How to Interpret the Chart
Hover over the flags to see notes on some of the significant weight changes... then on any links in the small box that pops up to see the Twitter or blog posts I wrote at the time.
You can scroll to the left using the scroll bar under the chart to see older data.
I update the online data every few weeks or so.
Each night I am at home (and sober enough) I weigh myself on a set of Tanita scales. I've been doing this since 2005. You may say this is a little obsessive, and you'd probably be right.
The scales have metal plates to measure the electrical resistance through the body, the facility to enter your height and, obviously, they also weigh you. After a few seconds the readout indicates the percentage of your weight that is fat - I believe it uses tables of data based on population averages to infer this.
The percentage fat reading is subject to fluctuation. Room and skin temperature have an effect, as do hydration levels. There may be other factors.
The weight reading is subject to fluctuation too. Hydration levels, recency of bowel movement and water retention (due to fluctuating salt intake) are the three main factors I have observed. The steadiness of the weight line it's a good indication of how regulated (and usually how healthy) my life has been over a given period.