First check whether the input, method, conditions or rounding changed. A one-day difference in an estimate does not by itself establish a body-composition change.
Interpreting a change
Why an estimate can change before your body meaningfully does
A changed body-fat number can come from a changed input or method. Check what changed before interpreting the number as a change in your body.
| What stayed the same | What changed | What to check |
|---|---|---|
| Person and day | Photo angle and lighting | Retake under the original camera setup. |
| Person and period | Photo estimate versus tape formula | Compare each method with its own prior results. |
| Recorded estimate range | Displayed rounded point value | Read the range and method context before treating it as change. |
Method note: these are explanatory examples and blank worksheets. They do not diagnose health, calculate tissue composition, or send entered information to LeanLens. Review the photo privacy guide before starting a scan.
Compare the conditions first
The examples below are illustrative, not LeanLens results. They show how to identify the source of a difference before drawing a conclusion.
- Same body, different photo: a higher camera angle or stronger side light changes visible contours. Retake the photo under your usual setup before comparing estimates.
- Same person, different method: a tape formula uses entered circumferences; a photo estimate uses visible cues. A difference between them is not itself evidence that either result is wrong.
- Same saved image, different reported precision: compare the underlying range and method version when available. A rounded point value can appear to move even if its useful interpretation has not.
A four-step retest
Repeat the measurement only if it will help your decision. Keep your method, landmark or photo setup, units, and recording conditions consistent.
- Write down the method, date and reported range or value.
- For a photo, match pose, clothing, lens, distance and light. For tape, match the landmark, posture and tension.
- Repeat after checking inputs. Keep the original result rather than overwriting it.
- Look at the repeated trend alongside waist readings, training notes and photos. Treat a single small difference as unresolved.
FAQ
Common questions
No. They depend on different inputs and assumptions. Keep each method in its own trend and compare its repeated results under consistent conditions.