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c/glp1muscle·posted 1 months ago by u/bence_zamora

[Discussion] the FFMI advice in here is 3 years out of date

Discussion Cold Box ×9

the FFMI advice in here is 3 years out of date. It is the sort of thing everyone half-believes and nobody writes down.

The relevant figures are 3 years, and they come from the same log I have kept the whole time.

Protein was the whole problem. Appetite dropped and I was eating well under target without noticing for a month.

Kept the same programme for a year instead of changing it every six weeks. That was the change that worked.

That is everything I have. The rest is opinion and I have tried to keep it out.

656 up / 116 down85% upvoted23 commentsid znefw21 Jun 2026

23 comments

23 in this archive, depth 4

best — the order this archive was captured in

u/greta_lokken-2 points·1 months ago

DEXA has a meaningful coefficient of variation, and it differs between machines and protocols. Comparing scans from different clinics adds a systematic offset that is invisible on the report.

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u/dexa_twice_yearlyMOD1 point·1 months ago·edited

Left up. Same machine, stated conditions, honest about the error margin.

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u/marisol_kravchenko1 point·1 months ago

DEXA has a real error margin and people quote it to one decimal

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u/greta_perrin1 point·1 months ago

Cosigning that protein gets harder precisely when appetite drops. That is the actual difficulty and it is logistical.

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u/bence_zamora65 points·1 months ago

FFMI is a ratio and it moves when either term moves

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u/lina_bruun45 points·1 months ago

Lost slower for six months deliberately and my composition change was not obviously different. Training was what mattered.

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u/rania_salinas24 points·1 months ago

Three scans over eighteen months, same machine, same conditions. Only the third one made the first two interpretable.

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u/line_demir16 points·1 months ago·edited

Small fix — that is fat-free mass, not muscle mass. The scan cannot separate them the way the post assumes.

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[deleted]8 points·1 months ago

[deleted]

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u/usp_appendixcompendial10 points·1 months ago·edited

Small fix — that is fat-free mass, not muscle mass.

Agreed — and same machine, same conditions, or the two scans are not comparable.

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u/cold_chromatogram_only9 points·1 months ago

That protein figure is grams per day, not grams per kilogram. Different claim entirely.

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u/rasmus_petrescu19 points·1 months ago·edited

Disagree — slower loss does not automatically preserve lean mass. Protein and training do the work, not the rate on its own.

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u/vito_chowdhury12 points·1 months ago

What was the rate of weight change over that window?

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u/stubborn_batchlist_pls6 points·1 months ago

a single DEXA is a number, two is a comparison, three is a trend

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u/zeynep_villalobos4 points·1 months ago

Are you comparing against your own baseline or against a published average?

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u/bilal_adebayo3 points·1 months ago

I would not change the programme on the strength of one scan. The measurement error is larger than the effect you are reacting to.

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u/bence_zamoraOP5 points·1 months ago

Same DEXA machine both times?

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u/erez_yilmaz11 points·1 months ago

Compared two scans from different clinics and panicked over a difference that was inside the error margin.

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u/priya_weiss0 points·1 months ago

Have the lifts held, dropped, or moved around?

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u/protein_first_pnutrition0 points·1 months ago

Have the lifts held, dropped, or moved around?

Adding the free proxy — track a few lifts monthly. It costs nothing and it is longitudinal.

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u/incretin_ivypharmacology1 point·1 months ago·edited

Correction: those scans are from different machines, and the difference you are describing is within the measurement error.

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u/usp_appendixcompendial1 point·1 months ago

the same DEXA machine or it is not a comparison

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u/prior_auth_painappeals12 points·1 months ago

Yes. Nobody here is prescribing training or nutrition and the good posts say so.

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Lean-mass retention during rapid weight loss: protein targets, resistance-training minimums, DEXA and BIA measurement reality, FFMI tracking, and the sarcopenia question that nobody funded a proper trial for.

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