Posting this under the heading it deserves: An 18-month record including the parts that went badly Everything below is what sits behind that.
Longitudinal report with the method stated, because a number without a method is not a measurement.
Same scale, same time of day, same conditions, 68 weeks. I have also recorded protein intake and resistance-training sessions, both self-reported and both therefore optimistic.
The reason I am posting is a pattern in the middle of the series that I cannot explain and that I suspect is measurement rather than signal.