FFM stands for fat free mass.
It is what you weigh without any fat, just as it says. We, of course, require a certian percentage of body fat to maintain a healthy body. For women my age, and for Pat's, we need to be between 25-35% fat. (not like the 41% I currently am :D)
Because Pat (Harlynana) is currently putting on muscles mass, she is reducing the amount of fat on her body, and changing the number of fat pounds she can and should carry. She's actually increasing the number of fat pounds she should have! | 