.6% 👍🏼 (most people are slowly declining by this age)
Body fat: 0.8 pts 👍🏼
Visceral fat: 58% 👎🏼
Bone density is the one nobody thinks about until it's a problem. There are no symptoms in your 30s. Heavy compound movements (squats, deadlifts, loaded carries) are the strongest stimulus for maintaining and building bone. Resistance training also remains the most reliable intervention for age-related muscle loss.
We're adding DEXA to Ultrahuman Performance Centre. The ring captures daily data sleep, HRV, recovery.
DEXA captures the slow structural shifts that compound over years.
If you're over 30, get a baseline. Repeat it. That delta is the number that matters.