How the elastic training works exactly?
Some skills are related training-wise. So if one of them is higher than the others, when you train the lower they improve way faster. For example, if your inside defense is 15 and your inside shooting is 5, if you train IS it will pop much more frequently than if both were 10.
Talking specifically about OD, it is one of the slowest trainings overall. So usually what most people do is to train 1x1, which trains somewhat quickly handling, driving and jump shot, then when handling is high they shift to OD and profit from the elastic effect...