Just a little background about me, I've been lifting for about 9 months, was a pretty skinny dude to start (5'10.5", 130 lb.). Now I'm slightly less skinny (140 lb.). My question is about body fat levels, as I've always had a naturally low body fat percentage. According to my electronic scale, I'm either 9% or 10% depending on the particular day. This also seems to be about right in looking at member pics on the forum here (unfortuantely no digicam here, so I can't post pics of my own). I've been a very lean guy since childhood, and I've probably always had a body fat percentage around this level.
I'm just curious how low one's body fat percentage can be while still being safe? Are there any negative health effects associated with a lifelong body fat percentage of 10%? Thanks for any opinions you might have on this.