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Weightloss for Nerds

I’m building up for another assault on my weight.

Over the last 15 months I lost 20lbs! Unfortunately no whooping and a hollering is deserved as the net position sees this 20lbs declining to a mere 7lbs loss. I went through 3 clear weightloss phases and as the chart shows, I don’t have too much of a problem in losing weight but a big problem when it comes to maintaining a constant weight.

weighthistory

(Note that all the graphs can be enlarged by clicking on them)

Fortunately, I have discovered some new tricks for my arsenal. The first is The Hackers Diet, which is a free ebook/webpage designed by John Walker of Autodesk/AutoCAD fame. He reverts back to his engineering roots to develop a nerdy yet satisfying approach to weightloss and weight maintenance. Particulalry appealing is his approach to trend monitoring, to avoid the boom and bust nature that most dieters will be familiar with.

Boom and Bust

This annotated chart makes me giggle and reminds me why the daily scale ritual tends to leave me so apprehensive. With the hackers diet you continue to monitor your weight daily but you enter the figures into an excel spreadsheet that plots the trend based on an exponential moving average to smooth the noise. Moving averages are explained very well in his section on Signal and Noise. If you haven’t already noticed, I ought to point out that this diet is only going to appeal the real data fiends out there, its not called the hackers diet for nothing. After application of the smoothing, the above chart now looks like this:

Weight smoothing

The point of this is that the red smoothed line, illustrates the very satisfactory weightloss situation, suggesting that the diet and required monitoring could proceed without need for prozac. I’m convinced that I keep stopping perfectly successful diets because of the misery I feel when the scales tell me the wrong number, regardless of how transient that may prove to be.

Each individual data point (daily weight) will either appear above or below the trend line, below is obviously great as it means that it is having the effect of pulling the trend even lower. The odd appearance above the trend isn’t too worrying either as individually their impact on the trend is insignificant. You can get even more deeply into the system and determine your bodys energy balance, going as far as planning your required intake etc. I’m not going to look at this just yet. It suits me to develop the system for monitoring purposes, possibly using it alongside the BodyForLife program that I’ve had success with previously.

All the excel spreadsheets designed for Hackers Diet are available free on the site mentioned above - they really are worth delving into if like me you go crazy for complex excel constructions and his manual is extensive, explaining the process far better than I have.

My second great discovery is the PhysicsDiet, which is an online fitness log/charting site developed to support the Hackers Diet. So many geeks have been successful with the hackers diet that complementary programs are popping up all over the place. The physics diet uses the same maths as the hackers diet spreadsheets but visually it is far more exciting. I’m going to maintain both the spreadsheet and online version for a while but I think I will use charts like these to post my progress:

Physics Diet

This shows the January results and so long as I can keep the chart green, I’m smiling.

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4 Comments »

  celeste wrote @ January 30th, 2007 at 2:56 am

I have never heard of the Hackers Diet - but will check out the link. Thanks! Had a brief look and it’s intriguing!

  nattie wrote @ January 30th, 2007 at 6:11 pm

hey, i love that book! i found it last year and got his palm app. don’t use the weight thing anymore, but i’m still doing my “rungs” every morning. kinda stuck on 25 right now…
btw, you had stopped by my blog asking what software package i had used for my race packing lists… i merely used windows notepad and captured screen shots of the active window (bu using alt + prt scr), pasting them onto windows paint and saving them as bitmaps. they look good, don’t they?

  JoggerBlogger wrote @ January 30th, 2007 at 9:29 pm

Hope the weight loss goes well. It can be a tricky thing to get right.

  Danny wrote @ February 5th, 2007 at 9:19 pm

Love the graphs! (I’m just trying to figure out when to buy and sell…)

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