what is happening when a person’s weight fluctuates multiple lbs day to day?

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I have been eating at a calorie deficit for a few months with successful weight loss, but I’ll have random weeks where it is very inconsistent day to day. Past three days I see very small or no changes to weight, sometimes even increase. Then this morning I am 4 lbs lighter than I was yesterday. If anything I ate MORE than usual yesterday, and I don’t think I used the bathroom more than normal nor was I exceptionally sweaty. Where did those 4 lbs go?

In: Biology

6 Answers

Anonymous 0 Comments

Water weight plays a role, as do other factors that change from day to day (the weight of your clothing that day, the time of day you weighed, etc). Try to keep the variables as consistent as possible. Chances are, you didn’t actually lose 4 pounds – more likely there was a measurement error of a pound or so in one direction on the first day and a measurement error of a pound or so in the opposite direction on the second day. Those two errors, coupled with the actual weight change, resulted in the four pound difference you saw.

I’ve been using an app to record my weight. Rather than keeping my focus on the daily measurements, it smooths the graph and uses a rolling average. This is the one I use: https://apps.apple.com/us/app/happy-scale/id532430574

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