Eventually Kayla & Callie “need to leave the nest” and phase out of the Billings Last Diet program, meaning flying through the real world again avoiding fast food temptation, and trying to maintain their goal weight. A good way to do this is working out, but not having done so in years and with a new body, they wanted to start with something slower… more relaxed… and the fact that this certain something would help them mentally and spiritually was just a big bonus.