The fabulously beautiful planet of Bethselamin is so concerned about the erosion caused by ten billion tourists per year that the net balance between the amount you eat and the amount you excrete while on the planet is surgically removed from your body weight when you leave: so every time you got to the lavatory there it is vitally important to get a receipt — Douglas Adams
Your weight changes on many different timescales: second by second as you inhale and exhale, hour by hour as you eat and excrete (be sure to get a receipt), day by day as the size and timing of your meals changes, and week by week as your true weight drifts in response to your overall intake and expenditure of energy. The official Wii Fit line is that weight can vary by as much as two pounds during the day, which is why you should weigh yourself at the same time every day, under the assumption that you take regular meals and are, well, regular. The trouble is, the Wii Fit only tracks daily weight, and day-to-day your weight (well, my weight) can easily change by two pounds, even if measured at the same time.
What you really need, and what the Wii doesn’t provide, is a graph of the running average of your weight, say, with a five-day or one week average. Enter, The Hacker’s Diet.
The Hacker’s Diet, notwithstanding its silly subtitle, is a serious book about how to lose weight and permanently maintain whatever weight you desire. It treats dieting and weight control from an engineering and management standpoint, and provides the tools and an understanding of why they work and how to use them that permit the reader to gain control of their own weight. The book is intended primarily for busy, successful engineers, programmers, and managers who have struggled unsuccessfully in the past to lose weight and avoid re-gaining it. Computer-based tools and experiments in Microsoft Excel or the Palm Computing Platform are available, as well as an online Web application, but a computer is not necessary to use the techniques described in the book; paper and pencil alternatives are provided. — John Walker
The book, available in .pdf and ebook formats, as well as online, is by John Walker, founder of Autodesk, Inc. developers of the AutoCAD program. He’s not a dietician, but his recommendations make sense. Particularly the ones about averaging your weight over five days or so, and watching that trend line. The book is free to download and distribute.
It’s too bad that the Wii doesn’t offer any way to automate this process. It could do those calculations very easily. Or it could save the data files in a format that we could read, so that we could do it. But Nintendo, like all the other companies out there, is bound and determined to control how its product is used, and if it doesn’t feel like providing a certain capability it certainly doesn’t want anyone else doing it. That would cut their revenue stream.