Hmm, seems like the water % might be causing some inaccuracy/inconsistency in terms of bf and muscle mass. Did you try to account for that? For example by maintaining a consistent water intake regimen before sleep and upon waking followed by discharging before taking measurements.

This post has been edited by entryman: May 21 2012, 01:53 PM

I just meant maintaining consistency. For example, a glass of water before sleep, then upon waking, urinate, then followed by another glass of water, then measure. Can be different for you, just the consistency. Because water consumption can affect the bio-impedance reading to a significant degree.

http://www.4hbtalk.com/viewtopic.php?f=46&t=1643&start=30

Check out the post by justhamade at 12:40pm, which quotes an excerpt from a book, starting with "2.IF YOU CHOOSE TO USE BIO-ELECTRICAL IMPEDANCE (BEI), YOU NEED CONSISTENT HYDRATION."

It's up to you. As you can see from both posts, it's about consistency, as hydration levels will lead to significant fluctuations in the bio-impedance testing, thereby affecting your muscle mass and fat reading. Which is why such devices are not useful if you value accuracy. But for the normal everyday person they're good enough for an approximation. And personally, I would follow the advice in the first link, it's from the best-selling book 4hour body.