thanks for the reply, and i agree, we are probably making this too hard--- and with too much math.
the thinking was- using your example
200 lbs man x 20 % body fat is 40lbs of fat
goal is to get to 15% body fat, and to do that, would need to keep measuring lean body mass. would hope that as participants are working out, their muscle mass would increase- as would their body composition
using the same example, the 200 lbs man could weigh the same but be at 15% body fat, and would have lost 10lbs of fat. vs when he was at 20%
my question-- and i apologize for not asking it correctly--- is it harder for a woman to change her body fat percent than a man, and if so, is there a conversion table that i can use?
for example a 5% change for a man is equivalent to a 3% change for woman.
like you said, probably just easier to see who can lose the most weight.