Body Analysis

What is body fat weight?

Body fat weight is the weight of fat your body is carrying. It is important for the body to store certain levels of fat to function properly; however, carrying too much or too little body fat can be dangerous.

Why should I measure my body fat weight?

Measuring and tracking your body fat gives you another tool to monitor your overall health. For example, a person might be a perfectly healthy weight, but could be carrying too much or too little body fat. It is especially important to monitor your body fat as you exercise. Regular exercise will help you to develop lean tissue (muscle mass), which may mean you gain weight overall but lose body fat.

How does it work?

While body fat can be measured in many ways, the method used in your scale is bioelectrical impedance. This indirect method of determining body fat starts when a safe and very low electrical current is sent through the lower half of the body. The electrical current flows more quickly through water and muscle than it will through bone and fat. The scale measures the speed of the current. Based on this number, the scale estimates body fat using a multi-step mathematical formula.

Is it accurate? Close Answer [-]
Measurements of body fat tend to fluctuate a lot more than simple weighing, and different methods of estimating body fat yield very different results. Just as different scales may give different results, different body fat analyzers can provide very different body fat estimates. Even with the same scale the numbers will vary because:

  • Weight loss tends to produce substantial, continuous, and unpredictable changes in body water content. Because body fat analysis is determined by water content in the body, results can vary considerably from day to day.

  • Hydration status affects body fat results. If you've just worked out, there is less water for the electrical current to flow through. This may result in a higher body fat result. In the same way, if you measure your body fat after drinking a lot of fluid, it may appear that body fat is lower than it really is.

  • Skin temperature can have an influence too. Measuring body fat in warm, humid weather when skin is moist will yield a different result than if when skin is cold and dry.

  • Results may not be accurate for persons under the age of 16, or persons with an elevated body temperature, diabetes or other health conditions.

  • As with weight, when your goal is to change body composition it is better to track trends over time than to use individual daily results.
What is body fat %? Close Answer [-]
Body fat % is the % of your total body weight that is made up of fat. It is important for the body to store certain levels of fat to function properly. However, carrying too much or too little body fat can be dangerous. Remember, as you lose weight, you will lose body fat, but your body fat % may not change. To check out changes in your body fat, it´s important to look at your body fat weight readings. Percent body fat refers to the number of pounds of fat divided by your total body weight and multiplied by 100.
Why should I measure my body fat %? Close Answer [-]
Measuring and tracking your body fat gives you another tool to monitor your overall health. For example, a person might be a perfectly healthy weight, but could be carrying too much or too little body fat. It is especially important to monitor your body fat as you exercise. Regular exercise will help you to develop lean tissue (muscle mass), which may mean you gain weight overall, but lose body fat.