Mine stays in a very narrow range when looked at only in the morning before heavy exercise. I can actually predict what it will be based on what and how much I ate the day before. Then, when I exercise (I'm talking two to six hours of aerobic exercise at a high physical output) it drops, only to gradually come back up during the rest of the day. Never more than 16%, almost never less than 14%.

It is almost certain that my actual, true body fat percentage is NOT 14% or 15% or 16%. But the readings are so consistent with the exception of the post-exercise temporary drop that the scale is nonetheless a useful tool for day-to-day monitoring.

tanstaafl.