Yay hardgainers. I'm the leanest I've been in a couple of years. First I lost a lot of weight due to atrophy while being injured. While I've been recovering I've decided to compete in track and all of the sprinting has kept me even leaner than usual. I'm interested in your experiment because once the season is over I will probably want my 20 lbs back.
By the way, have you learned any new gymnastic skills?