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Is It Possible to Gain Weight Within an Hour Without Eating or Drinking?

by
author image Jenna Morris
Jenna Morris began writing in 2010 for various websites. She holds a Bachelor of Fine Arts in graphic design from Columbia College Chicago and in 2007 she became a certified yoga instructor and NASM-certified personal trainer.
Is It Possible to Gain Weight Within an Hour Without Eating or Drinking?
An overhead view of an empty bowl and spoon. Photo Credit Mizina/iStock/Getty Images

Weight can fluctuate for a variety of reasons. If you weigh yourself before bed and the following morning, the two numbers are often different, by even as much as 5 lbs. While it takes 3,500 calories to gain 1 lb., you may still see a fluctuation of weight even if you don't ingest anything during the course of an hour.

Gaining Weight

Weight gain occurs when you consume more calories than you've expended. One pound is equal to 3,500 calories. While your scale may read a 5-lb. difference in just one night's time, it's highly unlikely that you've actually gained weight, unless you happened to consume 17,500 calories overnight.

One Hour Weight Gain

It is possible for your weight to change in the course of an hour even if you haven't consumed anything. While drinking two glasses of water is equal to 1 lb. of weight, not drinking water when you're thirsty can lead to water retention and temporary weight gain as well. While it is not a permanent weight gain, it is possible for the number on the scale to change within an hour.

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Other Weight Fluctuations

Temporary weight gain can be caused by water retention, menstrual periods and overconsumption of salty foods. The food you eat also weighs something. So while you wouldn't stand on the scale holding a 6-inch sub in your hand, you probably wouldn't want to weigh yourself right after consuming it either. Weighing yourself after exercise can show a lower number due to sweating and dehydration.

When to Weigh Yourself

If your weight is something you would like to monitor, you should weigh yourself consistently at the same time and under the same circumstances. Due to daily weight fluctuations, the Bally Fitness website recommends weighing yourself once a week on the same day. Weighing yourself in the morning is best, before eating or drinking anything, and since clothes have varying weights, weigh yourself in the buff.

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