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Weight and 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?
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 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 also. Measuring body fat in warm humid
weather when skin is moist will yield a different result than if skin is cold and dry.
• 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.
• Results may not be accurate for persons under the age of 16, or persons with
an elevated body temperature, diabetes or other health conditions.
What you need to know!
• Percent body fat refers to the number of pounds of fat divided by your total body
weight and multiplied by 100.
• During weight loss, percent body fat doesn't appear to be reduced as quickly
as expected because total weight loss and total body fat are decreasing at the
same time (for a more detailed explanation, see next section).
• Weight loss in the form of body fat and lean tissue (muscle) is common, and
is normal.
• To minimize the loss of lean tissue, include regular physical activity, especially
strength training, in your weight-loss plan.
Why do I lose weight but my body fat percentage doesn't change much?
Most body fat monitors show body fat as a percentage only. This body fat
monitor shows you not only a percentage but the actual number of body fat
pounds (in fact, this is the measurement you see after your weight is displayed).
Why is that important? When you lose weight, both the numerator (pounds of
body fat) and denominator (total body weight) go down, so when it's calculated as
a body fat percentage, the number can be small. For example, a person may weigh
200 pounds and have 40% body fat (= 80 pounds of body fat). He/She loses
20 pounds, but the body fat has only dropped 4% to 36%. That 4% of body fat was
16 pounds of fat – a very significant amount! So do not be overly concerned if you
do not see the percentage change quickly as you are losing weight: monitor the
absolute number of body fat pounds lost. Remember, to minimize the loss of
lean tissue, include regular physical activity, especially strength training, in your
weight-loss plan.
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Table of Contents
Related Manuals for Weight Watchers WW67WC
Summary of Contents for Weight Watchers WW67WC
- Page 1 Weight and 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.
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Page 2: Before Using Scale
Before Using Scale Precautions for Use CAUTION! Use of this device by persons with any electrical implant such as a heart pacemaker, or by pregnant women, is not recommended. 1. Set switch on the base of the scale to measure in pounds (lb) or kilograms (kg). 2. -
Page 3: Facts You Should Know
Don’t Overdo It! A surefire way to get overly concerned with your weight is to weigh yourself too often. We generally recommend weighing yourself no more than once a week when you’re dieting. Though it’s hard to stick to this pattern, it’s the best way to prevent unnecessary concern with normal weight fluctuations, which are unrelated to your weight-loss efforts. - Page 4 Weight Watchers bathroom scale Congratulations! By purchasing this Weight Watchers Scale, you’ve made the first step toward taking control of your weight. To get the greatest benefit from your purchase, please read this entire brochure before using your scale. Model #WW67WC...
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Page 5: Weight Management
Make the most of it! To summarize, make the most of the body analysis feature by: • Tracking change over time and not day to day. • Using the same scale as much as possible. • Being extra-consistent in the time of day, day of the week, time before or after food and fluid consumption, before or after exercise, etc., when measuring body composition. - Page 6 Scale displays a low battery warning: “Lo” LIMITED TEN YEAR WARRANTY Conair will repair or replace, at our option, your appliance free of charge for 120 months from the date of purchase if the appliance is defective in workmanship or materials.
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Page 7: Body Water
Body Analysis Table Always keep in mind that you know your body best. The following ranges of body fat, BMI, body water and bone mass are offered as guides. on target high <20 20-25 Body Fat Male 20-29 <13% 13-23% 23.1%+ 30-39 <14... - Page 8 6. Now “BW” (body water) percentage displays for a few seconds. One of the color bars will light up to indicate whether your body water is high (red bar), on target (green) or low (yellow bar). 7. Next, “BM” (bone mass) percentage displays for a few seconds. One of the color bars will light up to indicate whether your bone mass is high (red bar), on target (green) or low (yellow bar).
- Page 9 Body water/hydration levels General health standards indicate that one should consume approximately 64 oz of water per day from food and liquids to maintain a healthy level of hydration. Maintaining a good hydration level will help improve your overall health and general feeling of well-being.
- Page 10 Body Analysis Measurement 1. Operate the scale on a secure flat floor. Tap the scale to turn it on. Wait until “0.0” appears. 2. Press user button repeatedly until you get to your user number. Scale will display the stored data: user number, height, age, gender. 3.