01
Glossary
AI Body Scan.
A photo-based coaching signal that reads three weekly client photos for physique-relevant change — definition, body composition signal, symmetry, posture. A coaching layer, not a clinic.
Photo Journal compare
Drag to compare where the body started vs where it moved
Why it matters
When the scale stalls, the look-back still shows the client what moved. That is the part they remember.
Before
Jan
After
Apr
02
Definition
What AI Body Scan means.
AI Body Scan is a category of coaching surface that converts a client's weekly physique photos — typically front, side, back — into a structured read of visual change a coach can act on. The surface returns coaching-relevant signal: per-region muscle definition, directional body composition change, left-right symmetry, posture observations, and circumference estimates. It is built to give a coach more to look at, not to issue a diagnosis or replace clinical body-composition testing. Progress photos tell a coach something changed; AI Body Scan helps tell them what.
03
The job
A structured read on the body, not a single number.
The job of an AI Body Scan is to compress what a coach's eye would otherwise extract from a side-by-side photo comparison and surface it as structured signal the coach can act on this week. The output is not a single body-fat number to chase. It is a set of regional reads, tracked over time, comparable week-on-week.
- Per-region muscle definition signal across the major groups.
- Body composition signal — directional, tracked over time, not a clinical figure.
- Left-right symmetry observations.
- Posture cues from the standardised pose set.
- Circumference estimates surfaced alongside the scan.
- A visible-change view comparing the latest scan to prior captures.
04
Adjacent categories
Categories that look similar, but aren't the same thing.
AI Body Scan overlaps with adjacent categories. The distinction matters because the wrong category creates the wrong expectation.
- A DEXA scan. A clinical body-composition test using dual-energy X-ray absorptiometry. AI Body Scan is not a substitute, and the body-fat output is directional rather than clinical.
- A medical or diagnostic tool. AI Body Scan does not diagnose, does not prescribe, and does not assess clinical conditions.
- A consumer body-fat scale. Bioimpedance tools estimate body composition through current. AI Body Scan reads photos. Different inputs, different outputs, different reliability profiles.
- A generic AI photo enhancer or filter. AI Body Scan does not retouch, beautify, or generate after images. It produces structured numerical and observational signal from the photos as captured.
The categorical word matters: a coaching signal, not a clinical instrument.
05
Honest framing
What AI Body Scan can't do, and how to use it anyway.
Every photo-based body-composition tool has limits. The honest version of how a coach should use AI Body Scan is what makes it useful rather than misleading.
- The body-fat figure is directional. Useful for tracking change over time. Not a clinical figure.
- It works best when conditions stay constant — same lighting, same time of week, same pose cues.
- It is most reliable for coaching-relevant change and least reliable as an absolute clinical number.
- It should be read alongside scale weight, training output, and check-in answers — not as a standalone score.
- Clinical questions belong with a clinician, not with a coaching tool.
The point is not perfect numbers. It is a more honest signal a coach can actually coach against than the eye alone could extract from a phone roll of progress photos.
06
TrainedBy and the term
TrainedBy's AI Body Scan.
Inside TrainedBy, AI Body Scan is a named surface in the client app. The client takes three photos — front, side, back — using standardised pose cues in the same app where they log workouts and meals. The scan returns the structured read above. Outputs surface in the Weekly Cockpit for the coach and in the client's Photo Journal for the client — same record, two views — and become part of the evidence the coach uses to write the week.
- Captured in the client app — no separate device, no studio, no clinic.
- Outputs land in the Weekly Cockpit alongside the rest of the client's signal.
- The historical record builds in the client's Photo Journal, usable later for transformation context.
For the full product surface, start with /features/ai-body-scan.
AI Body Scan is one of the coaching-signal surfaces inside a coach operating system.
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FAQ
Common questions on the term.
What is AI Body Scan?
A photo-based coaching signal that turns three weekly client photos into a structured read of physique-relevant change — per-region muscle definition, directional body composition signal, symmetry, posture, circumference estimates, and comparison to prior captures.
Is AI Body Scan a DEXA replacement?
No. AI Body Scan is a coaching signal. DEXA is a clinical instrument. The body-fat output is directional and useful for tracking change over time alongside scale weight, photos, and check-ins — not as a standalone clinical figure.
How accurate is the body-fat estimate?
Directional. It is most useful for tracking change over time and least useful as an absolute clinical figure. Read it alongside the rest of the signal, not on its own.
Can clients game the photos?
Photo-based reads degrade when conditions drift — different lighting, different time of week, different pose. The standardised pose cues exist to keep conditions constant, which makes the read week-on-week comparable. If a capture looks off, the coach can message the client to reshoot it.
Is "AI Body Scan" an industry-standard term?
Not yet. It is TrainedBy's framing for a photo-based coaching signal that converts weekly client physique photos into structured per-region reads.
Does AI Body Scan replace progress photos?
It uses them. The scan adds a structured read on top of the photos, not in place of them. The Photo Journal still holds the visual record.
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Final CTA
See how TrainedBy's AI Body Scan works in practice.
See the input, the output, the cockpit handoff, and the limits in one place.