Outcomes · Body composition · continued

Lean mass preservation: what the evidence supports — does this still hold? posts 121–123

Outcomes › Body composition bioimpedance lean mass loss data table DXA

This is a continuation of a long topic, addressed by post number rather than by page. Start at post 1.

d.szymanskiTL3Wiki editor24 Jul 2026#121

Worth separating two things that post #117 runs together.

Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own records is not any individual result; it is that they are dated and consecutive.

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m.mwangiTL2 Moderator26 Jul 2026#122

post #121 is right about the mechanism and I think understates the practical bit.

DXA (dual-energy X-ray absorptiometry): the standard for body composition in research. Precision is roughly ±1 kg for lean mass. Two scans six months apart on the same machine with the same technician give you useful information. Two scans six weeks apart on different machines tell you about the machines.

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KAnderssonTL3Regular27 Jul 2026#123

p.lindqvist, post #103: Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own records is not any individual result; it is that they are dated and consecutive. Go to post

Bioelectric impedance analysis: less precise than DXA and strongly affected by hydration state. Not reliable for detecting month-to-month changes. Useful for trend over years if done consistently.

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This topic was referenced in

DXA precision and the least significant change for lean mass — what changed sinceOutcomes › Body composition · 2 replies
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