The blogs listed here are about bodybuilding through exercise, specifically weight training. They also frequently touch on body fat and how to bulk up.
Regular Blogs
Contains fitness news and advice with weekly nutrition and body building tips, cardio and weight training information.
http://www.dailymuscle.com/
Offers advice about nutrition and training and includes posts about power lifting. She also writes about eating, the role of calories, weight training for swimmers, and body fat specifically as those topics relate to women.
http://www.stumptuous.com
A young woman who used to be a couch potato writes about getting and staying fit and eating healthier as opposed to crash dieting and slacking.
http://www.tryingfitness.com