I use the calipers to determine body fat. Actually, I have it tested at school. They have real (expensive) calipers, not the free plastic ones that come in a Cybergenics kit. I have always been told that hydrostatic is the best method, though... -Rob in Lubbock _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com.