how much of what we believe about DEXA actually comes from sarcopenia threads
Question in the title, detail here: how much of what we believe about DEXA actually comes from sarcopenia threads.
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.
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.
Hydration status and fasting state affect the lean mass estimate. Standardising both is the difference between a comparison and a coin toss.
If somebody has the same thing measured a different way, post it next to mine and we will see whether they agree.
best — the order this archive was captured in
Nothing here is a training or nutrition prescription. Targets and programmes are matters for somebody who knows your history and your training background.
Not convinced by that DEXA comparison. Different machine, different protocol, and the difference is inside the error.
Resistance training, and at what frequency?
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.
[deleted]
Same DEXA machine both times?
How many weeks between the two scans?
Left up. Same machine, stated conditions, honest about the error margin.
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.
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.
Protein was the whole problem. Appetite dropped and I was eating well under target without noticing for a month.
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
This is the whole intervention. Protein and resistance training.
Started weighing protein rather than estimating it. The gap between what I thought and what I ate was embarrassing.
lean mass loss during weight loss is expected, the question is how much
Same. Volume over novelty. Changing programme every six weeks cost me a year.
That protein figure is grams per day, not grams per kilogram. Different claim entirely.
Have the lifts held, dropped, or moved around?
nothing on this board is a training or nutrition prescription
losing weight slower does not automatically preserve more lean mass
Correction: those scans are from different machines, and the difference you are describing is within the measurement error.
Three scans over eighteen months, same machine, same conditions. Only the third one made the first two interpretable.
do not compare your composition to a trial average
- 1lean mass loss during weight loss is expected, the question is how much9 comments in this branch · started by u/adaeze_cabrera
- 2Not convinced by that DEXA comparison. Different machine, different…6 comments in this branch · started by u/zaid_roos