If one can maintain strength levels while dieting, once the return to their pre diet bodyweight, or close to it, they should be stronger than before right?
For example I'm floating around 102kg at the moment and hitting PR's all over the place. I've put on a couple of kg in the last month so I attribute that to having a significant role, in addition to over hauling my training.
I'll be going down to 95/96kg so I can compete at 90kg (18 hour weigh in) so if I can even maintain my strength levels (i actually expect them to increase), when I come off the diet and bulk back up I should add a load of muscle and probably a bit of fat. Assuming this leaves me close to 102kg again, my strength should improve greatly due to increased leverages right?