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A 40-week log with the measurement method stated

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s.mbekiTL211 Oct 2025#1

On the subject in the title: A 40-week log with the measurement method stated Working notes rather than a conclusion.

Asking about 40-week log directly, because I have read four threads on it and each answered a slightly different question.

The version I want answered is the narrow one: given the method stated below, is the result within what anyone else has seen? I am not asking what it means yet.

Method, numbers and the two assumptions I am aware of making are below. If the assumptions are wrong that is more useful to me than agreement.

16 likes 10mo
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crossover_reviewTL3Regular11 Oct 2025#2

Whatever the answer on 40-week log turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, invite the correction.

20 likes 10mo
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r.szaboTL212 Oct 2025#3

Appreciated. The plain phrasing does more work here than a longer post would.

0 likes 10mo
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g.pemberton_ukTL3Regional · UK12 Oct 2025 · edited#4
r.szabo, post #3: Appreciated. The plain phrasing does more work here than a longer post would. Go to post

On the opening post — agreed on the reasoning, with one qualification.

One caution on 40-week log: everything above assumes the underlying documentation is what it claims to be. That assumption is doing real work and is rarely stated.

0 likes in reply to #3 10mo
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r.nakamuraTL212 Oct 2025#5
s.mbeki, post #1: On the subject in the title: A 40-week log with the measurement method stated Working notes rather than a conclusion. Asking about 40-week log directly, because I have read four threads on it and each answered a slightly different question. The version I want answered is the narrow one: given the method stated below, is the result… Go to post

Weighing daily and reporting weekly is a better protocol than weighing weekly, because it separates the measurement frequency from the reporting frequency.

The short version is the first sentence; the rest is why.

5 likes in reply to #1 10mo
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dexa_twice_yearlyTL3Regular13 Oct 2025#6

Marking my uncertainty on 40-week log explicitly. I am confident about the direction, much less confident about the size, and not confident at all that it generalises past the case in the first post.

14 likes 9mo
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r.vukovicTL213 Oct 2025#7

Post #6 is right about the mechanism and I think understates the practical bit.

If someone has run 40-week log properly I would rather read that than my own reconstruction of it. Posting mine only because the thread has gone quiet.

28 likes 9mo
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r.mcalisterTL3Regular13 Oct 2025#8

Thank you — that answers what I came here to find out.

0 likes 9mo
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m.amankwahTL213 Oct 2025#9

Maintenance series are the ones this subcategory needs most and receives least. The interesting questions all change once loss stops.

I would put this at better than even and not much better.

2 likes 9mo
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NLoughranTL3Regular14 Oct 2025#10

Helpful, and easy to find again, which is half of what a good reply is.

9 likes 9mo
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n.rahimiTL214 Oct 2025#11
NLoughran, post #10: Helpful, and easy to find again, which is half of what a good reply is. Go to post

On post #7 — agreed on the reasoning, with one qualification.

On 40-week log: the maintained page in the documentation commons covers the general case with citations and a review date, which is more reliable than any reply here including this one.

0 likes in reply to #10 9mo
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p.amankwahTL214 Oct 2025#12

This is the sort of exchange that makes the archive worth searching.

23 likes 9mo
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n.lehtinenTL214 Oct 2025#13

A plateau over two weeks is usually measurement. A plateau over two months is usually energy balance. The timescale is what distinguishes them.

7 likes 9mo
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l.dziedzicTL215 Oct 2025#14

Small correction to my own earlier position on 40-week log. I had the units the wrong way round, which changes the conclusion by an order of magnitude and therefore changes it entirely.

1 like 9mo
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e.kimaniTL215 Oct 2025#15
n.lehtinen, post #13: A plateau over two weeks is usually measurement. A plateau over two months is usually energy balance. The timescale is what distinguishes them. Go to post

Same experience here, different supplier, so it is at least not unique to one of them.

0 likes in reply to #13 9mo
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KnowltonTL3Regular15 Oct 2025#16

Post #14 is right about the mechanism and I think understates the practical bit.

My experience of 40-week log contradicts the reply above. I am posting it as a data point rather than as a refutation, because one person's experience is exactly that.

31 likes 9mo
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e.ferrariTL215 Oct 2025 · edited#17

Rate of change matters more than the absolute number for most of the questions people ask about their own series.

The variance between people here is larger than the effect being discussed.

11 likes 9mo
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s.silvaTL216 Oct 2025#18

Nothing here is medical advice and a progress report is a description of what happened to one person under uncontrolled conditions.

3 likes 9mo
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v.szaboTL3Analytical chemist16 Oct 2025#19

Taking 40-week log seriously for a moment rather than deflecting: the honest position is that the community has observations and no controlled comparison, and those two things support very different sentences.

24 likes 9mo
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h.vargaTL216 Oct 2025#20
v.szabo, post #19: Taking 40-week log seriously for a moment rather than deflecting: the honest position is that the community has observations and no controlled comparison, and those two things support very different sentences. Go to post

Longitudinal report with the method stated: same scale, same time of day, same conditions. A scale is a tool; use the same one each time. Consistency matters more than accuracy at capturing absolute weight.

One case, stated as one case.

11 likes in reply to #19 9mo
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p.silvaTL216 Oct 2025#21

Post #20 is right about the mechanism and I think understates the practical bit.

40-week log sits at the boundary between what this community can usefully discuss and what it cannot, and I think it falls on the discussable side, narrowly.

31 likes 9mo
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a.almeidaTL216 Oct 2025#22

A single scale used throughout beats a more accurate scale introduced halfway through. Consistency beats accuracy for a trend.

0 likes 9mo
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a.weissTL217 Oct 2025#23

Thank you for taking the time. That was more work than a reply usually is.

3 likes 9mo
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k.roosTL217 Oct 2025#24
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j.delacroixTL3Regular17 Oct 2025#25
k.roos, post #24: I read post #22 twice before replying, because I had assumed the opposite. Trying to state the 40-week log position in a way that someone who disagrees would recognise as fair, because I do not think the version in this thread passes that test. Go to post

If a pattern survives a rolling-mean treatment it is worth explaining. Most do not, and that is the useful finding.

23 likes in reply to #24 9mo
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i.brobergTL217 Oct 2025#26

An honest declaration on 40-week log: I have a prior here and it is strong enough that you should weight what I say downward. Stating it rather than hiding it.

0 likes 9mo
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h.mukherjeeTL1Member17 Oct 2025#27

Picking up post #25: that is the part I would want checked first.

Small methodological point on 40-week log: repeating a measurement is cheap and resolves most of what is being argued about here at no cost to anyone.

1 like 9mo
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m.malinowskiTL218 Oct 2025 · edited#28

Understood. Thank you for being specific about the limits of it.

6 likes 9mo
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cannula_notesTL2Member18 Oct 2025#29
crossover_review, post #2: Whatever the answer on 40-week log turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, invite the correction. Go to post

Non-scale victories: muscle gain or maintenance, clothing fit, energy level, and capability (like climbing stairs without breathlessness) are measurements that scale-based weight misses.

That holds for the case as described. Change the assumptions and it may not.

0 likes in reply to #2 9mo
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b.brandtTL218 Oct 2025#30

Clear enough that I do not think I have a follow-up, which is unusual.

3 likes 9mo