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c/glp1muscle·submitted 12 days ago by u/step_count_stan

[Data] BIA vs DEXA on the same day, 6% apart, pick a method and stay with it

Databranch of 6 comments

Thinking out loud about this: BIA vs DEXA on the same day, 6% apart, pick a method and stay with it. Hard numbers: 6%. Anything softer than that is flagged as an impression. Some lean mass loss accompanies weight loss in any deficit. Resistance training and adequate protein intake are the two interventions with the…

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6 comments, started 12 days ago
u/sanne_novak30 points·12 days 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/long_post_larry24 points·12 days ago

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

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u/greta_lokken19 points·12 days 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/throwaway_wl20268 points·11 days ago

Tracked grip strength and three lifts monthly. Cheaper than scanning and directionally the same answer.

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u/greta_lokken6 points·11 days ago

Correcting myself upthread: 4 months between scans, not the figure I gave.

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u/emil_okwuosa3 points·11 days ago

Hydration status and fasting state affect the lean mass estimate. Standardising both is the difference between a comparison and a coin toss.

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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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