Folks, there is no magic pill that all of the sudden makes players never tire, get massively huge (except steroids), shed blockers, etc. That comes from recruiting the type of talent that has the ability and size to do those things. In the past, KY has recruited guys who were too small, limited in their ability, and limited genetic makeup to be the typical SEC freak size that beat up KY players on a weekly basis.
Where Korem's results come into play is how often the players are being injured. Not talking about ACL tears, broken bones, separated shoulders, etc. The human body can only take so much and in a serious collision sport like football those injuries are going to happen. What I am talking about are muscle pulls and tears, proper nutrition, having the energy to train and practice at an optimal level, etc. I would love to see the stats since he arrived, but I would bet the house there are far less smaller injuries than there used to be.
As for Elam, obviously a lot of you folks have never trained much in your life. Let's say he was 400 when he arrived and he is in fact 360 now. How do you know that he did not put on 20+ lbs of muscle since he arrived? He could have very well lost 75 lbs of fat since he arrived. He easily played his best game this past Saturday. I saw tons of improvement in him. If you can't see it then I do not know what to tell you.
Mikel Horton looked completely different and you could tell a mile away has made significant improvement in his speed and agility in the offseason.
Point blank, the skill players all look to be in tremendous shape. The big guys looked like SEC caliber guys. Try playing in very hot and muggy conditions weighing over 230+ lbs, play the number of snaps the defense had to play, and see how long it takes for you to get gassed. The best part is (as far as I know) there were no significant injuries.