They now inform the athletes and have them either continue to do some training over holidays, or lower their re-introduction to heavier training loads for up to 6 weeks.
They have also done away with training camps, where athletes might be encouraged to suddenly double their weekly loads. Or, if they still do the training camps, they have athletes complete homework that is akin to 'pre-loading', so that the acute load is not more than is safe. They also remove exercises that create unnecessary demands on athletes. For example, there is no need for Judo Athletes to suddenly complete sprints at a training camp. It's not specific to their sport, and, in fact, has led to more AIS hamstring injuries in Judo than anything else. Removing sprints, and adding acceptable load increases, prevents injuries and allows for consistency in training!
As for a return to activety from time away from sport, there is no simple solution. Regarding injury, rehabilitation needs to be functional. The Athlete needs to be prepped, also, so that the demands their body is put under do not exceed its capacity. But what about time away from training? For example, holidays? An interesting concept also emerged from the AIS' work that computes an equation about holiday down time, and how quickly one can return to full training loads.
What if in the next week, the runner wants to run 15 Kilometers? Their chronic load would still be 10Ks x 10Ks x 10Ks x10Ks/4 or 10Ks. However their acute load would be 15ks. The acute:chronic load is now 15:10 or 1.5.
It turns out, this ratio can predict the likelihood of injury quite well. And the ratio you want to maintain is somewhere between 0.8 and 1.3. Beyond 1.3, the relative risk of injury increases dramatically, and at 2, the probability of injury is very high.