If you are using a body fat scale or monitor, your body fat % reading is affected by the
amount of water in your body.
Because the amount of water in your body is constantly fluctuating, so will the estimate of your body fat %.
If the amount of water in your body:
- decreases, your estimated body fat % will fluctuate up.
- increases, your estimated body fat % will fluctuate down.
How do body fat scales work?
The amount of water in your body decreases after:
The amount of water in your body increases after eating or drinking.
To minimize fluctuations in your body fat %, measure your body fat at the same time, in the same environment and under the same circumstances each time.
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