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

[Discussion] sarcopenia is doing more work than we give it credit for

Discussion

sarcopenia is doing more work than we give it credit for, which sounds obvious until you try to state the evidence for it.

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

What the evidence actually supports, stripped of the arguing.

Some lean mass is lost in any weight-loss deficit. Resistance training and adequate protein intake are the two interventions with real support for limiting the proportion. Nearly everything else discussed on this board is a rounding error on those two.

The complication specific to this site is that appetite reduction makes protein intake a logistics problem: you are being asked to eat a fixed amount of something at exactly the point when eating anything is less appealing. That is why the practical threads here are about timing and food choice rather than motivation, and why measuring intake rather than estimating it is the single most common useful correction.

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

Would rather be corrected in public than confident in private.

247 up / 82 down75% upvoted19 commentsid zxe1l19 Jun 2026

19 comments

14 in this archive, depth 4

best — the order this archive was captured in

u/alcohol_aversion19 points·1 months ago

Reduced appetite makes hitting a protein target a logistics problem rather than a motivation problem, which is why the practical advice here is about timing and food choice rather than willpower.

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u/zeynep_villalobos6 points·1 months ago

This. Same machine, same protocol, or the DEXA comparison is measuring the scanner.

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u/dexa_twice_yearlyMOD13 points·1 months ago

Reminder that nobody here is prescribing training and the sidebar says so.

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u/sanne_novak-8 points·1 months ago

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

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u/prior_auth_painOPappeals1 point·1 months ago

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

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u/intent_to_treat8 points·1 months ago

Fat-free mass index is a ratio of fat-free mass to height squared. It moves when either term does, which makes it awkward to interpret during active weight change.

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u/incretin_ivypharmacology7 points·1 months ago

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

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[removed]5 points·1 months ago

[removed by moderator]

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u/edit_for_clarity1 point·1 months ago

Same DEXA machine both times?

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u/erez_yilmaz2 points·1 months ago

the scale cannot distinguish tissue types and never could

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u/sunday_shot_sal1 point·1 months ago

Not convinced by that DEXA comparison. Different machine, different protocol, and the difference is inside the error.

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u/sunday_shot_sal4 points·1 months ago·edited

Agreed — protein and resistance training.

incretin_ivy is right that protein becomes a logistics problem when appetite drops.

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u/greta_perrin6 points·1 months ago

resistance training first, cardio if there is time left

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u/arne_amankwah3 points·1 months ago

lean mass loss during weight loss is expected, the question is how much

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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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