I discovered that I did the calculations wrong for my target weight. Lyle McDonald has a formula on his Body Composition site:
Goal Weight = Current Lean Body Mass / (1-Goal Body Fat percentage as a decimal)
My LBM is 144.4. My Goal Body Fat percentage is 15%. So the correct goal weight is:
144.4/(1-.15) = 170 lbs
Checking it backwards, if my fat percentage is 15% then my LBM is 85%:
170 x 0.85 = 144.5 – so that’s the correct formula.
I was calculating it as LBM x (1 + Body Fat percentage as a decimal) which was a number of 166 lbs. I know it’s not a huge difference but at 190.8 lbs getting to 170 seems slightly more doable than 166 lbs.
I really like Lyle’s site. Lot of good information. And better math than my own math.
NIH Calculator for body weight
