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

Three things.

How hydrated you are: Remember, a gallon (128 oz) is 8.33 lbs. So if you drink a 15 oz bottle of water you just gained a lb until your body uses it.

When you last ate/pooped: Eat a 16 oz steak, a baked potato, and some veggies for dinner? That could be 2 lbs right there until you poop.

Similar to the first point but, how much sodium you’ve been consuming. A big salty meal will make your body try to retain more and more water which could throw your weight off the next day or two.

If you’re eating in a caloric deficit, you will lose **fat**. However your **weight** may not go down due to the 3 notes above. But in the long run you will lose more fat than those water/salt/food fluctuations can outgain so your weight *will* go down.

The key to tracking your weight is just weighing yourself at the same time every day, wake up, pee, weigh yourself. Precision is more important than accuracy for tracking weight loss

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