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

My guess is that it’s just water weight. The trick to getting a consistent reading is to have a consistent routine. Weighing yourself first thing in morning after urinating is ideal, I also try to avoid drinking too much water before a weigh-in day. Believe it or not you still perspire and respirate when you sleep, so you’re constantly losing weight asleep.

There’s just so much variability weighing yourself daily, people pee anywhere from 800-2000mls daily and that’s up to 4.4lbs (2kg).

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