Bone mineral density is the mineral-per-area in your skeleton. The T-score compares you to a healthy young adult. Unlike muscle, bone turns over slowly — every decade of consistent mechanical load matters, and the windows to build it are finite.
What matters most is the direction over time under the same conditions — is the number trending toward the Fit band, or drifting away from it? Your Radar scores every marker 0–100 on the same four-band continuum you see on your report: Fit (90+), Well (50–89), Short of well (26–49), Sick (25 and under). A score of 25 is the diagnosable line at any age. The values below are the age-40 reference — the bands shift with your age and sex, so use the calculator underneath for your own numbers.
Bone is a living tissue. It is constantly being broken down and rebuilt — but slowly. Peak bone mass is set in the late twenties; after that, maintenance requires consistent mechanical loading, adequate protein, and sufficient vitamin D, calcium, and sex hormones.
The T-score expresses your density in standard deviations away from a healthy young adult. Zero is the reference. −1.0 is low-normal. Below −2.5 is osteoporosis, where fracture risk rises sharply — often for the first time through a trivial fall.
Bone responds to load that is heavier than daily life. Walking preserves; running maintains; lifting heavy and jumping build. Unloaded cardio, while valuable for other capacities, is not sufficient to protect bone.
BMD belongs in Preserve Functionality because the skeleton carries everything else. A hip fracture in the later decades is one of the single worst life-course events, independent of the bone itself. Protect the scaffolding.
The education above is open to everyone. The specific levers — what to actually do to move this marker — are part of the coaching program. Enter your coach password to unlock, or get in touch about becoming a coach.
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