About deconditioning and weight training, a very short resume can be found here:
About deconditioning and PE, these are just few of thre related threads:
Who has found that gains come easier after a long lay off?
Breaks and progress?
Good stuff. I don’t agree with its use in weight-training though, and have never came across somebody who did, but that is all opinionated anyway. You convinced me as to its use in PE, but I’m still unsure.