Topic summary

Seven-day rolling means and why weekly readings mislead — one year on

Outcomes › Progress reports DXA data table long read Solved

This is a generated summary. It shows the 9 most-liked posts from a topic of 89, in their original order, with the accepted answer included where one exists. It is a reading aid and it will miss nuance — the full topic is the record.

tracked_parcelTL2Regular Solution4 Feb 2026#3

Post #2 is right about the mechanism and I think understates the practical bit.

State the method before the numbers. Same scale, same time of day, same conditions — without that a series is a collection of readings rather than a measurement.

25 likes 6mo

p.novotnyTL2Regular7 Feb 2026#15

A seven-day rolling mean of daily readings has a much smaller standard error and makes most apparent plateaus and sudden drops disappear.

Written in the hope of being told what I have missed.

29 likes 6mo

g.pemberton_ukTL3Regional · UK9 Feb 2026#22

s.balogun, post #6: Distinguishing three things in the Seven-day rolling discussion that keep getting used interchangeably: the observation, the proposed mechanism, and the recommendation that gets attached to both. 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.

29 likes in reply to #6 6mo

j.moreauTL210 Feb 2026#29

n.ibarra, post #8: Weighing daily and reporting weekly is a better protocol than weighing weekly, because it separates the measurement frequency from the reporting frequency. A guess, clearly labelled as one. Go to post

Marking my uncertainty on Seven-day rolling 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.

27 likes in reply to #8 6mo

IsaksenTL3Regular11 Feb 2026#34

Post #33 answers the question as asked. The question underneath it is different.

A note on scope: what I am saying about Seven-day rolling applies to the case in the first post and I would not extend it further without checking.

27 likes 5mo

n.torrenceTL3Regular13 Feb 2026#50

ai.vukovic, post #23: This follows post #20 rather than contradicting it. I would put moderate confidence on the mainstream reading of Seven-day rolling and no more. That is not scepticism for its own sake; it is where the sourcing actually stops. Go to post

Day-to-day body mass varies by more than a kilogram on hydration, glycogen and gut contents alone. A weekly reading is one noisy sample of that distribution.

That is a description of practice, not a recommendation of it.

25 likes in reply to #23 5mo

g.rasmussenTL215 Feb 2026#58

Menstrual cycle: for people who menstruate, weight can shift by several pounds across the cycle due to fluid retention and other factors. Noting cycle phase when weighing reduces apparent noise.

28 likes 5mo

t.ndiayeTL218 Feb 2026#82

Post #80 and I disagree about the size of the effect, not about the direction.

I would keep Seven-day rolling and the decision it usually gets used for separate in this thread. They are related and they are not the same question, and merging them is why the last one went badly.

32 likes 5mo

s.lundgrenTL219 Feb 2026#89

m.ekstrom, post #51: Answering the question post #47 raises rather than the one it answers. What I can speak to on Seven-day rolling is narrow, so I will keep it narrow rather than generalising from it. Beyond that boundary I do not know. Go to post

Post #86 is the version of this I will quote in future. One addition.

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

The literature is thinner on this than the confidence in the thread implies.

30 likes in reply to #51 5mo

Read the full topic (89 posts)

This topic was referenced in

What I would record differently if I started againOutcomes › Progress reports · 2 replies
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