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The physics of weight

The physics of weight, the case against counting, what the eating-window trials actually found, and how to run the method. Every number links to its paper.

The physics of weight

Why does my weight change 5 lbs in a day?

The physics of weight / September 16, 2026

You weighed 178 on Friday. Monday morning it’s 182. You ate normally. Nothing’s wrong with you and nothing’s wrong with the scale; you just watched water move. Here’s what actually happened, with the numbers.…

Why does my weight change 5 lbs in a day? Read Post »

The Body Arcade is a measurement and tracking tool. It is not medical advice, diagnosis, or treatment, and it is not a substitute for care from a qualified healthcare provider. The method described here reflects one person’s self-experimentation and published research on related topics; it has not been clinically validated as a program. Individual results vary. Consult a doctor before making changes to your diet or exercise, particularly if you have any medical condition, are pregnant or breastfeeding, or take prescription medication.