&gt; <i>I think this is quite normal and why people recommend not measuring yourself every day.</i><p>&gt; <i>I weigh myself every day or two but only really watch a fortnightly average as a key value(...)</i><p>That&#x27;s the key. I was always under the impression that the reason for advising people against weighing daily is because you can&#x27;t rely on general population to understand the concepts of moving average and low-pass filtering. Personally, I try to weigh daily (easier to keep a habit this way), but I care only about the 7-day moving average.