Body fat fluxuation?
- 12-31-2007, 09:55 AM
- 12-31-2007, 01:50 PM
Is your weight changing also? Multiply it across your weight for those days to get actual lbs of fat tissue. Does that look a little more even?
12-31-2007, 03:30 PM
Weight fluctuates a couple pounds, but that's after I eat... I usually check it an hour after getting back from the gym in the morning
12-31-2007, 03:43 PM
To get the best and most consistent results with a good Bioelectrical Impendance (BIA) unit, you should take the measurements first thing in the morning with no exercise the night before and no alcohol two days prior to measurement.Originally Posted by russy_russ;
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12-31-2007, 03:48 PM
amen. Working out is doing very unpredictable things to your water and glycogen levels so you're not getting a good reading. Also, if your scale gives you a muscle mass % as well, use the ratio of the two numbers as a guide, as it will eliminate a lot of other variables.
12-31-2007, 06:06 PM
Due to the hydration factor, variability of bodyfat by 2 to 3 percentage is very common. A 12 hour dehydration period will give you a more accurate reading. Easiest and safest way to go about that is to not drink water after 8:00pm and weigh yourself at 8:00am the next morning.
BIA bodyfat measurement is far superior to the BMI equation which doesn't account for muscle mass, but simply bodymass, which is null & void to someone who resistance trains. However, BIA instruments are either the hand held versions, where the electric pulse travels through your upper extremities, or they're the scale versions, where the electric pulse travels through your lower extremities. Your lower extremities are for the most part, naturally leaner and naturally contains more muscle mass, so you are likely to have a variable reading between the hand held version and the scale version, with the scale version generally giving you a more favorable reading.
With that said, regardless of the variability of an upper or lower extremity reading, a BIA score is still good for measuring progress. If you were 25% bodyfat, right or wrong, if it says 20% in two weeks, it's still quality information for tracking progress.
Take home message: The drier you are, the more accurate your reading. Whether that reading is the perfect number or not, you have a base to track your progress in the coming weeks and months.
NSCA - CSCS
12-31-2007, 06:35 PM
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