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c/glp1muscle·posted 3 months ago by u/milos_vestergaard

does DEXA actually matter or is it forum lore at this point

Question

Asking properly rather than in a comment on somebody else’s thread: does DEXA actually matter or is it forum lore at this point.

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

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

Started weighing protein rather than estimating it. The gap between what I thought and what I ate was embarrassing.

If somebody has the same thing measured a different way, post it next to mine and we will see whether they agree.

53 up / 2 down96% upvoted12 commentsid 18x2z914 Apr 2026

12 comments

12 in this archive, depth 4

best — the order this archive was captured in

u/diego_iyer7 points·3 months ago

Nothing here is a training or nutrition prescription. Targets and programmes are matters for somebody who knows your history and your training background.

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u/mariam_cabrera6 points·3 months ago

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

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u/viktor_girard5 points·3 months ago

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/aksel_kjaer2 points·3 months ago·edited

Yes. Lean mass change during weight loss is expected; the useful question is the proportion, not whether it happens.

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u/protein_first_pnutrition2 points·3 months ago

Agreed — protein and resistance training. Everything else in these threads is a rounding error on those two.

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u/intent_to_treat6 points·3 months ago

How to make a DEXA comparison mean anything.

Same machine, same clinic, same protocol. Same hydration and fasting state, as far as you can manage. At least three to four months apart, because the measurement error is large relative to short-term change. Three scans rather than two, because the first pair cannot distinguish a trend from noise.

Do less than that and you have two numbers with an offset of unknown size, which people then react to by rebuilding a training programme. The free alternative — a few tracked lifts and a monthly waist measurement — is directionally informative, costs nothing, and is far harder to over-interpret.

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u/milos_vestergaardOP4 points·3 months ago

resistance training first, cardio if there is time left

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u/milos_vestergaardOP2 points·3 months ago

strength retention is a decent proxy and it is free

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u/sunday_shot_sal1 point·3 months ago

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

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u/lina_bruun1 point·3 months ago

protein and resistance training, that is the entire intervention

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u/skip_week_sceptic4 points·3 months ago·edited

Push back: strength dropping in a deficit is not the same as lean mass loss. Related, not identical.

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u/diego_iyer3 points·3 months ago

Push back: strength dropping in a deficit is not the same as lean mass loss.

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

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About c/glp1muscle

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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