Body water -why measure it, Normal healthy range of bodywater percentage, Why should i know my muscle mass – Salter 9153 SS3R Stainless Steel Analyser Scale User Manual

Page 4: What does my bmi value mean, Basal metabolic rate (bmr) - what does it mean, Questions & answers

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body Fat % Ranges for Men**






19 - 39


8.1 - 19.9

20 - 24.9


40 - 59


11.1 - 21.9

22 - 27.9




13.1 - 24.9

25 - 29.9


body Fat % Ranges for women**






19 - 39


21.1 - 32.9

33 - 38.9


40 - 59


23.1 - 33.9

34 - 39.9




24.1 - 35.9

36 - 41.9


*Source: Derived from; HD McCarthy, TJ Cole, T Fry, SA Jebb and AM Prentice: “Body fat reference curves for children”.

International Journal of Obesity (2006) 30, 598–602.

**Source: Derived from; Dympna Gallagher, Steven B Heymsfield, Moonseong Heo, Susan A Jebb, Peter R Murgatroyd,

and Yoichi Sakamoto: “Healthy percentage body fat ranges: an approach for developing guidelines based on body mass

index1–3”. Am J Clin Nutr 2000;72:694–701.

The Body Fat % ranges published are for guidance only. Professional medical guidance should always be sought before

embarking on diet and exercise programs.

boDy wATER -why MEASuRE IT?

Body water is the single most important component of body weight. It represents over

half of your total weight and almost two thirds of your lean body mass (predominantly

muscle). Water performs a number of important roles in the body:

All the cells in the body, whether in the skin, glands, muscles, brain or anywhere else,

can only function properly if they have enough water. Water also plays a vital part in

regulating the body’s temperature balance, particularly through perspiration.

The combination of your weight and fat measurement could appear to be ‘normal’ but

your body hydration level could be insufficient for healthy living.


body water Chart***

BF % Range

Optimal BW % Range


4 to 14%

70 to 63%

15 to 21%

63 to 57%

22 to 24%

57 to 55%

25 and over

55 to 37%


4 to 20%

70 to 58%

21 to 29%

58 to 52 %

30 to 32 %

52 to 49%

33 and over

49 to 37%

***Source: Derived from Wang & Deurenberg: “Hydration of fat-free body mass”.

American Journal Clin Nutr 1999, 69 833-841.

For those using Athlete Mode: note that athletes may have a lower body fat range and a

higher body water range than shown above, depending on their type of sport or activity.

Body water measurement results are influenced by the proportion of body fat and

muscle. If the proportion of body fat is high, or the proportion of muscle is low then the

body water results will tend to be low. It is important to remember that measurements

such as body weight, body fat and body water are tools for you to use as part of your

healthy lifestyle. As short term fluctuations are normal, we suggest you chart your

progress over time, rather than focus on a single days reading.

The Body Water % ranges published are for guidance only. Professional medical

guidance should always be sought before embarking on diet and exercise programmes.

why ShoulD I kNow My MuSClE MASS?

According to the American College of Sports Medicine (ASCM), lean muscle mass may

decrease by nearly 50 percent between the ages of 20 and 90. If you don’t do anything to

replace that loss you’re losing muscle and increasing fat. It is also important to know

your muscle mass % during weight reduction. At rest, the body burns approximately 110

additional calories for each kilo of muscle gained. Some advantages of gaining muscle

mass include:

• Reversing the decline in strength, bone density and muscle mass that accompanies age

• Maintenance of flexible joints

• Guide weight reduction when combined with a healthy diet.

This product is for domestic use only. Pregnant women should only use the weight function.

CAUTION : Do not use this product if you have a pacemaker or other medical device

fitted. If in doubt, consult your doctor.

whAT DoES My bMI vAluE MEAN?

Body Mass Index (BMI) is an index of weight-for-height that is commonly used to

classify underweight, overweight and obesity in adults. This scale calculates your BMI

value for you. The BMI categories shown in the chart and table below are recognised by

the WHO (World Health Organisation) and can be used to interpret your BMI value.

Your BMI category can be identified using the table below.

bMI Category

bMI value Meaning

health Risk based Solely on bMI

< 18.5




18.6- 24.9



25- 29.9






IMPORTANT: If the chart/table shows that you are outside of a ‘normal’ healthy weight

range, consult your doctor before taking any action. BMI classifications are for adults

(age 20+ years) only.


Your Basal Metabolic Rate (BMR) is an estimation of the energy (measured in calories)

expended by the body, at rest, to maintain normal body functions.This continual work

makes up about 60-70% of the calories the body uses, and includes the beating of your

heart, respiration, and the maintenance of body temperature.Your BMR is influenced by

a number of factors, including age, weight, height, gender, dieting and exercise habits.


how exactly is my body fat and water being measured?

This Salter Scale uses a measurement method known as Bioelectrical Impedance

Analysis (BIA). A minute current is sent through your body, via your feet and legs. This

current flows easily through the lean muscular tissue, which has a high fluid

content, but not easily through fat. Therefore, by measuring your body’s impedance (i.e.

its resistance to the current), the quantity of muscle can be determined. From this, the

quantity of fat and water can then be estimated.

what is the value of the current passing through me when the measurement

is taken? Is it safe?

The current is less than 1mA, which is tiny and perfectly safe. You will not be able

to feel it. Please note however, that this device should not be used by anyone with

an internal electronic medical device, such as a pacemaker, as a precaution against

disruption to that device.

If I measure my body fat and water at different times during the day, it can

vary quite considerably. which value is correct?

Your body fat percentage reading varies with body water content, and the latter changes

throughout the course of the day. There is no right or wrong time of the day to take a

reading, but aim to take measurements at a regular time when you consider your body

to be normally hydrated. Avoid taking readings after having a bath or sauna, following

intensive exercise, or within 1-2 hours of drinking in quantity or eating a meal.