BODY 101

So, I never shared with you guys all the wonderful things I learned and I get to monitor now that I am using the fancy Tanita system at Curves!  I know… What a deadbeat, right?  Oh, well!  Better late than never…


Body Mass Index (BMI)

BMI is a standard height to weight ratio useful for classifying risks associated with weight gain.  The World Health Organization (WHO) classification has been developed using the following grading system that links increases to BMI to increased health risks.


Body Mass Index WHO Classification
<18.5 Underweight
18.5 – 24.9 Healthy Weight
25.0 – 29.9 Overweight
30+ Obese


Fat %

Body fat is vital to daily bodily functions.  It cushions joints, protects organs, helps regulate body temperature and stores vitamins.  However, serious health risks are associated with both too much and too little body fat.  Compare your results to your “Desirable Range” in the table below.  By design, women’s bodies require a higher percentage of body fat to be healthy.


Female (age) Underfat (%) Healthy (%) Overfat (%) Obese (%)
20 – 39 0 – 21 21 – 33 33 – 39 39+
40 – 59 0 – 23 23 – 34 34 – 40 40+
60 – 79 0 – 24 24 – 36 36 – 42 42+


Male (age) Underfat (%) Healthy (%) Overfat (%) Obese (%)
20 – 39 0 – 8 8 – 20 20 – 25 25+
40 – 59 0 – 11 11 – 22 22 – 28 28+
60 – 79 0 – 13 13 – 25 25 – 30 30+



Basal Metabolic Rate reflects the amount of calories used by the body to maintain normal functions when at rest.  Daily activities and exercise increase BMR by approximately 15%.  BMR helps you establish just how many calories your body needs in a day to achieve proper energy balance.



Measured in Ohms (Ω), the Impedance value reflects the strength and speed of electrical signal traveling through the body.  Muscle is the signal’s highway, and fat mass is like a traffic jam.  More muscle means it’s easier for the signal to pass through your body, resulting in a lower impedance value and % of body fat.  Consistent conditions and stable hydration status are not only healthy, but will also yield consistent results.


Fat Mass

The body needs fat, but it is important to keep your fat within the recommended range.



Fat Free Mass is everything in the body that is not fat: muscle, water, bone, connective tissue, etc.  Muscle acts as the body’s natural “fat-burning engine,” therefore it is important to maintain or even gain healthy muscle mass when exercising or dieting.



Reflects Total Body Water.  It is important to ensure your body is not dehydrated, especially when exercising or dieting.  TO calculate your hydration level, divide your TBW by your weight and multiply the result by 100.

(TBW/Weight X 100 = Hydration Percentage)


Female 45 – 60%
Male 50 – 65%


Desirable Ranges

Ecverybody needs fat.  These healthy ranges display how much you should have in terms of % and weight.  Research shows that individuals with appropriate amounts of fat are less likely to develop obesity-related health conditions.


Total Body Fat %

Set a realistic goal for body fat %.  Tanita then calculates the approximate amount of fat mass, not just overall weight, but specifically fat mass that needs to be lost in order to achieve the pre-selected target.  Always try to maintain FFM when dieting.


Now, with all this new information, get to calculating and resetting goals for yourself!  If I can do it, you can do it…


About formerfatbitch

I'm a former fat bitch on the path towards becoming a healthy bitch and I'm taking everyone along for the ride with me so saddle up!
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