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understanding
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Percent Body Fat
The amount of fat in the body expressed as a percentage of total
body weight.
Fat Body Weight (or Fat Mass)
Fat body weight is the total weight of all fat in the body. Fat consists
of all the extractable lipids from adipose and other tissues in the
body. External or outer adipose tissue is often referred to as subcutaneous
fat, and internal or deep adipose tissue is referred to as visceral
fat.
Lean Body Weight (or Fat-Free Mass)
Lean body weight is the total amount of lean (nonfat) parts of the
body. It consists of approximately 73% water, 20% protein, 6% mineral,
and 1% ash. Lean body weight contains virtually all the body's water,
all the metabolically active tissues, and is the source of all metabolic
caloric expenditure.
Basal Metabolic Rate (BMR)
Basal metabolic rate is the number of calories consumed at a normal
resting state over a 24-hour period. BMR is based solely on an individual's
lean body weight.
Total Body Water (TBW)
Total body water is the amount of water contained in the body expressed
in liters.
Total Body Water as a Percentage of Body Weight
The amount of water contained in the body expressed as a percentage
of total body weight. Men generally have between 50 and 60 percent
water to body weight and women have between 45 and 60 percent.
Total Body Water as a Percentage of Lean Weight
The amount of water contained in the body expressed as a percentage of
lean body weight. Normal percentages (or hydration levels) indicate that
lean body weight contains approximately 69 to 74 percent water.
Bioresistance (R)
Bioresistance (or resistance) is the effect on an alternating current that
is caused by resistivity or the energy dissipating characteristics of the
body. Resistance is measured directly from the human body by the bioimpedance
analyzer.
A low resistance is consistent with large amounts of lean body weight (or
fat-free mass). A high resistance is consistent with low amounts of lean
body weight.
Target Recommendations
After a test, the analyzer automatically provides target recommendations for Percent Body Fat, Total Weight, Fat Weight, Lean Weight, Weight to Lose and BMR. Recommendations are based on the following optimal body fat values which are stored in the analyzer’s memory:
| Subject's Age |
Optimal Fat Levels |
| |
< |
20 |
15 |
19 |
| 20 |
- |
29 |
16 |
20 |
| 30 |
- |
39 |
17 |
21 |
| 40 |
- |
49 |
18 |
22 |
| 50 |
- |
59 |
19 |
23 |
| 60 |
+ |
|
20 |
24 |
Initial recommendations are based on target fat values equal to either
the subject’s current percent fat or the optimal percent fat value, whichever
is smaller. Recommendations may be adjusted by using the TARGET key. Refer
to setting targets for
information on adjusting target recommendations. |
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