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5.) Press ENTER to start the body fat estimation sequence.
6) Enter Age in years
7) Enter Sex by pressing the MALE or FEMALE Key.
8) Enter Weight in lb or kg. Press ENTER.
9) Enter Body Frame by pressing the SMALL, MEDIUM or LARGE Key (not asked if the subject is bewteen the ages of 5 and 17).
There are many methods for measuring Frame Size. Futrex does not recommend any specific method but does offer two
techniques often used for determining frame size:
a) Ankle Girth
• Measure the ankle girth at the smallest point above the ankle with the tape as tight as possible.
• Standards
b) Wrist Girth
• Place your left thumb and middle finger around your right wrist and gently squeeze your fingers together.
• Small Frame - Fingers overlap
• Medium Frame - Fingers touch
• Large Frame - Fingers do not touch
NOTE: The age entered in Step 6 automatically places the instrument into the proper calibration for estimation.
(i.e. adults 18 and above, adolescents 13-17, pre-adolescents 5-12)
Small Frame Medium Frame Large Frame
Men Less than 8 inches 8 to 9.25 inches Greater than 9.25 inches
Women Less than 7.5 inches 7.5 to 8.75 inches Greater than 8.75 inches
NOTE: If you have long fingers, this method may
underestimate your frame size.