17
measurement unit for BMI is [kg/m²]. According to the BMI, weight is classified for adults (20 years and
over) using the following values:
Category
BMI
Underweight
Severely underweight
< 16
Underweight
16-16.9
Slightly underweight
17-18.4
Normal weight
18.5-25
Overweight
Overweight
25.1-29.9
Obese (overweight)
Class I obesity
30-34.9
Class II obesity
35-39.9
Class III obesity
≥ 40
Body fat percentage
The following body fat percentages are guide values (contact your physician for further information).
Man
Woman
Age
low
normal
high
very high
Age
low
normal
high
very high
10 –14
<11 %
11–16 % 16,1– 21 % >21,1 %
10-14
<16 %
16 – 21 % 21,1– 26 % >26,1 %
15 –19
<12 %
12 –17 % 17,1– 22 % >22,1 %
15-19
<17 %
17– 22 % 22,1– 27 % >27,1 %
20 – 29
<13 %
13 –18 % 18,1– 23 % >23,1 %
20-29
<18 %
18 – 23 % 23,1– 28 % >28,1 %
30 – 39
<14 %
14 –19 % 19,1– 24 % >24,1 %
30-39
<19 %
19 – 24 % 24,1– 29 % >29,1 %
40 – 49
<15 %
15 – 20 % 20,1– 25 % >25,1 %
40-49
<20 %
20 – 25 % 25,1– 30 % >30,1 %
50 – 59
<16 %
16 – 21 % 21,1– 26 % >26,1 %
50-59
<21 %
21– 26 % 26,1– 31 % >31,1 %
60 – 69
<17 %
17– 22 % 22,1– 27 % >27,1 %
60-69
<22 %
22 – 27 % 27,1– 32 % >32,1 %
70 –100 <18 %
18 – 23 % 23,1– 28 % >28,1 %
70-100 <23 %
23 – 28 % 28,1– 33 % >33,1 %
A lower value is often found in athletes. Depending on the type of sports, training intensity and physical
constitution, values may result which are below the recommended values stated. It should, however, be
noted that there could be a danger to health in the case of extremely low values.
Body water percentage
The body water percentage is normally within the following ranges:
Man
Woman
Age
poor
good
very good
Age
poor
good
very good
10 –100
<50 %
50 – 65 %
>65 %
10 –100
<45 %
45 – 60 %
>60 %
Body fat contains relatively little water. Therefore persons with a high body fat percentage have body
water percentages below the recommended values. With endurance athletes, however, the recommended
values could be exceeded due to low fat percentages and high muscle percentage.
This scale is unsuitable for measuring body water in order to draw medical conclusions concerning
age-related water retention, for example. If necessary ask your physician. Basically, a high body water
percentage should be the aim.
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