lean body mass is basically everything that is not fat. You probably got a fat % number. too.
But if you didn't, i calculated it to be 63 lbs which a is a body fat % of 31.5.
You do not necessarily want to lose 63 lbs. You need 10-12% body fat just to survive. 21-24% is considered fit for a woman.
So you have your LBM. Let's say you have a goal of 145. Your LBM is 137. That would be only 5lbs of fat! So way too low.
Let's talk 170 lbs. take 170-137 = 33 lbs. 33/170=.19 a little low, but not for an athlete.
175 lbs? = 175-137 = 38 lbs fat. 38/175 = 22% body fat. Yes. That is a good goal.
So regardless of what everyone thinks. If you weighed 175 lbs. And you did NOT lose a significant amount of lean muscle or other lbm- you would be 22% body fat and considered fit.
I hope this helps. Here is a link for you! http://www.healthchecksystems.com/bodyfat.htm
***oh one thing, it may be that as you lose weight you will lose some lean body mass--it is ok to tweak your weight loss according to that. ***