Maintaining muscle on CR diets

[Guest guest]

Hi Im a 23 year old male currently 6'0 " 240lbs and into weightlifting.

I like my size and strength but would like to begin a CR diet to

prolong life. Problem is that 1800kcal/day is very little for me and

will have a detrimental impact on my athletic endeavors. I can stand

to lose some fat and could even live with losing some muscle but Ive

been told that to get the CR effect Id have to drop to 130-140lbs.

Thats a 100lbs drop for me! At the weight I would look like a

holocaust victim. I know that the body has a " set point " that keep

ones weight within a reasonable range. Is it possible that even at

1800kcal/day my body will be able to keep me at a very lean

180-185lbs? I currently have about 20% bf so that puts me a 190lbs

lean anyway for what im asking is whether this diet will have the

effect of stripping away most of my fat yet retaining my muscle if I

keep my protein intake and muscle-building stimulus high?

thanks