Beurer BG 13 - Инструкция по эксплуатации - Страница 13

13

The measuring principle

This scale works on the principle of B.I.A. (bioelectrical impedance analysis). This involves the calculation of body 

content within seconds, using a current that is not noticeable, is completely non-hazardous and does not pose 

any risk.

When this measurement of the electrical resistance (impedance) is considered alongside constants and/ or indi-

vidual values (age, height, gender, activity level), the body fat percentage and other variables in the body can be 

calculated. Muscle tissue and water conduct electricity well and therefore have a lower resistance. In contrast, 

bones and fat tissue have low conductivity as the fat cells and bones are barely able to conduct the current due 

to very high levels of resistance.

Please note that the values calculated by the diagnostic scale only represent an approximation of the actual medi-

cal analytical values for the body. Only a specialist doctor can precisely establish the body fat, body water, muscle 

percentage and bone structure using medical methods (e.g. computer tomography).

3. Evaluation of results

Body fat percentage

The following body fat percentages are for guidance (contact your physician for further information).

Man 

    Woman

Age

very 

good

good

average

poor

Age

very 

good

good

average

poor

10–14

<11%

11–16%

16,1–21% >21%

10-14

<16%

16-21%

21,1-26%

>26%

15-19

<12%

12-17%

17,1-22%

>22%

15-19

<17%

17-22%

22,1-27%

>27%

20-29

<13%

13-18%

18,1-23%

>23%

20-29

<18%

18-23%

23,1-28%

>28%

30-39

<14%

14-19%

19,1-24%

>24%

30-39

<19%

19-24%

24,1-29%

>29%

40-49

<15%

15-20%

20,1-25%

>25%

40-49

<20%

20-25%

25,1-30%

>30%

50-59

<16%

16-21%

21,1-26%

>26%

50-59

<21%

21-26%

26,1-31%

>31%

60-69

<17%

17-22%

22,1-27%

>27%

60-69

<22%

22-27%

27,1-32%

>32%

70-100

<18%

18-23%

23,1-28%

>28%

70-100

<23%

23-28%

28,1-33%

>33%

A lower value is often found in athletes. Depending on the type of sports, training intensity and physical constitu-
tion, 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:

The body water percentage (%) is normally within the following ranges:

Man 

    Woman

Age

poor

good

very good

10-100

<50%

50-65%

>65

Age

poor

good

very good

10-100

<45%

45-60%

>60

Body fat contains relatively little water. Therefore persons with a high body fat percentage have body water per-

centages below the recommended values. With endurance athletes, however, the recommended values could be 

exceeded due to low fat percentages and high muscle percentage.

Body water measurement with this scale is not suitable for drawing medical conclusions, for example concerning 

age-related water retention. If necessary ask your physician.

Basically, a high body water percentage should be the aim.