Weight Loss
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Tanita Scales

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Hey guys. Today in gym class we were weighed on Tanita scales. Which for you that dont know, its a scale that measures you BMI, fat %, water weight, etc. The scale sort of printed out a reciept at the end and it tells you everything, but im not sure what some of them mean. Heres what it looks like:

Body Type: Standard

Gender: Female

Age: 15


weight: 119.4 lbs

BMI: 19.3

Fat Percentage: 15%

And i understand those things but heres the rest of it that i have no clue what they are! lol

BMR:  6006 KJ & 1435 Cal(I get the calorie part but whats the other thing)

Impedence: 495 ( and it has this wierd symbol next to it)

FFM: 101.4 LB

TBW: 74.2 LB

Do u guys know what those are? I just want to be able to know what those numbers mean so if you do just please let me know!

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TBW is total body water. I bought a fancy scales the other day that does TBW and fat % and according to the sheet that came with it, at 15 you should be 52-55% water apparently. ...I work out that you're 62% from your stats...and that at 15% fat you're under the 'normal' section, in my little booklet, by quite a bit. Says you should be 21-25% fat to be classed in their normal category. Your BMI seems low too...think about upping the cals there girl!  As for the other figures, google them? Ah google...what would I do without it? :D
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Thanks so much! Well i wish you guys could see what i look like because i dont look too thin at all. So if im like 72 pounds water is that like really bad? Like what do i do to make it normal?
BMR - Basal Metabolic Rate

Impedance Analysis and definition

FFM - Fat Free Mass

Seems like if they are making you do this, they should be explaining the output to you.  Ask your teacher if he/she knows what they mean.
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Thanks sydthekid! Yea i was like uhh is she gonna explain what this means? But she didnt and i should have asked. Thanks alot for that though!

You're 15 years old  at 5'6" and just under 120 lbs with 15% body fat. 

Which means  you're perfect.

Please don't get all concerned with all the different readings on the Tanita. For one thing it is not all that accurate to begin with. You could get different readings at different times of the same day with those devices. 

They do provide a good baseline if you are tracking your body fat over a long period of time. 

Unless you have goals to become a competing Body builder as you get older than do not concern yourself with these matters.

Concern yourself more with a healthy diet along with fun exercise and activities. 
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Thanks, i was just confused with it at first. I do understand that there all just different and always changing.
Filling in the missing answer: KJ is kiloJoules, the metric measurement of energy that is more directly related to the other standard metric units than is "calorie."

The unit of force is 1 Newton, which is the force required to accelerate 1 kg at the rate of 1 meter per second per second. This is written

1 N = 1 kg-m/s**2

That is, one kilogram-meter per second squared.

1 Joule is the energy expended when exerting a force of 1 Newton over a distance of 1 meter:

1 J = 1 N-m = 1 kg-m**2 / s**2

(one kilogram-meter squared per second squared)

1 Watt is 1 Joule per second:

1 W = 1 J/s = 1 N-m/s = 1 kg-m**2 / s**3

(one kilogram-meter squared per second cubed)

1 calorie (to a scientist) is the amount of energy needed to heat 1 gram of water 1 degree Celsius. A "dieter's calorie" is actually 1 kilocalorie to a scientist. "Dieter's calories" are often distinguished from real calories either by capitalizing them (as in "Calorie"), by calling them by their proper name (kcal), or by calling them "kilogram-calories", as in the amount of energy required to raise the temperature of 1 kilogram of water 1 degree Celsius.

Finally, 4.19 Joules = 1 calorie. 4,190 Joules = 4.19 kJ = 1 kilocalorie = the energy needed to run a 100 Watt light bulb for 42 seconds.

For another common way to visualize this, 1 horsepower = 746 Watts = 746 J/s = 0.18 kcal/s.

Looking at all of this, one quickly realizes that there is a *tremendous* amount of energy stored in food (and in fat), and that we humans consume and expend fantastic amounts of energy every day (three quarters of which, during exercise, is waste heat, with only about a quarter of the energy we expend actually going into moving our bodies around).

1 pound of fat = 3500 kcal, or enough energy to run a 100 Watt light bulb for more than a day and a half, or to develop 1 horsepower for almost five and a half hours (ignoring waste heat for the moment--divide the time by four to account for waste heat).

Trivia: Newton, Joule, and Watt are named after scientists and inventors; hence the capitalization. That's probably more than you wanted to know. :-) I didn't want these units to be black boxes to anyone. They really are related to real world measurements that you can see.
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