System for measuring a user's percentage of body fat

1. A system for measuring percentage of body fat for a user, the system comprising:

means for measuring body hydration and generating a signal representing a measured hydration value;

means for selectively changing the measured hydration value to an adjusted hydration value based upon a first parameter to thereby reflect more accurately an actual hydration value for the user, in the event that the user is determined to be dehydrated based upon the first parameter, and generating a signal representing the adjusted hydration value; and

means for measuring body fat percentage using the signal representing: a) the measured hydration value, in the event that the user is determined not to be dehydrated based upon the first parameter; or b) the adjusted hydration value in the event that the user is determined to be dehydrated based upon the first parameter and the means for selectively changing the measured hydration value changes the measured hydration value based upon the first parameter.

2. A system for measuring percentage of body fat for a user according to claim 1 wherein the means for selectively changing the measured hydration value comprises means for automatically changing the measured hydration value, in the event that the user is determined to be dehydrated, to an adjusted hydration value based upon the first parameter.

3. The system for measuring percentage of body fat for a user according to claim 2 wherein the first parameter comprises a preset minimum hydration value and the means for selectively changing the measured hydration value comprises means for changing the measured hydration value to the preset minimum hydration value in the event that the measured hydration value is below the preset minimum hydration value.

4. The system for measuring percentage of body fat for a user according to claim 3 wherein the means for measuring body hydration comprises means for notifying the user that the user is not properly hydrated in the event that the measured hydration value is below the preset minimum hydration value.

5. The system for measuring percentage of body fat for a user according to claim 3 wherein the preset minimum hydration value is based upon a conventional adequate hydration value derived from a general population analysis.

6. The system for measuring percentage of body fat for a user according to claim 3 wherein the preset minimum hydration value is a baseline hydration value derived from a plurality of prior hydration measurements used by the means for measuring body fat percentage for the user.

7. The system for measuring percentage of body fat for a user according to claim 6 wherein the baseline hydration value is derived by using at least two prior hydration values for the user used by the means for measuring body fat percentage.

8. The system for measuring percentage of body fat for a user according to claim 7 wherein the two prior hydration values are successive hydration values used by the means for measuring body fat percentage.

9. The system for measuring percentage of body fat for a user according to claim 6 wherein the baseline hydration value is derived by averaging a plurality of prior hydration values used by the means for measuring body fat percentage.

10. The system for measuring percentage of body fat for a user according to claim 6 wherein the baseline hydration value is derived by averaging at least two and less than all prior hydration values from a collection of prior hydration values used by the means for measuring body fat percentage in the collection of prior hydration values.

11. The system for measuring percentage of body fat for a user according to claim 1 wherein the system further comprises a display for identifying user body fat percentage as measured by the means for measuring body fat in a human readable form.

12. The system for measuring percentage of body fat for a user according to claim 11 wherein the means for measuring body fat percentage generates a signal in non-human readable form representing measured body fat percentage and the system further comprises a conversion means for changing the signal representing body fat percentage from non-human readable form into a human readable form.

13. The system for measuring percentage of body fat for a user according to claim 12 wherein the means for measuring hydration, means for measuring body fat, and display are at a first location and the conversion means is at a second, remote location.

14. The system for measuring percentage of body fat for a user according to claim 12 wherein the means for measuring hydration, means for measuring body fat, and display are all at the same location.

15. The system for measuring percentage of body fat for a user according to claim 13 wherein the signal representing measured body fat percentage is conveyed to the conversion means over one of a local area network or the internet.

16. The system for measuring percentage of body fat for a user according to claim 15 wherein the means for measuring hydration, means for measuring body fat, and display are combined into an instrument at the first location.

17. The system for measuring percentage of body fat for a user according to claim 1 wherein the first parameter comprises a preset minimum hydration value and the means for measuring body hydration comprises means for notifying a user that the user is not properly hydrated as indicated by the fact that a measured hydration value is below the preset minimum hydration value and thereafter sending a signal to the means for measuring body fat percentage only after the means for measuring body hydration has generated a signal representing a second measured hydration value and after the user has been notified that the user is not properly hydrated.

18. The system for measuring percentage of body fat for a user according to claim 6 wherein the means for selectively changing the measured hydration value comprises means for generating a signal representing the measured hydration value used by the means for measuring body fat percentage in the event that the measured hydration value exceeds the baseline hydration value.

19. The system for measuring percentage of body fat according to claim 1 wherein the means for measuring body fat percentage comprises means for measuring body fat percentage based upon a measured electrical resistance.

20. The system for measuring percentage of body fat for a user according to claim 3 wherein the preset minimum hydration value is on the order of 75%.