Beurer BG 21 - Muscle Percentage Evaluation; Body Mass Index (BMI) Classification; Basal Metabolic Rate (BMR); Active Metabolic Rate (AMR)

14
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.
Musclepercentage:
Themusclepercentage(%)isnormallywithinthefollowingranges:
Man Woman
Age low normal high Age low normal high
10–14 <44% 44–57% >57% 10–14 <36% 36–43% >43%
15–19 <43% 43–56% >56% 15–19 <35% 35–41% >41%
20–29 <42% 42–54% >54% 20–29 <34% 34–39% >39%
30–39 <41% 41–52% >52% 30–39 <33% 33–38% >38%
40–49 <40% 40–50% >50% 40–49 <31% 31–36% >36%
50–59 <39% 39-48% >48% 50–59 <29% 29–34% >34%
60–69 <38% 38–47% >47% 60–69 <28% 28–33% >33%
70–100 <37% 37–46% >46% 70–100 <27% 27–32% >32%
Bodymassindex(BMI)
Thebodymassindex(BMI)isanumberthatisoftencalledupontoevaluatebodyweight.Thegureiscalculated
frombodyweightandheight.Theformulais:bodymassindex=bodyweight:height².Themeasurementunitfor
BMIis[kg/m²].AccordingtotheBMI,weightisclassied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
BMR
Thebasalmetabolicrate(BMR)istheamountofenergyrequiredbythebodyatcompleteresttomaintainitsbasic
functions(e.g.whilelyinginbedfor24hours).Thisvaluelargelydependsonweight,heightandage.Itisdisplayed
on the diagnostic scale in kcal/day units using the scientifically recognized Harris-Benedict formula.
Your body requires this amount of energy in any case and it must be reintroduced into your body in the form of
nutrition. If you take on less energy over the longer term, this can be harmful to your health.
AMR
Theactivemetabolicrate(AMR)istheamountofenergyrequireddailybythebodyinitsactivestate.
The energy consumption of a human being rises with increasing physical activity and is measured on the diagnos-
ticscaleinrelationtothedegreeofactivityentered(1–5).
To maintain your existing weight, the amount of energy used must be reintroduced into the body in the form of food
anddrink.Iflessenergyisintroducedthanisusedoveralongerperiodoftime,yourbodywillobtainthedierence
largely from the amount of fat stored and your weight will reduce. If, on the other hand, over a longer period of time
moreenergyisintroducedthanthetotalactivemetabolicrate(AMR)calculated,yourbodywillbeunabletoburn
otheexcessenergy,andtheexcesswillbestoredinthebodyasfatandyourweightwillincrease.