[Data] BIA vs DEXA on the same day, 6% apart, pick a method and stay with it
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 best evidence for limiting the proportion.
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.
Please do not ask me what dose you should be on. I genuinely do not know and neither does anyone else here.
best — the order this archive was captured in
Strength retention is an imperfect but free longitudinal proxy: it is affected by neural factors and by being in a deficit, so it tracks tissue change loosely rather than exactly.
Disagree — slower loss does not automatically preserve lean mass. Protein and training do the work, not the rate on its own.
Push back: strength dropping in a deficit is not the same as lean mass loss. Related, not identical.
Small fix — that is fat-free mass, not muscle mass. The scan cannot separate them the way the post assumes.
Tracked grip strength and three lifts monthly. Cheaper than scanning and directionally the same answer.
Correcting myself upthread: 4 months between scans, not the figure I gave.
Hydration status and fasting state affect the lean mass estimate. Standardising both is the difference between a comparison and a coin toss.
Same. Volume over novelty. Changing programme every six weeks cost me a year.
Resistance training, and at what frequency?
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Fasted and hydrated the same way for both scans?
Have the lifts held, dropped, or moved around?
Yes. Lean mass change during weight loss is expected; the useful question is the proportion, not whether it happens.
Are you comparing against your own baseline or against a published average?
How many weeks between the two scans?
Three scans over eighteen months, same machine, same conditions. Only the third one made the first two interpretable.
protein intake gets harder exactly when appetite drops
- 1Disagree — slower loss does not automatically preserve lean mass. Protein…6 comments in this branch · started by u/sanne_novak
- 2Same. Volume over novelty. Changing programme every six weeks cost me a year.6 comments in this branch · started by u/priya_weiss