I bought an omron handheld body fat analyzer shortly after i started hcg and have recorded those results daily while on P2 and every week or so when on a different phase. there are a number of factors that affect it- when you're less hydrated your body fat percentage goes up; when you're more hydrated it goes down. so it's best to look at an average over several days.
many who want to exercise in P3 wonder how to tell how much weight gain is fat (which they don't want), and how much is muscle (which they do). if you're gaining muscle, you don't want to do a steak day- if it's fat, you do.
so here's an easy way to track it. instead of focusing on what your body fat percentage is, just use that to figure out how many pounds of fat you have. So let's say you weight 140# and your unit tells you that your percentage body fat is 30%. multiply 140 x .30 and you know that your total fat weight is 42#. Record that figure along with your daily weight.
i've been working out a LOT in P4, trying to build muscle since i've been de-conditioned for so long. watching the scale rise has made me a bit nervous. but i've gone back and figured out what my average "fat" measurement was at the end of my last round (in june), and what it is now- and it's exactly the same. :) So i know that the weight i've gained is muscle, not fat.
normally i'd only be concerned about how my clothes were fitting, but Dr. S. does say that you can gain a significant amount of weight without that changing because you gain the fat differently after hcg. so this can be a way to differentiate that.
the new model that just came out is $27. well worth it, imo. here's the link: http://www.amazon.com/Omron-HBF-306C-Loss-Monitor-Black/dp/B000FYZMYK/ref=sr_1_1?ie=UTF8&s=hpc&qid=1284587832&sr=1-1
it is an impedance-type of unit (like those on scales) but gets better reviews than the scales do.
no inexpensive method of measuring BF is accurate- the only truly accurate methods are by underwater weighing, a DEXA scan, or getting tested in a Bod Pod. but the benefit for me is for comparison purposes as i lose weight- and i've been happy with it's overall consistency.
i think that is so strange, colleen, because i'm post-menopausal and it's very consistent for me (i don't know how accurate, but it's consistent). it's also consistent for those women who track their BF on my unit. i wonder what would throw it off for some people? the only thing i notice on a day to day basis is that your BF looks lower when you're hydrated, higher when you're dehydrated. i think that's why they say to check it first thing in the morning before you drink anything.