Nutrition Assessment for Sport and Life


joel and theresa photoThis interpretation is for general use for persons who have been tested using BIA entered into Clinical Nutrition Software.  Different interpretations are given by NAS for individuals with special health conditions or undernutriton or overnutrition.  If you have questions you may wish to discuss them with a dietitian with a certificate of completion course in BIA Interpretation from Nutrition Assessment Services.

The ideal test situation is to take the test in the morning before breakfast and before having had a physical  workout or at least four hours since your last meal with no workout, coffee or alcohol during the day of the test.  Morning test results may be slightly different from the ones we take after lunch.  Your test results will be marked for a re-test if improved hydration and accuracy is required.  You may wish to include this analysis as baseline data in your health record.

The following is an explanation of what type of information you may see on your printout.

Total Body Water is an estimate of your hydration level.  For optimal hydration this reading should be in the upper half of the normal range.  If not, you may consider drinking more fluid/water each day.  For example  consume 500 to 1000 ml before lunch and the same in the afternoon.

Intracellular Water is an estimate of the water in your muscle and will be in the high range if you have a large amount of muscle and it is well hydrated.

Extracellular Water is water in your tissues and plasma.  It should be close to the low normal range in males and may be in the low or mid range for females.

Body Cell Mass (sometimes called Active Tissue Mass) is an estimate of your total pounds of body muscle and is calculated based on intracellular water.  It will be in the normal range if you are close to your ideal body weight.  Many people who are overweight have a very large muscle mass even though BCM does not appear to be in the normal range. It is important to maintain or improve this figure when making any exercise or nutritional changes.  As you lose body fat, this measure will come into the normal range.  If this measure drops you should see your dietitian to help with your diet. It may also drop if you change your exercise becomes more aerobic instead of weight lifting.

Extracellular Tissue is an estimate of the mass of all other non-muscle tissues including: ligaments, bone, extracellular water, etc.

Fat Free Mass is an estimate of your entire mass that is not fat.

Fat Mass is an estimate of your pounds of body fat and your percentage body fat.  Most women are content with the same number of pounds of fat mass as Body Cell Mass or muscle mass.  Most men are content with half as much Fat Mass as Body Cell Mass.  Athletic people may have lower body fat especially in their competitive season.

Phase Angle is a measure of overall health and fitness and may indicate the integrity of your cell walls.  The normal range is between 4 and 9 degrees.  It is important to maintain or improve this figure when making any exercise or nutritional changes.  If this test is under 6 you should have a nutrition review by a dietitian.

Basal Metabolism is an estimate of your kcalorie requirement each day while completely resting.  Physical activity and daily activity need to be added to this number to estimate actual kcalorie requirements.